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Importing lodash functions from lodash-es
Raw
README.md 
import {chunk, zipObject} from 'lodash-es';

console.log(zipObject(chunk(['a', 'b', 'c', 'd'], 2)));
$ rollup -f=iife demo.js > output.js
Raw
output.js
(function () { 'use strict';
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;
var MAX_INTEGER = 1e308;
/**
* Converts `value` to an integer.
*
* **Note:** This function is loosely based on [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toInteger('3.14');
* // => 3
*
* _.toInteger(NaN);
* // => 0
*
* _.toInteger(-Infinity)
* // => -1e308
*/
function toInteger(value) {
if (value === INFINITY || value === -INFINITY) {
return (value < 0 ? -1 : 1) * MAX_INTEGER;
}
value = +value;
var remainder = value % 1;
return value === value ? (remainder ? value - remainder : value) : 0;
}
/**
* The base implementation of `_.slice` without an iteratee call guard.
*
* @private
* @param {Array} array The array to slice.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`.
*/
function baseSlice(array, start, end) {
var index = -1,
length = array.length;
start = start == null ? 0 : toInteger(start);
if (start < 0) {
start = -start > length ? 0 : (length + start);
}
end = (end === undefined || end > length) ? length : toInteger(end);
if (end < 0) {
end += length;
}
length = start > end ? 0 : ((end - start) >>> 0);
start >>>= 0;
var result = Array(length);
while (++index < length) {
result[index] = array[index + start];
}
return result;
}
var nativeCeil = Math.ceil;
var nativeMax = Math.max;
/**
* Creates an array of elements split into groups the length of `size`.
* If `collection` can't be split evenly, the final chunk will be the remaining
* elements.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to process.
* @param {number} [size=0] The length of each chunk.
* @returns {Array} Returns the new array containing chunks.
* @example
*
* _.chunk(['a', 'b', 'c', 'd'], 2);
* // => [['a', 'b'], ['c', 'd']]
*
* _.chunk(['a', 'b', 'c', 'd'], 3);
* // => [['a', 'b', 'c'], ['d']]
*/
function chunk(array, size) {
size = nativeMax(toInteger(size), 0);
var length = array ? array.length : 0;
if (!length || size < 1) {
return [];
}
var index = 0,
resIndex = -1,
result = Array(nativeCeil(length / size));
while (index < length) {
result[++resIndex] = baseSlice(array, index, (index += size));
}
return result;
}
/**
* Checks if `value` is classified as an `Array` object.
*
* @static
* @memberOf _
* @type Function
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isArray([1, 2, 3]);
* // => true
*
* _.isArray(document.body.children);
* // => false
*
* _.isArray('abc');
* // => false
*
* _.isArray(_.noop);
* // => false
*/
var isArray = Array.isArray;
/**
* The inverse of `_.pairs`; this method returns an object composed from arrays
* of property names and values. Provide either a single two dimensional array,
* e.g. `[[key1, value1], [key2, value2]]` or two arrays, one of property names
* and one of corresponding values.
*
* @static
* @memberOf _
* @category Array
* @param {Array} props The property names.
* @param {Array} [values=[]] The property values.
* @returns {Object} Returns the new object.
* @example
*
* _.zipObject([['fred', 30], ['barney', 40]]);
* // => { 'fred': 30, 'barney': 40 }
*
* _.zipObject(['fred', 'barney'], [30, 40]);
* // => { 'fred': 30, 'barney': 40 }
*/
function zipObject(props, values) {
var index = -1,
length = props ? props.length : 0,
result = {};
if (length && !values && !isArray(props[0])) {
values = [];
}
while (++index < length) {
var key = props[index];
if (values) {
result[key] = values[index];
} else if (key) {
result[key[0]] = key[1];
}
}
return result;
}
/**
* Adds two numbers.
*
* @static
* @memberOf _
* @category Math
* @param {number} augend The first number to add.
* @param {number} addend The second number to add.
* @returns {number} Returns the sum.
* @example
*
* _.add(6, 4);
* // => 10
*/
function add(augend, addend) {
var result;
if (augend === augend && augend != null) {
result = augend;
}
if (addend === addend && addend != null) {
result = result === undefined ? addend : (result + addend);
}
return result;
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';
/**
* The opposite of `_.before`; this method creates a function that invokes
* `func` once it's called `n` or more times.
*
* @static
* @memberOf _
* @category Function
* @param {number} n The number of calls before `func` is invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* var saves = ['profile', 'settings'];
*
* var done = _.after(saves.length, function() {
* console.log('done saving!');
* });
*
* _.forEach(saves, function(type) {
* asyncSave({ 'type': type, 'complete': done });
* });
* // => logs 'done saving!' after the two async saves have completed
*/
function after(n, func) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT);
}
n = toInteger(n);
return function() {
if (--n < 1) {
return func.apply(this, arguments);
}
};
}
/**
* This method returns the first argument provided to it.
*
* @static
* @memberOf _
* @category Utility
* @param {*} value Any value.
* @returns {*} Returns `value`.
* @example
*
* var object = { 'user': 'fred' };
*
* _.identity(object) === object;
* // => true
*/
function identity(value) {
return value;
}
/**
* Checks if `value` is a global object.
*
* @private
* @param {*} value The value to check.
* @returns {null|Object} Returns `value` if it's a global object, else `null`.
*/
function checkGlobal(value) {
return (value && value.Object === Object) ? value : null;
}
/** Used to determine if values are of the language type `Object`. */
var objectTypes = {
'function': true,
'object': true
};
/** Detect free variable `exports`. */
var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType) ? exports : null;
/** Detect free variable `module`. */
var freeModule = (objectTypes[typeof module] && module && !module.nodeType) ? module : null;
/** Detect free variable `global` from Node.js. */
var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
/** Detect free variable `self`. */
var freeSelf = checkGlobal(objectTypes[typeof self] && self);
/** Detect free variable `window`. */
var freeWindow = checkGlobal(objectTypes[typeof window] && window);
/** Detect `this` as the global object. */
var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
/**
* Used as a reference to the global object.
*
* The `this` value is used if it's the global object to avoid Greasemonkey's
* restricted `window` object, otherwise the `window` object is used.
*/
var root = freeGlobal || ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) || freeSelf || thisGlobal || Function('return this')();
/**
* Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject(value) {
// Avoid a V8 JIT bug in Chrome 19-20.
// See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}
var funcTag = '[object Function]';
var genTag = '[object GeneratorFunction]';
/** Used for built-in method references. */
var objectProto$7 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$4 = objectProto$7.toString;
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 8 which returns 'object' for typed array constructors, and
// PhantomJS 1.9 which returns 'function' for `NodeList` instances.
var tag = isObject(value) ? objToString$4.call(value) : '';
return tag == funcTag || tag == genTag;
}
/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`.
*/
function isHostObject(value) {
// Many host objects are `Object` objects that can coerce to strings
// despite having improperly defined `toString` methods.
var result = false;
if (value != null && typeof value.toString != 'function') {
try {
result = !!(value + '');
} catch (e) {}
}
return result;
}
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return !!value && typeof value == 'object';
}
/** Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */
var reRegExpChar$1 = /[\\^$.*+?()[\]{}|]/g;
/** Used to detect host constructors (Safari > 5). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;
/** Used for built-in method references. */
var objectProto$8 = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var fnToString = Function.prototype.toString;
/** Used to check objects for own properties. */
var hasOwnProperty$4 = objectProto$8.hasOwnProperty;
/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
fnToString.call(hasOwnProperty$4).replace(reRegExpChar$1, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/**
* Checks if `value` is a native function.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function, else `false`.
* @example
*
* _.isNative(Array.prototype.push);
* // => true
*
* _.isNative(_);
* // => false
*/
function isNative(value) {
if (value == null) {
return false;
}
if (isFunction(value)) {
return reIsNative.test(fnToString.call(value));
}
return isObjectLike(value) &&
(isHostObject(value) ? reIsNative : reIsHostCtor).test(value);
}
/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = object == null ? undefined : object[key];
return isNative(value) ? value : undefined;
}
/* Built-in method references that are verified to be native. */
var WeakMap = getNative(root, 'WeakMap');
/** Used to store function metadata. */
var metaMap = WeakMap && new WeakMap;
/**
* The base implementation of `setData` without support for hot loop detection.
*
* @private
* @param {Function} func The function to associate metadata with.
* @param {*} data The metadata.
* @returns {Function} Returns `func`.
*/
var baseSetData = !metaMap ? identity : function(func, data) {
metaMap.set(func, data);
return func;
};
/**
* The base implementation of `_.create` without support for assigning
* properties to the created object.
*
* @private
* @param {Object} prototype The object to inherit from.
* @returns {Object} Returns the new object.
*/
var baseCreate = (function() {
function object() {}
return function(prototype) {
if (isObject(prototype)) {
object.prototype = prototype;
var result = new object;
object.prototype = undefined;
}
return result || {};
};
}());
/**
* Creates a function that produces an instance of `Ctor` regardless of
* whether it was invoked as part of a `new` expression or by `call` or `apply`.
*
* @private
* @param {Function} Ctor The constructor to wrap.
* @returns {Function} Returns the new wrapped function.
*/
function createCtorWrapper(Ctor) {
return function() {
// Use a `switch` statement to work with class constructors.
// See http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
// for more details.
var args = arguments;
switch (args.length) {
case 0: return new Ctor;
case 1: return new Ctor(args[0]);
case 2: return new Ctor(args[0], args[1]);
case 3: return new Ctor(args[0], args[1], args[2]);
case 4: return new Ctor(args[0], args[1], args[2], args[3]);
case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
}
var thisBinding = baseCreate(Ctor.prototype),
result = Ctor.apply(thisBinding, args);
// Mimic the constructor's `return` behavior.
// See https://es5.github.io/#x13.2.2 for more details.
return isObject(result) ? result : thisBinding;
};
}
/**
* Creates a function that wraps `func` and invokes it with the `this`
* binding of `thisArg`.
*
* @private
* @param {Function} func The function to bind.
* @param {*} [thisArg] The `this` binding of `func`.
* @returns {Function} Returns the new bound function.
*/
function createBindWrapper(func, thisArg) {
var Ctor = createCtorWrapper(func);
function wrapper() {
var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
return fn.apply(thisArg, arguments);
}
return wrapper;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$12 = Math.max;
/**
* Creates an array that is the composition of partially applied arguments,
* placeholders, and provided arguments into a single array of arguments.
*
* @private
* @param {Array|Object} args The provided arguments.
* @param {Array} partials The arguments to prepend to those provided.
* @param {Array} holders The `partials` placeholder indexes.
* @returns {Array} Returns the new array of composed arguments.
*/
function composeArgs(args, partials, holders) {
var holdersLength = holders.length,
argsIndex = -1,
argsLength = nativeMax$12(args.length - holdersLength, 0),
leftIndex = -1,
leftLength = partials.length,
result = Array(leftLength + argsLength);
while (++leftIndex < leftLength) {
result[leftIndex] = partials[leftIndex];
}
while (++argsIndex < holdersLength) {
result[holders[argsIndex]] = args[argsIndex];
}
while (argsLength--) {
result[leftIndex++] = args[argsIndex++];
}
return result;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$13 = Math.max;
/**
* This function is like `composeArgs` except that the arguments composition
* is tailored for `_.partialRight`.
*
* @private
* @param {Array|Object} args The provided arguments.
* @param {Array} partials The arguments to append to those provided.
* @param {Array} holders The `partials` placeholder indexes.
* @returns {Array} Returns the new array of composed arguments.
*/
function composeArgsRight(args, partials, holders) {
var holdersIndex = -1,
holdersLength = holders.length,
argsIndex = -1,
argsLength = nativeMax$13(args.length - holdersLength, 0),
rightIndex = -1,
rightLength = partials.length,
result = Array(argsLength + rightLength);
while (++argsIndex < argsLength) {
result[argsIndex] = args[argsIndex];
}
var offset = argsIndex;
while (++rightIndex < rightLength) {
result[offset + rightIndex] = partials[rightIndex];
}
while (++holdersIndex < holdersLength) {
result[offset + holders[holdersIndex]] = args[argsIndex++];
}
return result;
}
/**
* Copies the values of `source` to `array`.
*
* @private
* @param {Array} source The array to copy values from.
* @param {Array} [array=[]] The array to copy values to.
* @returns {Array} Returns `array`.
*/
function copyArray(source, array) {
var index = -1,
length = source.length;
array || (array = Array(length));
while (++index < length) {
array[index] = source[index];
}
return array;
}
/**
* The function whose prototype all chaining wrappers inherit from.
*
* @private
*/
function baseLodash() {
// No operation performed.
}
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH$3 = 4294967295;
/**
* Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
*
* @private
* @param {*} value The value to wrap.
*/
function LazyWrapper(value) {
this.__wrapped__ = value;
this.__actions__ = [];
this.__dir__ = 1;
this.__filtered__ = false;
this.__iteratees__ = [];
this.__takeCount__ = MAX_ARRAY_LENGTH$3;
this.__views__ = [];
}
LazyWrapper.prototype = baseCreate(baseLodash.prototype);
LazyWrapper.prototype.constructor = LazyWrapper;
/**
* A no-operation function that returns `undefined` regardless of the
* arguments it receives.
*
* @static
* @memberOf _
* @category Utility
* @example
*
* var object = { 'user': 'fred' };
*
* _.noop(object) === undefined;
* // => true
*/
function noop() {
// No operation performed.
}
/**
* Gets metadata for `func`.
*
* @private
* @param {Function} func The function to query.
* @returns {*} Returns the metadata for `func`.
*/
var getData = !metaMap ? noop : function(func) {
return metaMap.get(func);
};
/** Used to lookup unminified function names. */
var realNames = {};
/**
* Gets the name of `func`.
*
* @private
* @param {Function} func The function to query.
* @returns {string} Returns the function name.
*/
function getFuncName(func) {
var result = (func.name + ''),
array = realNames[result],
length = array ? array.length : 0;
while (length--) {
var data = array[length],
otherFunc = data.func;
if (otherFunc == null || otherFunc == func) {
return data.name;
}
}
return result;
}
/**
* The base constructor for creating `lodash` wrapper objects.
*
* @private
* @param {*} value The value to wrap.
* @param {boolean} [chainAll] Enable chaining for all wrapper methods.
*/
function LodashWrapper(value, chainAll) {
this.__wrapped__ = value;
this.__actions__ = [];
this.__chain__ = !!chainAll;
this.__index__ = 0;
this.__values__ = undefined;
}
LodashWrapper.prototype = baseCreate(baseLodash.prototype);
LodashWrapper.prototype.constructor = LodashWrapper;
/**
* Creates a clone of `wrapper`.
*
* @private
* @param {Object} wrapper The wrapper to clone.
* @returns {Object} Returns the cloned wrapper.
*/
function wrapperClone(wrapper) {
if (wrapper instanceof LazyWrapper) {
return wrapper.clone();
}
var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
result.__actions__ = copyArray(wrapper.__actions__);
result.__index__ = wrapper.__index__;
result.__values__ = wrapper.__values__;
return result;
}
/** Used for built-in method references. */
var objectProto$15 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$6 = objectProto$15.hasOwnProperty;
/**
* Creates a `lodash` object which wraps `value` to enable implicit method
* chaining. Methods that operate on and return arrays, collections, and
* functions can be chained together. Methods that retrieve a single value or
* may return a primitive value will automatically end the chain sequence and
* return the unwrapped value. Otherwise, the value must be unwrapped with
* `_#value`.
*
* Explicit chaining, which must be unwrapped with `_#value` in all cases,
* may be enabled using `_.chain`.
*
* The execution of chained methods is lazy, that is, execution is deferred
* until `_#value` is implicitly or explicitly called.
*
* Lazy evaluation allows several methods to support shortcut fusion. Shortcut
* fusion is an optimization strategy which merge iteratee calls; this can help
* to avoid the creation of intermediate data structures and greatly reduce the
* number of iteratee executions.
*
* Chaining is supported in custom builds as long as the `_#value` method is
* directly or indirectly included in the build.
*
* In addition to lodash methods, wrappers have `Array` and `String` methods.
*
* The wrapper `Array` methods are:
* `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
*
* The wrapper `String` methods are:
* `replace` and `split`
*
* The wrapper methods that support shortcut fusion are:
* `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, `findLast`,
* `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, `tail`,
* `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
*
* The chainable wrapper methods are:
* `after`, `ary`, `assign`, `assignWith`, `at`, `before`, `bind`, `bindAll`,
* `bindKey`, `chain`, `chunk`, `commit`, `compact`, `concat`, `conforms`,
* `conj`, `constant`, `countBy`, `create`, `curry`, `debounce`, `defaults`,
* `defaultsDeep`, `defer`, `delay`, `difference`, `differenceBy`, `disj`,
* `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `extend`, `extendWith`,
* `fill`, `filter`, `flatten`, `flattenDeep`, `flip`, `flow`, `flowRight`,
* `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
* `functions`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
* `invert`, `invoke`, `iteratee`, `keyBy`, `keys`, `keysIn`, `map`, `mapKeys`,
* `mapValues`, `matches`, `matchesProperty`, `memoize`, `merge`, `mergeWith`,
* `method`, `methodOf`, `mixin`, `modArgs`, `modArgsSet', 'negate`, `nthArg`,
* `omit`, `omitBy`, `once`, `pairs`, `partial`, `partialRight`, `partition`,
* `pick`, `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`,
* `pullAllBy`, `pullAt`, `push`, `range`, `rearg`, `reject`, `remove`, `rest`,
* `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`, `slice`, `sort`, `sortBy`,
* `sortByOrder`, `splice`, `spread`, `tail`, `take`, `takeRight`, `takeRightWhile`,
* `takeWhile`, `tap`, `throttle`, `thru`, `times`, `toArray`, `toPath`,
* `toPlainObject`, `transform`, `union`, `unionBy`, `uniq`, `uniqBy`, `unset`,
* `unshift`, `unzip`, `unzipWith`, `values`, `valuesIn`, `without`, `wrap`,
* `xor`, `xorBy`, `zip`, `zipObject`, and `zipWith`
*
* The wrapper methods that are **not** chainable by default are:
* `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
* `cloneDeep`, `cloneDeepWith`, `cloneWith`, `deburr`, `endsWith`, `eq`,
* `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
* `findLastIndex`, `findLastKey`, `floor`, `get`, `gt`, `gte`, `has`, `hasIn`,
* `head`, `identity`, `includes`, `indexOf`, `inRange`, `isArguments`, `isArray`,
* `isArrayLike`, `isArrayLikeObject`, `isBoolean`, `isDate`, `isElement`,
* `isEmpty`, `isEqual`, `isEqualWith`, `isError`, `isFinite`, `isFunction`,
* `isInteger`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
* `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
* `isSafeInteger`, `isString`, `isUndefined`, `isTypedArray`, `join`, `kebabCase`,
* `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `min`,
* `noConflict`, `noop`, `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`,
* `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`, `runInContext`,
* `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`,
* `sortedLastIndex`, `sortedLastIndexBy`, `startCase`, `startsWith`, `sum`,
* `sumBy`, `template`, `toLower`, `toInteger`, `toSafeInteger`, `toString`,
* `toUpper`, `trim`, `trimLeft`, `trimRight`, `trunc`, `unescape`, `uniqueId`,
* `upperCase`, `upperFirst`, `value`, and `words`
*
* @name _
* @constructor
* @category Chain
* @param {*} value The value to wrap in a `lodash` instance.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var wrapped = _([1, 2, 3]);
*
* // returns an unwrapped value
* wrapped.reduce(_.add);
* // => 6
*
* // returns a wrapped value
* var squares = wrapped.map(square);
*
* _.isArray(squares);
* // => false
*
* _.isArray(squares.value());
* // => true
*/
function lodash(value) {
if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
if (value instanceof LodashWrapper) {
return value;
}
if (hasOwnProperty$6.call(value, '__wrapped__')) {
return wrapperClone(value);
}
}
return new LodashWrapper(value);
}
// Ensure wrappers are instances of `baseLodash`.
lodash.prototype = baseLodash.prototype;
/**
* Checks if `func` has a lazy counterpart.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
*/
function isLaziable(func) {
var funcName = getFuncName(func),
other = lodash[funcName];
if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
return false;
}
if (func === other) {
return true;
}
var data = getData(other);
return !!data && func === data[0];
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$5 = 9007199254740991;
/** Used to detect unsigned integer values. */
var reIsUint = /^\d+$/;
/**
* Checks if `value` is a valid array-like index.
*
* @private
* @param {*} value The value to check.
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
*/
function isIndex(value, length) {
value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
length = length == null ? MAX_SAFE_INTEGER$5 : length;
return value > -1 && value % 1 == 0 && value < length;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$9 = Math.min;
/**
* Reorder `array` according to the specified indexes where the element at
* the first index is assigned as the first element, the element at
* the second index is assigned as the second element, and so on.
*
* @private
* @param {Array} array The array to reorder.
* @param {Array} indexes The arranged array indexes.
* @returns {Array} Returns `array`.
*/
function reorder(array, indexes) {
var arrLength = array.length,
length = nativeMin$9(indexes.length, arrLength),
oldArray = copyArray(array);
while (length--) {
var index = indexes[length];
array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
}
return array;
}
/** Used as the internal argument placeholder. */
var PLACEHOLDER = '__lodash_placeholder__';
/**
* Replaces all `placeholder` elements in `array` with an internal placeholder
* and returns an array of their indexes.
*
* @private
* @param {Array} array The array to modify.
* @param {*} placeholder The placeholder to replace.
* @returns {Array} Returns the new array of placeholder indexes.
*/
function replaceHolders(array, placeholder) {
var index = -1,
length = array.length,
resIndex = -1,
result = [];
while (++index < length) {
if (array[index] === placeholder) {
array[index] = PLACEHOLDER;
result[++resIndex] = index;
}
}
return result;
}
/**
* Gets the timestamp of the number of milliseconds that have elapsed since
* the Unix epoch (1 January 1970 00:00:00 UTC).
*
* @static
* @memberOf _
* @type Function
* @category Date
* @returns {number} Returns the timestamp.
* @example
*
* _.defer(function(stamp) {
* console.log(_.now() - stamp);
* }, _.now());
* // => logs the number of milliseconds it took for the deferred function to be invoked
*/
var now = Date.now;
var HOT_COUNT = 150;
var HOT_SPAN = 16;
/**
* Sets metadata for `func`.
*
* **Note:** If this function becomes hot, i.e. is invoked a lot in a short
* period of time, it will trip its breaker and transition to an identity function
* to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070)
* for more details.
*
* @private
* @param {Function} func The function to associate metadata with.
* @param {*} data The metadata.
* @returns {Function} Returns `func`.
*/
var setData = (function() {
var count = 0,
lastCalled = 0;
return function(key, value) {
var stamp = now(),
remaining = HOT_SPAN - (stamp - lastCalled);
lastCalled = stamp;
if (remaining > 0) {
if (++count >= HOT_COUNT) {
return key;
}
} else {
count = 0;
}
return baseSetData(key, value);
};
}());
var BIND_FLAG$3 = 1;
var BIND_KEY_FLAG$3 = 2;
var CURRY_BOUND_FLAG = 4;
var CURRY_FLAG$2 = 8;
var CURRY_RIGHT_FLAG$1 = 16;
var PARTIAL_FLAG$5 = 32;
var PARTIAL_RIGHT_FLAG$2 = 64;
var ARY_FLAG$2 = 128;
var FLIP_FLAG$1 = 512;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$11 = Math.max;
/**
* Creates a function that wraps `func` and invokes it with optional `this`
* binding of, partial application, and currying.
*
* @private
* @param {Function|string} func The function or method name to reference.
* @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partials] The arguments to prepend to those provided to the new function.
* @param {Array} [holders] The `partials` placeholder indexes.
* @param {Array} [partialsRight] The arguments to append to those provided to the new function.
* @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
* @param {Array} [argPos] The argument positions of the new function.
* @param {number} [ary] The arity cap of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
var isAry = bitmask & ARY_FLAG$2,
isBind = bitmask & BIND_FLAG$3,
isBindKey = bitmask & BIND_KEY_FLAG$3,
isCurry = bitmask & CURRY_FLAG$2,
isCurryBound = bitmask & CURRY_BOUND_FLAG,
isCurryRight = bitmask & CURRY_RIGHT_FLAG$1,
isFlip = bitmask & FLIP_FLAG$1,
Ctor = isBindKey ? undefined : createCtorWrapper(func);
function wrapper() {
// Avoid `arguments` object use disqualifying optimizations by
// converting it to an array before providing it to other functions.
var length = arguments.length,
index = length,
args = Array(length);
while (index--) {
args[index] = arguments[index];
}
if (partials) {
args = composeArgs(args, partials, holders);
}
if (partialsRight) {
args = composeArgsRight(args, partialsRight, holdersRight);
}
if (isCurry || isCurryRight) {
var placeholder = wrapper.placeholder,
argsHolders = replaceHolders(args, placeholder);
length -= argsHolders.length;
if (length < arity) {
var newArgPos = argPos ? copyArray(argPos) : undefined,
newArity = nativeMax$11(arity - length, 0),
newsHolders = isCurry ? argsHolders : undefined,
newHoldersRight = isCurry ? undefined : argsHolders,
newPartials = isCurry ? args : undefined,
newPartialsRight = isCurry ? undefined : args;
bitmask |= (isCurry ? PARTIAL_FLAG$5 : PARTIAL_RIGHT_FLAG$2);
bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG$2 : PARTIAL_FLAG$5);
if (!isCurryBound) {
bitmask &= ~(BIND_FLAG$3 | BIND_KEY_FLAG$3);
}
var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, newArity],
result = createHybridWrapper.apply(undefined, newData);
if (isLaziable(func)) {
setData(result, newData);
}
result.placeholder = placeholder;
return result;
}
}
var thisBinding = isBind ? thisArg : this,
fn = isBindKey ? thisBinding[func] : func;
if (argPos) {
args = reorder(args, argPos);
} else if (isFlip && args.length > 1) {
args.reverse();
}
if (isAry && ary < args.length) {
args.length = ary;
}
if (this && this !== root && this instanceof wrapper) {
fn = Ctor || createCtorWrapper(func);
}
return fn.apply(thisBinding, args);
}
return wrapper;
}
/** Used to compose bitmasks for wrapper metadata. */
var BIND_FLAG$4 = 1;
/**
* Creates a function that wraps `func` and invokes it with the optional `this`
* binding of `thisArg` and the `partials` prepended to those provided to
* the wrapper.
*
* @private
* @param {Function} func The function to partially apply arguments to.
* @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
* @param {*} thisArg The `this` binding of `func`.
* @param {Array} partials The arguments to prepend to those provided to the new function.
* @returns {Function} Returns the new bound function.
*/
function createPartialWrapper(func, bitmask, thisArg, partials) {
var isBind = bitmask & BIND_FLAG$4,
Ctor = createCtorWrapper(func);
function wrapper() {
// Avoid `arguments` object use disqualifying optimizations by
// converting it to an array before providing it `func`.
var argsIndex = -1,
argsLength = arguments.length,
leftIndex = -1,
leftLength = partials.length,
args = Array(leftLength + argsLength);
while (++leftIndex < leftLength) {
args[leftIndex] = partials[leftIndex];
}
while (argsLength--) {
args[leftIndex++] = arguments[++argsIndex];
}
var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
return fn.apply(isBind ? thisArg : this, args);
}
return wrapper;
}
var BIND_FLAG$5 = 1;
var CURRY_BOUND_FLAG$1 = 4;
var CURRY_FLAG$3 = 8;
var ARY_FLAG$3 = 128;
var REARG_FLAG$2 = 256;
/** Used as the internal argument placeholder. */
var PLACEHOLDER$1 = '__lodash_placeholder__';
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$8 = Math.min;
/**
* Merges the function metadata of `source` into `data`.
*
* Merging metadata reduces the number of wrappers used to invoke a function.
* This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
* may be applied regardless of execution order. Methods like `_.ary` and `_.rearg`
* modify function arguments, making the order in which they are executed important,
* preventing the merging of metadata. However, we make an exception for a safe
* common case where curried functions have `_.ary` and or `_.rearg` applied.
*
* @private
* @param {Array} data The destination metadata.
* @param {Array} source The source metadata.
* @returns {Array} Returns `data`.
*/
function mergeData(data, source) {
var bitmask = data[1],
srcBitmask = source[1],
newBitmask = bitmask | srcBitmask,
isCommon = newBitmask < ARY_FLAG$3;
var isCombo =
(srcBitmask == ARY_FLAG$3 && (bitmask == CURRY_FLAG$3)) ||
(srcBitmask == ARY_FLAG$3 && (bitmask == REARG_FLAG$2) && (data[7].length <= source[8])) ||
(srcBitmask == (ARY_FLAG$3 | REARG_FLAG$2) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG$3));
// Exit early if metadata can't be merged.
if (!(isCommon || isCombo)) {
return data;
}
// Use source `thisArg` if available.
if (srcBitmask & BIND_FLAG$5) {
data[2] = source[2];
// Set when currying a bound function.
newBitmask |= (bitmask & BIND_FLAG$5) ? 0 : CURRY_BOUND_FLAG$1;
}
// Compose partial arguments.
var value = source[3];
if (value) {
var partials = data[3];
data[3] = partials ? composeArgs(partials, value, source[4]) : copyArray(value);
data[4] = partials ? replaceHolders(data[3], PLACEHOLDER$1) : copyArray(source[4]);
}
// Compose partial right arguments.
value = source[5];
if (value) {
partials = data[5];
data[5] = partials ? composeArgsRight(partials, value, source[6]) : copyArray(value);
data[6] = partials ? replaceHolders(data[5], PLACEHOLDER$1) : copyArray(source[6]);
}
// Use source `argPos` if available.
value = source[7];
if (value) {
data[7] = copyArray(value);
}
// Use source `ary` if it's smaller.
if (srcBitmask & ARY_FLAG$3) {
data[8] = data[8] == null ? source[8] : nativeMin$8(data[8], source[8]);
}
// Use source `arity` if one is not provided.
if (data[9] == null) {
data[9] = source[9];
}
// Use source `func` and merge bitmasks.
data[0] = source[0];
data[1] = newBitmask;
return data;
}
var BIND_FLAG$2 = 1;
var BIND_KEY_FLAG$2 = 2;
var PARTIAL_FLAG$3 = 32;
var PARTIAL_RIGHT_FLAG$1 = 64;
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$8 = 'Expected a function';
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$10 = Math.max;
/**
* Creates a function that either curries or invokes `func` with optional
* `this` binding and partially applied arguments.
*
* @private
* @param {Function|string} func The function or method name to reference.
* @param {number} bitmask The bitmask of wrapper flags.
* The bitmask may be composed of the following flags:
* 1 - `_.bind`
* 2 - `_.bindKey`
* 4 - `_.curry` or `_.curryRight` of a bound function
* 8 - `_.curry`
* 16 - `_.curryRight`
* 32 - `_.partial`
* 64 - `_.partialRight`
* 128 - `_.rearg`
* 256 - `_.ary`
* @param {*} [thisArg] The `this` binding of `func`.
* @param {Array} [partials] The arguments to be partially applied.
* @param {Array} [holders] The `partials` placeholder indexes.
* @param {Array} [argPos] The argument positions of the new function.
* @param {number} [ary] The arity cap of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new wrapped function.
*/
function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
var isBindKey = bitmask & BIND_KEY_FLAG$2;
if (!isBindKey && typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$8);
}
var length = partials ? partials.length : 0;
if (!length) {
bitmask &= ~(PARTIAL_FLAG$3 | PARTIAL_RIGHT_FLAG$1);
partials = holders = undefined;
}
length -= holders ? holders.length : 0;
if (bitmask & PARTIAL_RIGHT_FLAG$1) {
var partialsRight = partials,
holdersRight = holders;
partials = holders = undefined;
}
ary = ary == null ? ary : nativeMax$10(toInteger(ary), 0);
arity = arity == null ? arity : toInteger(arity);
var data = isBindKey ? undefined : getData(func),
newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];
if (data) {
mergeData(newData, data);
bitmask = newData[1];
arity = newData[9];
}
newData[9] = arity == null
? (isBindKey ? 0 : func.length)
: nativeMax$10(arity - length, 0);
if (bitmask == BIND_FLAG$2) {
var result = createBindWrapper(newData[0], newData[2]);
} else if ((bitmask == PARTIAL_FLAG$3 || bitmask == (BIND_FLAG$2 | PARTIAL_FLAG$3)) && !newData[4].length) {
result = createPartialWrapper.apply(undefined, newData);
} else {
result = createHybridWrapper.apply(undefined, newData);
}
var setter = data ? baseSetData : setData;
return setter(result, newData);
}
/** Used to compose bitmasks for wrapper metadata. */
var ARY_FLAG = 128;
/**
* Creates a function that accepts up to `n` arguments ignoring any
* additional arguments.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to cap arguments for.
* @param {number} [n=func.length] The arity cap.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Function} Returns the new function.
* @example
*
* _.map(['6', '8', '10'], _.ary(parseInt, 1));
* // => [6, 8, 10]
*/
function ary(func, n, guard) {
n = guard ? undefined : n;
n = (func && n == null) ? func.length : n;
return createWrapper(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
}
/**
* The base implementation of `_.property` without support for deep paths.
*
* @private
* @param {string} key The key of the property to get.
* @returns {Function} Returns the new function.
*/
function baseProperty(key) {
return function(object) {
return object == null ? undefined : object[key];
};
}
/**
* Gets the "length" property value of `object`.
*
* **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
* that affects Safari on at least iOS 8.1-8.3 ARM64.
*
* @private
* @param {Object} object The object to query.
* @returns {*} Returns the "length" value.
*/
var getLength = baseProperty('length');
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$4 = 9007199254740991;
/**
* Checks if `value` is a valid array-like length.
*
* **Note:** This function is based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
*/
function isLength(value) {
return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER$4;
}
/**
* Checks if `value` is array-like. A value is considered array-like if it's
* not a function and has a `value.length` that's an integer greater than or
* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
*
* @static
* @memberOf _
* @type Function
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
* @example
*
* _.isArrayLike([1, 2, 3]);
* // => true
*
* _.isArrayLike(document.body.children);
* // => true
*
* _.isArrayLike('abc');
* // => true
*
* _.isArrayLike(_.noop);
* // => false
*/
function isArrayLike(value) {
return value != null &&
!(typeof value == 'function' && isFunction(value)) && isLength(getLength(value));
}
/**
* Checks if the provided arguments are from an iteratee call.
*
* @private
* @param {*} value The potential iteratee value argument.
* @param {*} index The potential iteratee index or key argument.
* @param {*} object The potential iteratee object argument.
* @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
*/
function isIterateeCall(value, index, object) {
if (!isObject(object)) {
return false;
}
var type = typeof index;
if (type == 'number'
? (isArrayLike(object) && isIndex(index, object.length))
: (type == 'string' && index in object)) {
var other = object[index];
return value === value ? (value === other) : (other !== other);
}
return false;
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$5 = 'Expected a function';
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$7 = Math.max;
/**
* Creates a function that invokes `func` with the `this` binding of the
* created function and arguments from `start` and beyond provided as an array.
*
* **Note:** This method is based on the [rest parameter](https://mdn.io/rest_parameters).
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to apply a rest parameter to.
* @param {number} [start=func.length-1] The start position of the rest parameter.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.rest(function(what, names) {
* return what + ' ' + _.initial(names).join(', ') +
* (_.size(names) > 1 ? ', & ' : '') + _.last(names);
* });
*
* say('hello', 'fred', 'barney', 'pebbles');
* // => 'hello fred, barney, & pebbles'
*/
function rest(func, start) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$5);
}
start = nativeMax$7(start === undefined ? (func.length - 1) : toInteger(start), 0);
return function() {
var args = arguments,
index = -1,
length = nativeMax$7(args.length - start, 0),
array = Array(length);
while (++index < length) {
array[index] = args[start + index];
}
switch (start) {
case 0: return func.call(this, array);
case 1: return func.call(this, args[0], array);
case 2: return func.call(this, args[0], args[1], array);
}
var otherArgs = Array(start + 1);
index = -1;
while (++index < start) {
otherArgs[index] = args[index];
}
otherArgs[start] = array;
return func.apply(this, otherArgs);
};
}
/**
* Creates a function like `_.assign`.
*
* @private
* @param {Function} assigner The function to assign values.
* @returns {Function} Returns the new assigner function.
*/
function createAssigner(assigner) {
return rest(function(object, sources) {
var index = -1,
length = object == null ? 0 : sources.length,
customizer = length > 1 ? sources[length - 1] : undefined,
guard = length > 2 ? sources[2] : undefined;
customizer = typeof customizer == 'function' ? (length--, customizer) : undefined;
if (guard && isIterateeCall(sources[0], sources[1], guard)) {
customizer = length < 3 ? undefined : customizer;
length = 1;
}
object = Object(object);
while (++index < length) {
var source = sources[index];
if (source) {
assigner(object, source, customizer);
}
}
return object;
});
}
/**
* Assigns `value` to `key` of `object` if the existing value is not equivalent
* using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* @private
* @param {Object} object The object to modify.
* @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/
function assignValue(object, key, value) {
var oldValue = object[key];
if ((value === value ? (value !== oldValue) : (oldValue === oldValue)) ||
(value === undefined && !(key in object))) {
object[key] = value;
}
}
/**
* This function is like `copyObject` except that it accepts a function to
* customize copied values.
*
* @private
* @param {Object} source The object to copy properties from.
* @param {Array} props The property names to copy.
* @param {Object} [object={}] The object to copy properties to.
* @param {Function} [customizer] The function to customize copied values.
* @returns {Object} Returns `object`.
*/
function copyObjectWith(source, props, object, customizer) {
object || (object = {});
var index = -1,
length = props.length;
while (++index < length) {
var key = props[index],
newValue = customizer ? customizer(object[key], source[key], key, object, source) : source[key];
assignValue(object, key, newValue);
}
return object;
}
/**
* Copies properties of `source` to `object`.
*
* @private
* @param {Object} source The object to copy properties from.
* @param {Array} props The property names to copy.
* @param {Object} [object={}] The object to copy properties to.
* @returns {Object} Returns `object`.
*/
function copyObject(source, props, object) {
return copyObjectWith(source, props, object);
}
/** Used for built-in method references. */
var objectProto$17 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$8 = objectProto$17.hasOwnProperty;
/** Built-in value references. */
var getPrototypeOf$1 = Object.getPrototypeOf;
/**
* The base implementation of `_.has` without support for deep paths.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} key The key to check.
* @returns {boolean} Returns `true` if `key` exists, else `false`.
*/
function baseHas(object, key) {
// Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
// that are composed entirely of index properties, return `false` for
// `hasOwnProperty` checks of them.
return hasOwnProperty$8.call(object, key) ||
(typeof object == 'object' && key in object && getPrototypeOf$1(object) === null);
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = Object.keys;
/**
* The base implementation of `_.keys` which doesn't skip the constructor
* property of prototypes or treat sparse arrays as dense.
*
* @private
* @type Function
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeys(object) {
return nativeKeys(Object(object));
}
/**
* The base implementation of `_.times` without support for callback shorthands
* or max array length checks.
*
* @private
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the array of results.
*/
function baseTimes(n, iteratee) {
var index = -1,
result = Array(n);
while (++index < n) {
result[index] = iteratee(index);
}
return result;
}
/**
* This method is like `_.isArrayLike` except that it also checks if `value`
* is an object.
*
* @static
* @memberOf _
* @type Function
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array-like object, else `false`.
* @example
*
* _.isArrayLikeObject([1, 2, 3]);
* // => true
*
* _.isArrayLikeObject(document.body.children);
* // => true
*
* _.isArrayLikeObject('abc');
* // => false
*
* _.isArrayLikeObject(_.noop);
* // => false
*/
function isArrayLikeObject(value) {
return isObjectLike(value) && isArrayLike(value);
}
/** `Object#toString` result references. */
var argsTag = '[object Arguments]';
/** Used for built-in method references. */
var objectProto$3 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$3 = objectProto$3.hasOwnProperty;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString = objectProto$3.toString;
/** Built-in value references. */
var propertyIsEnumerable = objectProto$3.propertyIsEnumerable;
/**
* Checks if `value` is likely an `arguments` object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isArguments(function() { return arguments; }());
* // => true
*
* _.isArguments([1, 2, 3]);
* // => false
*/
function isArguments(value) {
// Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
return isArrayLikeObject(value) && hasOwnProperty$3.call(value, 'callee') &&
(!propertyIsEnumerable.call(value, 'callee') || objToString.call(value) == argsTag);
}
/** `Object#toString` result references. */
var stringTag = '[object String]';
/** Used for built-in method references. */
var objectProto$12 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$8 = objectProto$12.toString;
/**
* Checks if `value` is classified as a `String` primitive or object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isString('abc');
* // => true
*
* _.isString(1);
* // => false
*/
function isString(value) {
return typeof value == 'string' ||
(!isArray(value) && isObjectLike(value) && objToString$8.call(value) == stringTag);
}
/**
* Initializes an array of property names based on `object`. If `object` is
* an array, `arguments` object, or `string` its index keys are returned,
* otherwise an empty array is returned.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the initialized array of property names.
*/
function initKeys(object) {
var length = object ? object.length : 0;
length = (length && isLength(length) &&
(isArray(object) || isString(object) || isArguments(object)) && length) || 0;
return baseTimes(length, String);
}
/** Used for built-in method references. */
var objectProto$18 = Object.prototype;
/**
* Checks if `value` is likely a prototype object.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
*/
function isPrototype(value) {
var Ctor = value && value.constructor,
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$18;
return value === proto;
}
/**
* Creates an array of the own enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects. See the
* [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
* for more details.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keys(new Foo);
* // => ['a', 'b'] (iteration order is not guaranteed)
*
* _.keys('hi');
* // => ['0', '1']
*/
function keys(object) {
var isProto = isPrototype(object);
if (!(isProto || isArrayLike(object))) {
return baseKeys(object);
}
var result = initKeys(object),
length = result.length,
skipIndexes = !!length;
for (var key in object) {
if (baseHas(object, key) &&
!(skipIndexes && isIndex(key, length)) &&
!(isProto && key == 'constructor')) {
result.push(key);
}
}
return result;
}
/**
* Assigns own enumerable properties of source objects to the destination
* object. Source objects are applied from left to right. Subsequent sources
* overwrite property assignments of previous sources.
*
* **Note:** This method mutates `object` and is based on
* [`Object.assign`](http://ecma-international.org/ecma-262/6.0/#sec-object.assign).
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.c = 3;
* }
*
* function Bar() {
* this.e = 5;
* }
*
* Foo.prototype.d = 4;
* Bar.prototype.f = 6;
*
* _.assign({ 'a': 1 }, new Foo, new Bar);
* // => { 'a': 1, 'c': 3, 'e': 5 }
*/
var assign = createAssigner(function(object, source) {
copyObject(source, keys(source), object);
});
/**
* This method is like `_.assign` except that it accepts `customizer` which
* is invoked to produce the assigned values. If `customizer` returns `undefined`
* assignment is handled by the method instead. The `customizer` is invoked
* with five arguments: (objValue, srcValue, key, object, source).
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(objValue, srcValue) {
* return _.isUndefined(objValue) ? srcValue : objValue;
* }
*
* var defaults = _.partialRight(_.assignWith, customizer);
*
* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var assignWith = createAssigner(function(object, source, customizer) {
copyObjectWith(source, keys(source), object, customizer);
});
/**
* Converts `value` to a string if it's not one.
* An empty string is returned for `null` and `undefined` values.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to process.
* @returns {string} Returns the string.
*/
function toString(value) {
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value;
}
return value == null ? '' : (value + '');
}
/** Used to match property names within property paths. */
var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
/** Used to match backslashes in property paths. */
var reEscapeChar = /\\(\\)?/g;
/**
* Converts `string` to a property path array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the property path array.
*/
function stringToPath(string) {
var result = [];
toString(string).replace(rePropName, function(match, number, quote, string) {
result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
});
return result;
}
/**
* The base implementation of `_.toPath` which only converts `value` to a
* path if it's not one.
*
* @private
* @param {*} value The value to process.
* @returns {Array} Returns the property path array.
*/
function baseToPath(value) {
return isArray(value) ? value : stringToPath(value);
}
var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/;
var reIsPlainProp = /^\w*$/;
/**
* Checks if `value` is a property name and not a property path.
*
* @private
* @param {*} value The value to check.
* @param {Object} [object] The object to query keys on.
* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
*/
function isKey(value, object) {
if (typeof value == 'number') {
return true;
}
return !isArray(value) &&
(reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
(object != null && value in Object(object)));
}
/**
* The base implementation of `_.get` without support for default values.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @returns {*} Returns the resolved value.
*/
function baseGet(object, path) {
path = isKey(path, object) ? [path + ''] : baseToPath(path);
var index = 0,
length = path.length;
while (object != null && index < length) {
object = object[path[index++]];
}
return (index && index == length) ? object : undefined;
}
/**
* Gets the value at `path` of `object`. If the resolved value is
* `undefined` the `defaultValue` is used in its place.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to get.
* @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
* @returns {*} Returns the resolved value.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.get(object, 'a[0].b.c');
* // => 3
*
* _.get(object, ['a', '0', 'b', 'c']);
* // => 3
*
* _.get(object, 'a.b.c', 'default');
* // => 'default'
*/
function get(object, path, defaultValue) {
var result = object == null ? undefined : baseGet(object, path);
return result === undefined ? defaultValue : result;
}
/**
* The base implementation of `_.at` without support for individual path arguments.
*
* @private
* @param {Object} object The object to iterate over.
* @param {string[]} paths The property paths of elements to pick.
* @returns {Array} Returns the new array of picked elements.
*/
function baseAt(object, paths) {
var index = -1,
isNil = object == null,
length = paths.length,
result = Array(length);
while (++index < length) {
result[index] = isNil ? undefined : get(object, paths[index]);
}
return result;
}
/**
* Appends the elements of `values` to `array`.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to append.
* @returns {Array} Returns `array`.
*/
function arrayPush(array, values) {
var index = -1,
length = values.length,
offset = array.length;
while (++index < length) {
array[offset + index] = values[index];
}
return array;
}
/**
* The base implementation of `_.flatten` with support for restricting flattening.
*
* @private
* @param {Array} array The array to flatten.
* @param {boolean} [isDeep] Specify a deep flatten.
* @param {boolean} [isStrict] Restrict flattening to arrays-like objects.
* @param {Array} [result=[]] The initial result value.
* @returns {Array} Returns the new flattened array.
*/
function baseFlatten(array, isDeep, isStrict, result) {
result || (result = []);
var index = -1,
length = array.length;
while (++index < length) {
var value = array[index];
if (isArrayLikeObject(value) &&
(isStrict || isArray(value) || isArguments(value))) {
if (isDeep) {
// Recursively flatten arrays (susceptible to call stack limits).
baseFlatten(value, isDeep, isStrict, result);
} else {
arrayPush(result, value);
}
} else if (!isStrict) {
result[result.length] = value;
}
}
return result;
}
/**
* Creates an array of values corresponding to `paths` of `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {...(string|string[])} [paths] The property paths of elements to pick,
* specified individually or in arrays.
* @returns {Array} Returns the new array of picked elements.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
*
* _.at(object, ['a[0].b.c', 'a[1]']);
* // => [3, 4]
*
* _.at(['a', 'b', 'c'], 0, 2);
* // => ['a', 'c']
*/
var at = rest(function(object, paths) {
return baseAt(object, baseFlatten(paths));
});
/** `Object#toString` result references. */
var errorTag = '[object Error]';
/** Used for built-in method references. */
var objectProto$6 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$3 = objectProto$6.toString;
/**
* Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
* `SyntaxError`, `TypeError`, or `URIError` object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an error object, else `false`.
* @example
*
* _.isError(new Error);
* // => true
*
* _.isError(Error);
* // => false
*/
function isError(value) {
return isObjectLike(value) &&
typeof value.message == 'string' && objToString$3.call(value) == errorTag;
}
/**
* Attempts to invoke `func`, returning either the result or the caught error
* object. Any additional arguments are provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @category Utility
* @param {Function} func The function to attempt.
* @returns {*} Returns the `func` result or error object.
* @example
*
* // avoid throwing errors for invalid selectors
* var elements = _.attempt(function(selector) {
* return document.querySelectorAll(selector);
* }, '>_>');
*
* if (_.isError(elements)) {
* elements = [];
* }
*/
var attempt = rest(function(func, args) {
try {
return func.apply(undefined, args);
} catch (e) {
return isError(e) ? e : new Error(e);
}
});
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$1 = 'Expected a function';
/**
* Creates a function that invokes `func`, with the `this` binding and arguments
* of the created function, while it's called less than `n` times. Subsequent
* calls to the created function return the result of the last `func` invocation.
*
* @static
* @memberOf _
* @category Function
* @param {number} n The number of calls at which `func` is no longer invoked.
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* jQuery('#add').on('click', _.before(5, addContactToList));
* // => allows adding up to 4 contacts to the list
*/
function before(n, func) {
var result;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$1);
}
n = toInteger(n);
return function() {
if (--n > 0) {
result = func.apply(this, arguments);
}
if (n <= 1) {
func = undefined;
}
return result;
};
}
var BIND_FLAG = 1;
var PARTIAL_FLAG = 32;
/**
* Creates a function that invokes `func` with the `this` binding of `thisArg`
* and prepends any additional `_.bind` arguments to those provided to the
* bound function.
*
* The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
* may be used as a placeholder for partially applied arguments.
*
* **Note:** Unlike native `Function#bind` this method doesn't set the "length"
* property of bound functions.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to bind.
* @param {*} thisArg The `this` binding of `func`.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new bound function.
* @example
*
* var greet = function(greeting, punctuation) {
* return greeting + ' ' + this.user + punctuation;
* };
*
* var object = { 'user': 'fred' };
*
* var bound = _.bind(greet, object, 'hi');
* bound('!');
* // => 'hi fred!'
*
* // using placeholders
* var bound = _.bind(greet, object, _, '!');
* bound('hi');
* // => 'hi fred!'
*/
var bind = rest(function(func, thisArg, partials) {
var bitmask = BIND_FLAG;
if (partials.length) {
var holders = replaceHolders(partials, bind.placeholder);
bitmask |= PARTIAL_FLAG;
}
return createWrapper(func, bitmask, thisArg, partials, holders);
});
/**
* A specialized version of `_.forEach` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns `array`.
*/
function arrayEach(array, iteratee) {
var index = -1,
length = array.length;
while (++index < length) {
if (iteratee(array[index], index, array) === false) {
break;
}
}
return array;
}
/**
* Binds methods of an object to the object itself, overwriting the existing
* method.
*
* **Note:** This method doesn't set the "length" property of bound functions.
*
* @static
* @memberOf _
* @category Function
* @param {Object} object The object to bind and assign the bound methods to.
* @param {...(string|string[])} methodNames The object method names to bind,
* specified individually or in arrays.
* @returns {Object} Returns `object`.
* @example
*
* var view = {
* 'label': 'docs',
* 'onClick': function() {
* console.log('clicked ' + this.label);
* }
* };
*
* _.bindAll(view, 'onClick');
* jQuery('#docs').on('click', view.onClick);
* // => logs 'clicked docs' when the element is clicked
*/
var bindAll = rest(function(object, methodNames) {
arrayEach(baseFlatten(methodNames), function(key) {
object[key] = bind(object[key], object);
});
return object;
});
var BIND_FLAG$1 = 1;
var BIND_KEY_FLAG = 2;
var PARTIAL_FLAG$1 = 32;
/**
* Creates a function that invokes the method at `object[key]` and prepends
* any additional `_.bindKey` arguments to those provided to the bound function.
*
* This method differs from `_.bind` by allowing bound functions to reference
* methods that may be redefined or don't yet exist.
* See [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
* for more details.
*
* The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* @static
* @memberOf _
* @category Function
* @param {Object} object The object the method belongs to.
* @param {string} key The key of the method.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new bound function.
* @example
*
* var object = {
* 'user': 'fred',
* 'greet': function(greeting, punctuation) {
* return greeting + ' ' + this.user + punctuation;
* }
* };
*
* var bound = _.bindKey(object, 'greet', 'hi');
* bound('!');
* // => 'hi fred!'
*
* object.greet = function(greeting, punctuation) {
* return greeting + 'ya ' + this.user + punctuation;
* };
*
* bound('!');
* // => 'hiya fred!'
*
* // using placeholders
* var bound = _.bindKey(object, 'greet', _, '!');
* bound('hi');
* // => 'hiya fred!'
*/
var bindKey = rest(function(object, key, partials) {
var bitmask = BIND_FLAG$1 | BIND_KEY_FLAG;
if (partials.length) {
var holders = replaceHolders(partials, bindKey.placeholder);
bitmask |= PARTIAL_FLAG$1;
}
return createWrapper(key, bitmask, object, partials, holders);
});
/**
* A specialized version of `_.reduce` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @param {boolean} [initFromArray] Specify using the first element of `array` as the initial value.
* @returns {*} Returns the accumulated value.
*/
function arrayReduce(array, iteratee, accumulator, initFromArray) {
var index = -1,
length = array.length;
if (initFromArray && length) {
accumulator = array[++index];
}
while (++index < length) {
accumulator = iteratee(accumulator, array[index], index, array);
}
return accumulator;
}
/** Used to map latin-1 supplementary letters to basic latin letters. */
var deburredLetters = {
'\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
'\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
'\xc7': 'C', '\xe7': 'c',
'\xd0': 'D', '\xf0': 'd',
'\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
'\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
'\xcC': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
'\xeC': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
'\xd1': 'N', '\xf1': 'n',
'\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
'\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
'\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
'\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
'\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
'\xc6': 'Ae', '\xe6': 'ae',
'\xde': 'Th', '\xfe': 'th',
'\xdf': 'ss'
};
/**
* Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
*
* @private
* @param {string} letter The matched letter to deburr.
* @returns {string} Returns the deburred letter.
*/
function deburrLetter(letter) {
return deburredLetters[letter];
}
/** Used to match latin-1 supplementary letters (excluding mathematical operators). */
var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;
/** Used to compose unicode character classes. */
var rsComboRange = '\\u0300-\\u036f\\ufe20-\\ufe23';
/** Used to compose unicode capture groups. */
var rsCombo = '[' + rsComboRange + ']';
/** Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). */
var reComboMark = RegExp(rsCombo, 'g');
/**
* Deburrs `string` by converting [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
* to basic latin letters and removing [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to deburr.
* @returns {string} Returns the deburred string.
* @example
*
* _.deburr('déjà vu');
* // => 'deja vu'
*/
function deburr(string) {
string = toString(string);
return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');
}
var rsAstralRange$1 = '\\ud800-\\udfff';
var rsDingbatRange = '\\u2700-\\u27bf';
var rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff';
var rsMathOpRange = '\\xac\\xb1\\xd7\\xf7';
var rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf';
var rsQuoteRange = '\\u2018\\u2019\\u201c\\u201d';
var rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000';
var rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde';
var rsVarRange$1 = '\\ufe0e\\ufe0f';
var rsBreakRange = rsMathOpRange + rsNonCharRange + rsQuoteRange + rsSpaceRange;
var rsBreak = '[' + rsBreakRange + ']';
var rsDigits = '\\d+';
var rsDingbat = '[' + rsDingbatRange + ']';
var rsLower = '[' + rsLowerRange + ']';
var rsMisc = '[^' + rsAstralRange$1 + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']';
var rsModifier = '(?:\\ud83c[\\udffb-\\udfff])';
var rsNonAstral = '[^' + rsAstralRange$1 + ']';
var rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}';
var rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]';
var rsUpper = '[' + rsUpperRange + ']';
var rsZWJ$1 = '\\u200d';
var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')';
var rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')';
var reOptMod = rsModifier + '?';
var rsOptVar = '[' + rsVarRange$1 + ']?';
var rsOptJoin = '(?:' + rsZWJ$1 + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*';
var rsSeq = rsOptVar + reOptMod + rsOptJoin;
var rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq;
/** Used to match non-compound words composed of alphanumeric characters. */
var reBasicWord = /[a-zA-Z0-9]+/g;
/** Used to match complex or compound words. */
var reComplexWord = RegExp([
rsUpper + '?' + rsLower + '+(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
rsUpperMisc + '+(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
rsUpper + '?' + rsLowerMisc + '+',
rsDigits + '(?:' + rsLowerMisc + '+)?',
rsEmoji
].join('|'), 'g');
/** Used to detect strings that need a more robust regexp to match words. */
var reHasComplexWord = /[a-z][A-Z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
/**
* Splits `string` into an array of its words.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to inspect.
* @param {RegExp|string} [pattern] The pattern to match words.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Array} Returns the words of `string`.
* @example
*
* _.words('fred, barney, & pebbles');
* // => ['fred', 'barney', 'pebbles']
*
* _.words('fred, barney, & pebbles', /[^, ]+/g);
* // => ['fred', 'barney', '&', 'pebbles']
*/
function words(string, pattern, guard) {
string = toString(string);
pattern = guard ? undefined : pattern;
if (pattern === undefined) {
pattern = reHasComplexWord.test(string) ? reComplexWord : reBasicWord;
}
return string.match(pattern) || [];
}
/**
* Creates a function like `_.camelCase`.
*
* @private
* @param {Function} callback The function to combine each word.
* @returns {Function} Returns the new compounder function.
*/
function createCompounder(callback) {
return function(string) {
return arrayReduce(words(deburr(string)), callback, '');
};
}
/** Used to compose unicode character classes. */
var rsAstralRange$5 = '\\ud800-\\udfff';
var rsComboRange$5 = '\\u0300-\\u036f\\ufe20-\\ufe23';
var rsVarRange$5 = '\\ufe0e\\ufe0f';
var rsAstral$1 = '[' + rsAstralRange$5 + ']';
var rsCombo$2 = '[' + rsComboRange$5 + ']';
var rsModifier$2 = '(?:\\ud83c[\\udffb-\\udfff])';
var rsNonAstral$2 = '[^' + rsAstralRange$5 + ']';
var rsRegional$2 = '(?:\\ud83c[\\udde6-\\uddff]){2}';
var rsSurrPair$2 = '[\\ud800-\\udbff][\\udc00-\\udfff]';
var rsZWJ$5 = '\\u200d';
var reOptMod$2 = rsModifier$2 + '?';
var rsOptVar$2 = '[' + rsVarRange$5 + ']?';
var rsOptJoin$2 = '(?:' + rsZWJ$5 + '(?:' + [rsNonAstral$2, rsRegional$2, rsSurrPair$2].join('|') + ')' + rsOptVar$2 + reOptMod$2 + ')*';
var rsSeq$2 = rsOptVar$2 + reOptMod$2 + rsOptJoin$2;
var rsSymbol$1 = '(?:' + [rsNonAstral$2 + rsCombo$2 + '?', rsCombo$2, rsRegional$2, rsSurrPair$2, rsAstral$1].join('|') + ')';
/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
var reComplexSymbol$1 = RegExp(rsSymbol$1 + rsSeq$2, 'g');
/**
* Converts `string` to an array.
*
* @private
* @param {string} string The string to convert.
* @returns {Array} Returns the converted array.
*/
function stringToArray(string) {
return string ? string.match(reComplexSymbol$1) : [];
}
var rsAstralRange$2 = '\\ud800-\\udfff';
var rsComboRange$2 = '\\u0300-\\u036f\\ufe20-\\ufe23';
var rsVarRange$2 = '\\ufe0e\\ufe0f';
/** Used to compose unicode capture groups. */
var rsZWJ$2 = '\\u200d';
/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasComplexSymbol$1 = RegExp('[' + rsZWJ$2 + rsAstralRange$2 + rsComboRange$2 + rsVarRange$2 + ']');
/**
* Creates a function like `_.lowerFirst`.
*
* @private
* @param {string} methodName The name of the `String` case method to use.
* @returns {Function} Returns the new function.
*/
function createCaseFirst(methodName) {
return function(string) {
string = toString(string);
var strSymbols = reHasComplexSymbol$1.test(string) ? stringToArray(string) : undefined,
chr = strSymbols ? strSymbols[0] : string.charAt(0),
trailing = strSymbols ? strSymbols.slice(1).join('') : string.slice(1);
return chr[methodName]() + trailing;
};
}
/**
* Converts the first character of `string` to upper case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.upperFirst('fred');
* // => 'Fred'
*
* _.upperFirst('FRED');
* // => 'FRED'
*/
var upperFirst = createCaseFirst('toUpperCase');
/**
* Converts the first character of `string` to upper case and the remaining
* to lower case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to capitalize.
* @returns {string} Returns the capitalized string.
* @example
*
* _.capitalize('FRED');
* // => 'Fred'
*/
function capitalize(string) {
return upperFirst(toString(string).toLowerCase());
}
/**
* Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the camel cased string.
* @example
*
* _.camelCase('Foo Bar');
* // => 'fooBar'
*
* _.camelCase('--foo-bar');
* // => 'fooBar'
*
* _.camelCase('__foo_bar__');
* // => 'fooBar'
*/
var camelCase = createCompounder(function(result, word, index) {
word = word.toLowerCase();
return result + (index ? capitalize(word) : word);
});
/**
* Creates a function like `_.round`.
*
* @private
* @param {string} methodName The name of the `Math` method to use when rounding.
* @returns {Function} Returns the new round function.
*/
function createRound(methodName) {
var func = Math[methodName];
return function(number, precision) {
precision = precision ? toInteger(precision) : 0;
if (precision) {
// Shift with exponential notation to avoid floating-point issues.
// See [MDN](https://mdn.io/round#Examples) for more details.
var pair = (+number + 'e').split('e'),
value = func(pair[0] + 'e' + (+pair[1] + precision));
pair = (value + 'e').split('e');
return +(pair[0] + 'e' + (pair[1] - precision));
}
return func(number);
};
}
/**
* Calculates `number` rounded up to `precision`.
*
* @static
* @memberOf _
* @category Math
* @param {number} number The number to round up.
* @param {number} [precision=0] The precision to round up to.
* @returns {number} Returns the rounded up number.
* @example
*
* _.ceil(4.006);
* // => 5
*
* _.ceil(6.004, 2);
* // => 6.01
*
* _.ceil(6040, -2);
* // => 6100
*/
var ceil = createRound('ceil');
/**
* Creates a `lodash` object that wraps `value` with explicit method chaining enabled.
* The result of such method chaining must be unwrapped with `_#value`.
*
* @static
* @memberOf _
* @category Chain
* @param {*} value The value to wrap.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 },
* { 'user': 'pebbles', 'age': 1 }
* ];
*
* var youngest = _
* .chain(users)
* .sortBy('age')
* .map(function(o) {
* return o.user + ' is ' + o.age;
* })
* .head()
* .value();
* // => 'pebbles is 1'
*/
function chain(value) {
var result = lodash(value);
result.__chain__ = true;
return result;
}
/**
* Returns a number whose value is limited to the given range specified
* by `min` and `max`.
*
* @static
* @memberOf _
* @category Number
* @param {number} number The number whose value is to be limited.
* @param {number} [min] The minimum possible value.
* @param {number} max The maximum possible value.
* @returns {number} A number in the range [min, max].
* @example
*
* _.clamp(-10, -5, 5);
* // => -5
*
* _.clamp(10, -5, 5);
* // => 5
*/
function clamp(number, min, max) {
number = +number;
if (number === number) {
if (max === undefined) {
max = min;
min = undefined;
}
if (max !== undefined) {
max = +max;
max = max === max ? max : 0;
number = number <= max ? number : max;
}
if (min !== undefined) {
min = +min;
min = min === min ? min : 0;
number = number >= min ? number : min;
}
}
return number;
}
/**
* Gets the index at which the first occurrence of `key` is found in `array`
* of key-value pairs.
*
* @private
* @param {Array} array The array to search.
* @param {*} key The key to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function assocIndexOf(array, key) {
var length = array.length;
while (length--) {
if (array[length][0] === key) {
return length;
}
}
return -1;
}
/** Used for built-in method references. */
var arrayProto$4 = Array.prototype;
/** Built-in value references. */
var splice$2 = arrayProto$4.splice;
/**
* Removes `key` and its value from the associative array.
*
* @private
* @param {Array} array The array to query.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function assocDelete(array, key) {
var index = assocIndexOf(array, key);
if (index < 0) {
return false;
}
var lastIndex = array.length - 1;
if (index == lastIndex) {
array.pop();
} else {
splice$2.call(array, index, 1);
}
return true;
}
/**
* Removes `key` and its value from the stack.
*
* @private
* @name delete
* @memberOf Stack
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function stackDelete(key) {
var data = this.__data__,
array = data.array;
return array ? assocDelete(array, key) : data.map['delete'](key);
}
/**
* Gets the associative array value for `key`.
*
* @private
* @param {Array} array The array to query.
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function assocGet(array, key) {
var index = assocIndexOf(array, key);
return index < 0 ? undefined : array[index][1];
}
/**
* Gets the stack value for `key`.
*
* @private
* @name get
* @memberOf Stack
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function stackGet(key) {
var data = this.__data__,
array = data.array;
return array ? assocGet(array, key) : data.map.get(key);
}
/**
* Checks if an associative array value for `key` exists.
*
* @private
* @param {Array} array The array to query.
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function assocHas(array, key) {
return assocIndexOf(array, key) > -1;
}
/**
* Checks if a stack value for `key` exists.
*
* @private
* @name has
* @memberOf Stack
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function stackHas(key) {
var data = this.__data__,
array = data.array;
return array ? assocHas(array, key) : data.map.has(key);
}
/* Built-in method references that are verified to be native. */
var Map = getNative(root, 'Map');
/* Built-in method references that are verified to be native. */
var nativeCreate = getNative(Object, 'create');
/** Used for built-in method references. */
var objectProto$25 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$12 = objectProto$25.hasOwnProperty;
/**
* Checks if a hash value for `key` exists.
*
* @private
* @param {Object} hash The hash to query.
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function hashHas(hash, key) {
return nativeCreate ? hash[key] !== undefined : hasOwnProperty$12.call(hash, key);
}
/**
* Removes `key` and its value from the hash.
*
* @private
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function hashDelete(hash, key) {
return hashHas(hash, key) && delete hash[key];
}
/**
* Checks if `value` is suitable for use as unique object key.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is suitable, else `false`.
*/
function isKeyable(value) {
var type = typeof value;
return type == 'number' || type == 'boolean' ||
(type == 'string' && value !== '__proto__') || value == null;
}
/**
* Removes `key` and its value from the map.
*
* @private
* @name delete
* @memberOf MapCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function mapDelete(key) {
var data = this.__data__;
if (isKeyable(key)) {
return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
}
return Map ? data.map['delete'](key) : assocDelete(data.map, key);
}
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$2 = '__lodash_hash_undefined__';
/** Used for built-in method references. */
var objectProto$24 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$11 = objectProto$24.hasOwnProperty;
/**
* Gets the hash value for `key`.
*
* @private
* @param {Object} hash The hash to query.
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function hashGet(hash, key) {
if (nativeCreate) {
var result = hash[key];
return result === HASH_UNDEFINED$2 ? undefined : result;
}
return hasOwnProperty$11.call(hash, key) ? hash[key] : undefined;
}
/**
* Gets the map value for `key`.
*
* @private
* @name get
* @memberOf MapCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function mapGet(key) {
var data = this.__data__;
if (isKeyable(key)) {
return hashGet(typeof key == 'string' ? data.string : data.hash, key);
}
return Map ? data.map.get(key) : assocGet(data.map, key);
}
/**
* Checks if a map value for `key` exists.
*
* @private
* @name has
* @memberOf MapCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function mapHas(key) {
var data = this.__data__;
if (isKeyable(key)) {
return hashHas(typeof key == 'string' ? data.string : data.hash, key);
}
return Map ? data.map.has(key) : assocHas(data.map, key);
}
/**
* Sets the associative array `key` to `value`.
*
* @private
* @param {Array} array The array to modify.
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
*/
function assocSet(array, key, value) {
var index = assocIndexOf(array, key);
if (index < 0) {
array.push([key, value]);
} else {
array[index][1] = value;
}
}
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$3 = '__lodash_hash_undefined__';
/**
* Sets the hash `key` to `value`.
*
* @private
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
*/
function hashSet(hash, key, value) {
hash[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED$3 : value;
}
/**
* Sets the map `key` to `value`.
*
* @private
* @name set
* @memberOf MapCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the map cache object.
*/
function mapSet(key, value) {
var data = this.__data__;
if (isKeyable(key)) {
hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
} else if (Map) {
data.map.set(key, value);
} else {
assocSet(data.map, key, value);
}
return this;
}
/** Used for built-in method references. */
var objectProto$23 = Object.prototype;
/**
* Creates an hash object.
*
* @private
* @returns {Object} Returns the new hash object.
*/
function Hash() {}
// Avoid inheriting from `Object.prototype` when possible.
Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto$23;
/**
* Creates a map cache object to store key-value pairs.
*
* @private
* @param {Array} [values] The values to cache.
*/
function MapCache(values) {
var index = -1,
length = values ? values.length : 0;
this.__data__ = { 'hash': new Hash, 'map': Map ? new Map : [], 'string': new Hash };
while (++index < length) {
var entry = values[index];
this.set(entry[0], entry[1]);
}
}
// Add functions to the `MapCache`.
MapCache.prototype['delete'] = mapDelete;
MapCache.prototype.get = mapGet;
MapCache.prototype.has = mapHas;
MapCache.prototype.set = mapSet;
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE$4 = 200;
/**
* Sets the stack `key` to `value`.
*
* @private
* @name set
* @memberOf Stack
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the stack cache object.
*/
function stackSet(key, value) {
var data = this.__data__,
array = data.array;
if (array) {
if (array.length < (LARGE_ARRAY_SIZE$4 - 1)) {
assocSet(array, key, value);
} else {
data.array = null;
data.map = new MapCache(array);
}
}
var map = data.map;
if (map) {
map.set(key, value);
}
return this;
}
/**
* Creates a stack cache object to store key-value pairs.
*
* @private
* @param {Array} [values] The values to cache.
*/
function Stack(values) {
var index = -1,
length = values ? values.length : 0;
this.__data__ = { 'array': [], 'map': null };
while (++index < length) {
var entry = values[index];
this.set(entry[0], entry[1]);
}
}
// Add functions to the `Stack` cache.
Stack.prototype['delete'] = stackDelete;
Stack.prototype.get = stackGet;
Stack.prototype.has = stackHas;
Stack.prototype.set = stackSet;
/**
* The base implementation of `_.assign` without support for multiple sources
* or `customizer` functions.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @returns {Object} Returns `object`.
*/
function baseAssign(object, source) {
return object && copyObject(source, keys(source), object);
}
/**
* Creates a base function for methods like `_.forIn`.
*
* @private
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new base function.
*/
function createBaseFor(fromRight) {
return function(object, iteratee, keysFunc) {
var iterable = Object(object),
props = keysFunc(object),
length = props.length,
index = fromRight ? length : -1;
while ((fromRight ? index-- : ++index < length)) {
var key = props[index];
if (iteratee(iterable[key], key, iterable) === false) {
break;
}
}
return object;
};
}
/**
* The base implementation of `baseForIn` and `baseForOwn` which iterates
* over `object` properties returned by `keysFunc` invoking `iteratee` for
* each property. Iteratee functions may exit iteration early by explicitly
* returning `false`.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {Function} keysFunc The function to get the keys of `object`.
* @returns {Object} Returns `object`.
*/
var baseFor = createBaseFor();
/**
* The base implementation of `_.forOwn` without support for callback shorthands.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`.
*/
function baseForOwn(object, iteratee) {
return object && baseFor(object, iteratee, keys);
}
/* Built-in method references that are verified to be native. */
var Set = getNative(root, 'Set');
var mapTag$3 = '[object Map]';
var objectTag$3 = '[object Object]';
var setTag$3 = '[object Set]';
/** Used for built-in method references. */
var objectProto$20 = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var fnToString$2 = Function.prototype.toString;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$10 = objectProto$20.toString;
/** Used to detect maps and sets. */
var mapCtorString = Map ? fnToString$2.call(Map) : '';
var setCtorString = Set ? fnToString$2.call(Set) : '';
/**
* Gets the `toStringTag` of `value`.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function getTag(value) {
return objToString$10.call(value);
}
// Fallback for IE 11 providing `toStringTag` values for maps and sets.
if ((Map && getTag(new Map) != mapTag$3) || (Set && getTag(new Set) != setTag$3)) {
getTag = function(value) {
var result = objToString$10.call(value),
Ctor = result == objectTag$3 ? value.constructor : null,
ctorString = typeof Ctor == 'function' ? fnToString$2.call(Ctor) : '';
return ctorString == mapCtorString
? mapTag$3
: (ctorString == setCtorString ? setTag$3 : result);
};
}
var getTag$1 = getTag;
/** Used for built-in method references. */
var objectProto$21 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$9 = objectProto$21.hasOwnProperty;
/**
* Initializes an array clone.
*
* @private
* @param {Array} array The array to clone.
* @returns {Array} Returns the initialized clone.
*/
function initCloneArray(array) {
var length = array.length,
result = new array.constructor(length);
// Add array properties assigned by `RegExp#exec`.
if (length && typeof array[0] == 'string' && hasOwnProperty$9.call(array, 'index')) {
result.index = array.index;
result.input = array.input;
}
return result;
}
/** Built-in value references. */
var Uint8Array = root.Uint8Array;
/**
* Creates a clone of `buffer`.
*
* @private
* @param {ArrayBuffer} buffer The array buffer to clone.
* @returns {ArrayBuffer} Returns the cloned array buffer.
*/
function cloneBuffer(buffer) {
var Ctor = buffer.constructor,
result = new Ctor(buffer.byteLength),
view = new Uint8Array(result);
view.set(new Uint8Array(buffer));
return result;
}
/**
* Adds the key-value `pair` to `map`.
*
* @private
* @param {Object} map The map to modify.
* @param {Array} pair The key-value pair to add.
* @returns {Object} Returns `map`.
*/
function addMapEntry(map, pair) {
map.set(pair[0], pair[1]);
return map;
}
/**
* Converts `map` to an array.
*
* @private
* @param {Object} map The map to convert.
* @returns {Array} Returns the converted array.
*/
function mapToArray(map) {
var index = -1,
result = Array(map.size);
map.forEach(function(value, key) {
result[++index] = [key, value];
});
return result;
}
/**
* Creates a clone of `map`.
*
* @private
* @param {Object} map The map to clone.
* @returns {Object} Returns the cloned map.
*/
function cloneMap(map) {
var Ctor = map.constructor;
return arrayReduce(mapToArray(map), addMapEntry, new Ctor);
}
/** Used to match `RegExp` flags from their coerced string values. */
var reFlags$1 = /\w*$/;
/**
* Creates a clone of `regexp`.
*
* @private
* @param {Object} regexp The regexp to clone.
* @returns {Object} Returns the cloned regexp.
*/
function cloneRegExp(regexp) {
var Ctor = regexp.constructor,
result = new Ctor(regexp.source, reFlags$1.exec(regexp));
result.lastIndex = regexp.lastIndex;
return result;
}
/**
* Adds `value` to `set`.
*
* @private
* @param {Object} set The set to modify.
* @param {*} value The value to add.
* @returns {Object} Returns `set`.
*/
function addSetEntry(set, value) {
set.add(value);
return set;
}
/**
* Converts `set` to an array.
*
* @private
* @param {Object} set The set to convert.
* @returns {Array} Returns the converted array.
*/
function setToArray(set) {
var index = -1,
result = Array(set.size);
set.forEach(function(value) {
result[++index] = value;
});
return result;
}
/**
* Creates a clone of `set`.
*
* @private
* @param {Object} set The set to clone.
* @returns {Object} Returns the cloned set.
*/
function cloneSet(set) {
var Ctor = set.constructor;
return arrayReduce(setToArray(set), addSetEntry, new Ctor);
}
/**
* Creates a clone of `typedArray`.
*
* @private
* @param {Object} typedArray The typed array to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the cloned typed array.
*/
function cloneTypedArray(typedArray, isDeep) {
var buffer = typedArray.buffer,
Ctor = typedArray.constructor;
return new Ctor(isDeep ? cloneBuffer(buffer) : buffer, typedArray.byteOffset, typedArray.length);
}
var boolTag$3 = '[object Boolean]';
var dateTag$3 = '[object Date]';
var mapTag$4 = '[object Map]';
var numberTag$3 = '[object Number]';
var regexpTag$3 = '[object RegExp]';
var setTag$4 = '[object Set]';
var stringTag$3 = '[object String]';
var arrayBufferTag$2 = '[object ArrayBuffer]';
var float32Tag$2 = '[object Float32Array]';
var float64Tag$2 = '[object Float64Array]';
var int8Tag$2 = '[object Int8Array]';
var int16Tag$2 = '[object Int16Array]';
var int32Tag$2 = '[object Int32Array]';
var uint8Tag$2 = '[object Uint8Array]';
var uint8ClampedTag$2 = '[object Uint8ClampedArray]';
var uint16Tag$2 = '[object Uint16Array]';
var uint32Tag$2 = '[object Uint32Array]';
/**
* Initializes an object clone based on its `toStringTag`.
*
* **Note:** This function only supports cloning values with tags of
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
*
* @private
* @param {Object} object The object to clone.
* @param {string} tag The `toStringTag` of the object to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @returns {Object} Returns the initialized clone.
*/
function initCloneByTag(object, tag, isDeep) {
var Ctor = object.constructor;
switch (tag) {
case arrayBufferTag$2:
return cloneBuffer(object);
case boolTag$3:
case dateTag$3:
return new Ctor(+object);
case float32Tag$2: case float64Tag$2:
case int8Tag$2: case int16Tag$2: case int32Tag$2:
case uint8Tag$2: case uint8ClampedTag$2: case uint16Tag$2: case uint32Tag$2:
return cloneTypedArray(object, isDeep);
case mapTag$4:
return cloneMap(object);
case numberTag$3:
case stringTag$3:
return new Ctor(object);
case setTag$4:
return cloneSet(object);
case regexpTag$3:
return cloneRegExp(object);
}
}
/**
* Initializes an object clone.
*
* @private
* @param {Object} object The object to clone.
* @returns {Object} Returns the initialized clone.
*/
function initCloneObject(object) {
var Ctor = object.constructor;
return (typeof Ctor == 'function' && Ctor instanceof Ctor) ? new Ctor : {};
}
var argsTag$2 = '[object Arguments]';
var arrayTag$1 = '[object Array]';
var boolTag$2 = '[object Boolean]';
var dateTag$2 = '[object Date]';
var errorTag$2 = '[object Error]';
var funcTag$2 = '[object Function]';
var mapTag$2 = '[object Map]';
var numberTag$2 = '[object Number]';
var objectTag$2 = '[object Object]';
var regexpTag$2 = '[object RegExp]';
var setTag$2 = '[object Set]';
var stringTag$2 = '[object String]';
var weakMapTag$1 = '[object WeakMap]';
var arrayBufferTag$1 = '[object ArrayBuffer]';
var float32Tag$1 = '[object Float32Array]';
var float64Tag$1 = '[object Float64Array]';
var int8Tag$1 = '[object Int8Array]';
var int16Tag$1 = '[object Int16Array]';
var int32Tag$1 = '[object Int32Array]';
var uint8Tag$1 = '[object Uint8Array]';
var uint8ClampedTag$1 = '[object Uint8ClampedArray]';
var uint16Tag$1 = '[object Uint16Array]';
var uint32Tag$1 = '[object Uint32Array]';
/** Used to identify `toStringTag` values supported by `_.clone`. */
var cloneableTags = {};
cloneableTags[argsTag$2] = cloneableTags[arrayTag$1] =
cloneableTags[arrayBufferTag$1] = cloneableTags[boolTag$2] =
cloneableTags[dateTag$2] = cloneableTags[float32Tag$1] =
cloneableTags[float64Tag$1] = cloneableTags[int8Tag$1] =
cloneableTags[int16Tag$1] = cloneableTags[int32Tag$1] =
cloneableTags[mapTag$2] = cloneableTags[numberTag$2] =
cloneableTags[objectTag$2] = cloneableTags[regexpTag$2] =
cloneableTags[setTag$2] = cloneableTags[stringTag$2] =
cloneableTags[uint8Tag$1] = cloneableTags[uint8ClampedTag$1] =
cloneableTags[uint16Tag$1] = cloneableTags[uint32Tag$1] = true;
cloneableTags[errorTag$2] = cloneableTags[funcTag$2] =
cloneableTags[weakMapTag$1] = false;
/**
* The base implementation of `_.clone` and `_.cloneDeep` which tracks
* traversed objects.
*
* @private
* @param {*} value The value to clone.
* @param {boolean} [isDeep] Specify a deep clone.
* @param {Function} [customizer] The function to customize cloning.
* @param {string} [key] The key of `value`.
* @param {Object} [object] The object `value` belongs to.
* @param {Array} [stack] Tracks traversed sources and their clone counterparts.
* @returns {*} Returns the cloned value.
*/
function baseClone(value, isDeep, customizer, key, object, stack) {
var result;
if (customizer) {
result = object ? customizer(value, key, object, stack) : customizer(value);
}
if (result !== undefined) {
return result;
}
if (!isObject(value)) {
return value;
}
var isArr = isArray(value);
if (isArr) {
result = initCloneArray(value);
if (!isDeep) {
return copyArray(value, result);
}
} else {
var tag = getTag$1(value),
isFunc = tag == funcTag$2;
if (tag == objectTag$2 || tag == argsTag$2 || (isFunc && !object)) {
if (isHostObject(value)) {
return object ? value : {};
}
result = initCloneObject(isFunc ? {} : value);
if (!isDeep) {
return baseAssign(result, value);
}
} else {
return cloneableTags[tag]
? initCloneByTag(value, tag, isDeep)
: (object ? value : {});
}
}
// Check for circular references and return its corresponding clone.
stack || (stack = new Stack);
var stacked = stack.get(value);
if (stacked) {
return stacked;
}
stack.set(value, result);
// Recursively populate clone (susceptible to call stack limits).
(isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
result[key] = baseClone(subValue, isDeep, customizer, key, value, stack);
});
return result;
}
/**
* Creates a shallow clone of `value`.
*
* **Note:** This method is loosely based on the
* [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm).
* The enumerable properties of `arguments` objects and objects created by
* constructors other than `Object` are cloned to plain `Object` objects. An
* empty object is returned for uncloneable values such as functions, DOM nodes,
* Maps, Sets, and WeakMaps.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to clone.
* @returns {*} Returns the cloned value.
* @example
*
* var users = [
* { 'user': 'barney' },
* { 'user': 'fred' }
* ];
*
* var shallow = _.clone(users);
* console.log(shallow[0] === users[0]);
* // => true
*/
function clone(value) {
return baseClone(value);
}
/**
* This method is like `_.clone` except that it recursively clones `value`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to recursively clone.
* @returns {*} Returns the deep cloned value.
* @example
*
* var users = [
* { 'user': 'barney' },
* { 'user': 'fred' }
* ];
*
* var deep = _.cloneDeep(users);
* console.log(deep[0] === users[0]);
* // => false
*/
function cloneDeep(value) {
return baseClone(value, true);
}
/**
* This method is like `_.cloneWith` except that it recursively clones `value`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to recursively clone.
* @param {Function} [customizer] The function to customize cloning.
* @returns {*} Returns the deep cloned value.
* @example
*
* function customizer(value) {
* if (_.isElement(value)) {
* return value.cloneNode(true);
* }
* }
*
* var el = _.cloneDeep(document.body, customizer);
*
* console.log(el === document.body);
* // => false
* console.log(el.nodeName);
* // => BODY
* console.log(el.childNodes.length);
* // => 20
*/
function cloneDeepWith(value, customizer) {
return baseClone(value, true, customizer);
}
/**
* This method is like `_.clone` except that it accepts `customizer` which
* is invoked to produce the cloned value. If `customizer` returns `undefined`
* cloning is handled by the method instead. The `customizer` is invoked with
* up to five arguments; (value [, index|key, object, stack]).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to clone.
* @param {Function} [customizer] The function to customize cloning.
* @returns {*} Returns the cloned value.
* @example
*
* function customizer(value) {
* if (_.isElement(value)) {
* return value.cloneNode(false);
* }
* }
*
* var el = _.clone(document.body, customizer);
*
* console.log(el === document.body);
* // => false
* console.log(el.nodeName);
* // => BODY
* console.log(el.childNodes.length);
* // => 0
*/
function cloneWith(value, customizer) {
return baseClone(value, false, customizer);
}
/**
* Executes the chained sequence and returns the wrapped result.
*
* @name commit
* @memberOf _
* @category Chain
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var array = [1, 2];
* var wrapped = _(array).push(3);
*
* console.log(array);
* // => [1, 2]
*
* wrapped = wrapped.commit();
* console.log(array);
* // => [1, 2, 3]
*
* wrapped.last();
* // => 3
*
* console.log(array);
* // => [1, 2, 3]
*/
function wrapperCommit() {
return new LodashWrapper(this.value(), this.__chain__);
}
/**
* Creates an array with all falsey values removed. The values `false`, `null`,
* `0`, `""`, `undefined`, and `NaN` are falsey.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to compact.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.compact([0, 1, false, 2, '', 3]);
* // => [1, 2, 3]
*/
function compact(array) {
var index = -1,
length = array ? array.length : 0,
resIndex = -1,
result = [];
while (++index < length) {
var value = array[index];
if (value) {
result[++resIndex] = value;
}
}
return result;
}
/**
* Creates a new array joining `array` with `other`.
*
* @private
* @param {Array} array The array to join.
* @param {Array} other The other array to join.
* @returns {Array} Returns the new concatenated array.
*/
function arrayConcat(array, other) {
var index = -1,
length = array.length,
othIndex = -1,
othLength = other.length,
result = Array(length + othLength);
while (++index < length) {
result[index] = array[index];
}
while (++othIndex < othLength) {
result[index++] = other[othIndex];
}
return result;
}
/**
* Creates a new array joining a wrapped array with any additional arrays
* and/or values.
*
* @name concat
* @memberOf _
* @category Chain
* @param {...*} [values] The values to concatenate.
* @returns {Array} Returns the new concatenated array.
* @example
*
* var array = [1];
* var wrapped = _(array).concat(2, [3], [[4]]);
*
* console.log(wrapped.value());
* // => [1, 2, 3, [4]]
*
* console.log(array);
* // => [1]
*/
var wrapperConcat = rest(function(values) {
values = baseFlatten(values);
return this.thru(function(array) {
return arrayConcat(isArray(array) ? array : [Object(array)], values);
});
});
/**
* Converts `iterator` to an array.
*
* @private
* @param {Object} iterator The iterator to convert.
* @returns {Array} Returns the converted array.
*/
function iteratorToArray(iterator) {
var data,
result = [];
while (!(data = iterator.next()).done) {
result.push(data.value);
}
return result;
}
/** Used for built-in method references. */
var objectProto$19 = Object.prototype;
/** Built-in value references. */
var Reflect = root.Reflect;
var enumerate = Reflect ? Reflect.enumerate : undefined;
var propertyIsEnumerable$1 = objectProto$19.propertyIsEnumerable;
/**
* The base implementation of `_.keysIn` which doesn't skip the constructor
* property of prototypes or treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeysIn(object) {
object = object == null ? object : Object(object);
var result = [];
for (var key in object) {
result.push(key);
}
return result;
}
// Fallback for IE < 9 with es6-shim.
if (enumerate && !propertyIsEnumerable$1.call({ 'valueOf': 1 }, 'valueOf')) {
baseKeysIn = function(object) {
return iteratorToArray(enumerate(object));
};
}
var baseKeysIn$1 = baseKeysIn;
/** Used for built-in method references. */
var objectProto$14 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$5 = objectProto$14.hasOwnProperty;
/**
* Creates an array of the own and inherited enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keysIn(new Foo);
* // => ['a', 'b', 'c'] (iteration order is not guaranteed)
*/
function keysIn(object) {
var index = -1,
isProto = isPrototype(object),
props = baseKeysIn$1(object),
propsLength = props.length,
result = initKeys(object),
length = result.length,
skipIndexes = !!length;
while (++index < propsLength) {
var key = props[index];
if (!(skipIndexes && isIndex(key, length)) &&
!(key == 'constructor' && (isProto || !hasOwnProperty$5.call(object, key)))) {
result.push(key);
}
}
return result;
}
/**
* The base implementation of `_.conforms` which doesn't clone `source`.
*
* @private
* @param {Object} source The object of property predicates to conform to.
* @returns {Function} Returns the new function.
*/
function baseConforms(source) {
var props = keysIn(source),
length = props.length;
return function(object) {
if (object == null) {
return !length;
}
var index = length;
while (index--) {
var key = props[index],
predicate = source[key],
value = object[key];
if ((value === undefined && !(key in Object(object))) || !predicate(value)) {
return false;
}
}
return true;
};
}
/**
* Creates a function that invokes the predicate properties of `source` with
* the corresponding property values of a given object, returning `true` if
* all predicates return truthy, else `false`.
*
* @static
* @memberOf _
* @category Utility
* @param {Object} source The object of property predicates to conform to.
* @returns {Function} Returns the new function.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* _.filter(users, _.conforms({ 'age': _.partial(_.gt, _, 38) }));
* // => [{ 'user': 'fred', 'age': 40 }]
*/
function conforms(source) {
return baseConforms(baseClone(source, true));
}
/**
* A specialized version of `_.every` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`.
*/
function arrayEvery(array, predicate) {
var index = -1,
length = array.length;
while (++index < length) {
if (!predicate(array[index], index, array)) {
return false;
}
}
return true;
}
/**
* A specialized version of `_.map` for arrays without support for callback
* shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function arrayMap(array, iteratee) {
var index = -1,
length = array.length,
result = Array(length);
while (++index < length) {
result[index] = iteratee(array[index], index, array);
}
return result;
}
/**
* A specialized version of `_.some` for arrays without support for callback
* shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
*/
function arraySome(array, predicate) {
var index = -1,
length = array.length;
while (++index < length) {
if (predicate(array[index], index, array)) {
return true;
}
}
return false;
}
var UNORDERED_COMPARE_FLAG$2 = 1;
var PARTIAL_COMPARE_FLAG$3 = 2;
/**
* A specialized version of `baseIsEqualDeep` for arrays with support for
* partial deep comparisons.
*
* @private
* @param {Array} array The array to compare.
* @param {Array} other The other array to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
* @param {Array} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
*/
function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
var index = -1,
isPartial = bitmask & PARTIAL_COMPARE_FLAG$3,
isUnordered = bitmask & UNORDERED_COMPARE_FLAG$2,
arrLength = array.length,
othLength = other.length;
if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
return false;
}
// Ignore non-index properties.
while (++index < arrLength) {
var arrValue = array[index],
othValue = other[index];
if (customizer) {
var result = isPartial
? customizer(othValue, arrValue, index, other, array, stack)
: customizer(arrValue, othValue, index, array, other, stack);
}
if (result !== undefined) {
if (result) {
continue;
}
return false;
}
// Recursively compare arrays (susceptible to call stack limits).
if (isUnordered) {
if (!arraySome(other, function(othValue) {
return arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack);
})) {
return false;
}
} else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
return false;
}
}
return true;
}
var UNORDERED_COMPARE_FLAG$3 = 1;
var PARTIAL_COMPARE_FLAG$4 = 2;
var boolTag$4 = '[object Boolean]';
var dateTag$4 = '[object Date]';
var errorTag$3 = '[object Error]';
var mapTag$5 = '[object Map]';
var numberTag$4 = '[object Number]';
var regexpTag$4 = '[object RegExp]';
var setTag$5 = '[object Set]';
var stringTag$4 = '[object String]';
/**
* A specialized version of `baseIsEqualDeep` for comparing objects of
* the same `toStringTag`.
*
* **Note:** This function only supports comparing values with tags of
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {string} tag The `toStringTag` of the objects to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function equalByTag(object, other, tag, equalFunc, customizer, bitmask) {
switch (tag) {
case boolTag$4:
case dateTag$4:
// Coerce dates and booleans to numbers, dates to milliseconds and booleans
// to `1` or `0` treating invalid dates coerced to `NaN` as not equal.
return +object == +other;
case errorTag$3:
return object.name == other.name && object.message == other.message;
case numberTag$4:
// Treat `NaN` vs. `NaN` as equal.
return (object != +object) ? other != +other : object == +other;
case regexpTag$4:
case stringTag$4:
// Coerce regexes to strings and treat strings primitives and string
// objects as equal. See https://es5.github.io/#x15.10.6.4 for more details.
return object == (other + '');
case mapTag$5:
var convert = mapToArray;
case setTag$5:
var isPartial = bitmask & PARTIAL_COMPARE_FLAG$4;
convert || (convert = setToArray);
// Recursively compare objects (susceptible to call stack limits).
return (isPartial || object.size == other.size) &&
equalFunc(convert(object), convert(other), customizer, bitmask | UNORDERED_COMPARE_FLAG$3);
}
return false;
}
var UNORDERED_COMPARE_FLAG$4 = 1;
var PARTIAL_COMPARE_FLAG$5 = 2;
/**
* A specialized version of `baseIsEqualDeep` for objects with support for
* partial deep comparisons.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
* @param {Array} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
var isPartial = bitmask & PARTIAL_COMPARE_FLAG$5,
isUnordered = bitmask & UNORDERED_COMPARE_FLAG$4,
objProps = keys(object),
objLength = objProps.length,
othProps = keys(other),
othLength = othProps.length;
if (objLength != othLength && !isPartial) {
return false;
}
var index = objLength;
while (index--) {
var key = objProps[index];
if (!(isPartial ? key in other : baseHas(other, key)) ||
!(isUnordered || key == othProps[index])) {
return false;
}
}
var skipCtor = isPartial;
while (++index < objLength) {
key = objProps[index];
var objValue = object[key],
othValue = other[key];
if (customizer) {
var result = isPartial
? customizer(othValue, objValue, key, other, object, stack)
: customizer(objValue, othValue, key, object, other, stack);
}
// Recursively compare objects (susceptible to call stack limits).
if (!(result === undefined
? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
: result
)) {
return false;
}
skipCtor || (skipCtor = key == 'constructor');
}
if (!skipCtor) {
var objCtor = object.constructor,
othCtor = other.constructor;
// Non `Object` object instances with different constructors are not equal.
if (objCtor != othCtor &&
('constructor' in object && 'constructor' in other) &&
!(typeof objCtor == 'function' && objCtor instanceof objCtor &&
typeof othCtor == 'function' && othCtor instanceof othCtor)) {
return false;
}
}
return true;
}
var argsTag$1 = '[object Arguments]';
var arrayTag = '[object Array]';
var boolTag$1 = '[object Boolean]';
var dateTag$1 = '[object Date]';
var errorTag$1 = '[object Error]';
var funcTag$1 = '[object Function]';
var mapTag = '[object Map]';
var numberTag$1 = '[object Number]';
var objectTag$1 = '[object Object]';
var regexpTag$1 = '[object RegExp]';
var setTag = '[object Set]';
var stringTag$1 = '[object String]';
var weakMapTag = '[object WeakMap]';
var arrayBufferTag = '[object ArrayBuffer]';
var float32Tag = '[object Float32Array]';
var float64Tag = '[object Float64Array]';
var int8Tag = '[object Int8Array]';
var int16Tag = '[object Int16Array]';
var int32Tag = '[object Int32Array]';
var uint8Tag = '[object Uint8Array]';
var uint8ClampedTag = '[object Uint8ClampedArray]';
var uint16Tag = '[object Uint16Array]';
var uint32Tag = '[object Uint32Array]';
/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag$1] =
typedArrayTags[dateTag$1] = typedArrayTags[errorTag$1] =
typedArrayTags[funcTag$1] = typedArrayTags[mapTag] =
typedArrayTags[numberTag$1] = typedArrayTags[objectTag$1] =
typedArrayTags[regexpTag$1] = typedArrayTags[setTag] =
typedArrayTags[stringTag$1] = typedArrayTags[weakMapTag] = false;
/** Used for built-in method references. */
var objectProto$13 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$9 = objectProto$13.toString;
/**
* Checks if `value` is classified as a typed array.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isTypedArray(new Uint8Array);
* // => true
*
* _.isTypedArray([]);
* // => false
*/
function isTypedArray(value) {
return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[objToString$9.call(value)];
}
/** Used to compose bitmasks for comparison styles. */
var PARTIAL_COMPARE_FLAG$2 = 2;
/** `Object#toString` result references. */
var argsTag$3 = '[object Arguments]';
var arrayTag$2 = '[object Array]';
var objectTag$4 = '[object Object]';
/** Used for built-in method references. */
var objectProto$22 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$10 = objectProto$22.hasOwnProperty;
/**
* A specialized version of `baseIsEqual` for arrays and objects which performs
* deep comparisons and tracks traversed objects enabling objects with circular
* references to be compared.
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {Function} equalFunc The function to determine equivalents of values.
* @param {Function} [customizer] The function to customize comparisons.
* @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
* @param {Array} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
*/
function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
var objIsArr = isArray(object),
othIsArr = isArray(other),
objTag = arrayTag$2,
othTag = arrayTag$2;
if (!objIsArr) {
objTag = getTag$1(object);
if (objTag == argsTag$3) {
objTag = objectTag$4;
} else if (objTag != objectTag$4) {
objIsArr = isTypedArray(object);
}
}
if (!othIsArr) {
othTag = getTag$1(other);
if (othTag == argsTag$3) {
othTag = objectTag$4;
} else if (othTag != objectTag$4) {
othIsArr = isTypedArray(other);
}
}
var objIsObj = objTag == objectTag$4 && !isHostObject(object),
othIsObj = othTag == objectTag$4 && !isHostObject(other),
isSameTag = objTag == othTag;
if (isSameTag && !(objIsArr || objIsObj)) {
return equalByTag(object, other, objTag, equalFunc, customizer, bitmask);
}
var isPartial = bitmask & PARTIAL_COMPARE_FLAG$2;
if (!isPartial) {
var objIsWrapped = objIsObj && hasOwnProperty$10.call(object, '__wrapped__'),
othIsWrapped = othIsObj && hasOwnProperty$10.call(other, '__wrapped__');
if (objIsWrapped || othIsWrapped) {
return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
}
}
if (!isSameTag) {
return false;
}
// Assume cyclic values are equal.
// For more information on detecting circular references see https://es5.github.io/#JO.
stack || (stack = new Stack);
var stacked = stack.get(object);
if (stacked) {
return stacked == other;
}
stack.set(object, other);
var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, bitmask, stack);
stack['delete'](object);
return result;
}
/**
* The base implementation of `_.isEqual` which supports partial comparisons
* and tracks traversed objects.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @param {Function} [customizer] The function to customize comparisons.
* @param {boolean} [bitmask] The bitmask of comparison flags.
* The bitmask may be composed of the following flags:
* 1 - Unordered comparison
* 2 - Partial comparison
* @param {Array} [stack] Tracks traversed `value` and `other` objects.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
*/
function baseIsEqual(value, other, customizer, bitmask, stack) {
if (value === other) {
return true;
}
if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
return value !== value && other !== other;
}
return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
}
var UNORDERED_COMPARE_FLAG = 1;
var PARTIAL_COMPARE_FLAG = 2;
/**
* The base implementation of `_.isMatch` without support for callback shorthands.
*
* @private
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @param {Array} matchData The property names, values, and compare flags to match.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
*/
function baseIsMatch(object, source, matchData, customizer) {
var index = matchData.length,
length = index,
noCustomizer = !customizer;
if (object == null) {
return !length;
}
object = Object(object);
while (index--) {
var data = matchData[index];
if ((noCustomizer && data[2])
? data[1] !== object[data[0]]
: !(data[0] in object)
) {
return false;
}
}
while (++index < length) {
data = matchData[index];
var key = data[0],
objValue = object[key],
srcValue = data[1];
if (noCustomizer && data[2]) {
if (objValue === undefined && !(key in object)) {
return false;
}
} else {
var stack = new Stack,
result = customizer ? customizer(objValue, srcValue, key, object, source, stack) : undefined;
if (!(result === undefined ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack) : result)) {
return false;
}
}
}
return true;
}
/**
* Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` if suitable for strict
* equality comparisons, else `false`.
*/
function isStrictComparable(value) {
return value === value && !isObject(value);
}
/**
* Creates an array of the key-value pairs for `object`,
* e.g. `[[key1, value1], [key2, value2]]`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the new array of key-value pairs.
* @example
*
* _.pairs({ 'barney': 36, 'fred': 40 });
* // => [['barney', 36], ['fred', 40]] (iteration order is not guaranteed)
*/
function pairs(object) {
return arrayMap(keys(object), function(key) {
return [key, object[key]];
});
}
/**
* Gets the property names, values, and compare flags of `object`.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the match data of `object`.
*/
function getMatchData(object) {
var result = pairs(object),
length = result.length;
while (length--) {
result[length][2] = isStrictComparable(result[length][1]);
}
return result;
}
/**
* The base implementation of `_.matches` which doesn't clone `source`.
*
* @private
* @param {Object} source The object of property values to match.
* @returns {Function} Returns the new function.
*/
function baseMatches(source) {
var matchData = getMatchData(source);
if (matchData.length == 1 && matchData[0][2]) {
var key = matchData[0][0],
value = matchData[0][1];
return function(object) {
if (object == null) {
return false;
}
return object[key] === value &&
(value !== undefined || (key in Object(object)));
};
}
return function(object) {
return object === source || baseIsMatch(object, source, matchData);
};
}
/**
* The base implementation of `_.hasIn` without support for deep paths.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} key The key to check.
* @returns {boolean} Returns `true` if `key` exists, else `false`.
*/
function baseHasIn(object, key) {
return key in Object(object);
}
/**
* Gets the last element of `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @returns {*} Returns the last element of `array`.
* @example
*
* _.last([1, 2, 3]);
* // => 3
*/
function last(array) {
var length = array ? array.length : 0;
return length ? array[length - 1] : undefined;
}
/**
* Gets the parent value at `path` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} path The path to get the parent value of.
* @returns {*} Returns the parent value.
*/
function parent$1(object, path) {
return path.length == 1 ? object : get(object, baseSlice(path, 0, -1));
}
/**
* Checks if `path` exists on `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @param {Function} hasFunc The function to check properties.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
*/
function hasPath(object, path, hasFunc) {
if (object == null) {
return false;
}
var result = hasFunc(object, path);
if (!result && !isKey(path)) {
path = baseToPath(path);
object = parent$1(object, path);
if (object != null) {
path = last(path);
result = hasFunc(object, path);
}
}
return result || (isLength(object && object.length) && isIndex(path, object.length) &&
(isArray(object) || isString(object) || isArguments(object)));
}
/**
* Checks if `path` is a direct or inherited property of `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
* @example
*
* var object = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) });
*
* _.hasIn(object, 'a');
* // => true
*
* _.hasIn(object, 'a.b.c');
* // => true
*
* _.hasIn(object, ['a', 'b', 'c']);
* // => true
*
* _.hasIn(object, 'b');
* // => false
*/
function hasIn(object, path) {
return hasPath(object, path, baseHasIn);
}
var UNORDERED_COMPARE_FLAG$1 = 1;
var PARTIAL_COMPARE_FLAG$1 = 2;
/**
* The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
*
* @private
* @param {string} path The path of the property to get.
* @param {*} srcValue The value to match.
* @returns {Function} Returns the new function.
*/
function baseMatchesProperty(path, srcValue) {
return function(object) {
var objValue = get(object, path);
return (objValue === undefined && objValue === srcValue)
? hasIn(object, path)
: baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG$1 | PARTIAL_COMPARE_FLAG$1);
};
}
/**
* A specialized version of `baseProperty` which supports deep paths.
*
* @private
* @param {Array|string} path The path of the property to get.
* @returns {Function} Returns the new function.
*/
function basePropertyDeep(path) {
return function(object) {
return baseGet(object, path);
};
}
/**
* Creates a function that returns the value at `path` of a given object.
*
* @static
* @memberOf _
* @category Utility
* @param {Array|string} path The path of the property to get.
* @returns {Function} Returns the new function.
* @example
*
* var objects = [
* { 'a': { 'b': { 'c': 2 } } },
* { 'a': { 'b': { 'c': 1 } } }
* ];
*
* _.map(objects, _.property('a.b.c'));
* // => [2, 1]
*
* _.map(_.sortBy(objects, _.property(['a', 'b', 'c'])), 'a.b.c');
* // => [1, 2]
*/
function property(path) {
return isKey(path) ? baseProperty(path) : basePropertyDeep(path);
}
/**
* The base implementation of `_.iteratee`.
*
* @private
* @param {*} [value=_.identity] The value to convert to an iteratee.
* @returns {Function} Returns the iteratee.
*/
function baseIteratee(value) {
var type = typeof value;
if (type == 'function') {
return value;
}
if (value == null) {
return identity;
}
if (type == 'object') {
return isArray(value)
? baseMatchesProperty(value[0], value[1])
: baseMatches(value);
}
return property(value);
}
/**
* Creates a function like `_.conj`.
*
* @private
* @param {Function} arrayFunc The function to iterate over iteratees.
* @returns {Function} Returns the new invoker function.
*/
function createInvoker(arrayFunc) {
return rest(function(iteratees) {
iteratees = arrayMap(baseFlatten(iteratees), baseIteratee);
return rest(function(args) {
var thisArg = this;
return arrayFunc(iteratees, function(iteratee) {
return iteratee.apply(thisArg, args);
});
});
});
}
/**
* Creates a function that checks if **all** of the `predicates` return
* truthy when invoked with the arguments provided to the created function.
*
* @static
* @memberOf _
* @category Utility
* @param {...(Function|Function[])} predicates The predicates to check.
* @returns {Function} Returns the new function.
* @example
*
* var conjed = _.conj(Boolean, isFinite);
*
* conjed('1');
* // => true
*
* conjed(null);
* // => false
*
* conjed(NaN);
* // => false
*/
var conj = createInvoker(arrayEvery);
/**
* Creates a function that returns `value`.
*
* @static
* @memberOf _
* @category Utility
* @param {*} value The value to return from the new function.
* @returns {Function} Returns the new function.
* @example
*
* var object = { 'user': 'fred' };
* var getter = _.constant(object);
*
* getter() === object;
* // => true
*/
function constant(value) {
return function() {
return value;
};
}
/**
* Creates a `baseEach` or `baseEachRight` function.
*
* @private
* @param {Function} eachFunc The function to iterate over a collection.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new base function.
*/
function createBaseEach(eachFunc, fromRight) {
return function(collection, iteratee) {
if (collection == null) {
return collection;
}
if (!isArrayLike(collection)) {
return eachFunc(collection, iteratee);
}
var length = collection.length,
index = fromRight ? length : -1,
iterable = Object(collection);
while ((fromRight ? index-- : ++index < length)) {
if (iteratee(iterable[index], index, iterable) === false) {
break;
}
}
return collection;
};
}
/**
* The base implementation of `_.forEach` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
*/
var baseEach = createBaseEach(baseForOwn);
/**
* Creates a function like `_.groupBy`.
*
* @private
* @param {Function} setter The function to set keys and values of the accumulator object.
* @param {Function} [initializer] The function to initialize the accumulator object.
* @returns {Function} Returns the new aggregator function.
*/
function createAggregator(setter, initializer) {
return function(collection, iteratee) {
var result = initializer ? initializer() : {};
iteratee = baseIteratee(iteratee);
if (isArray(collection)) {
var index = -1,
length = collection.length;
while (++index < length) {
var value = collection[index];
setter(result, value, iteratee(value), collection);
}
} else {
baseEach(collection, function(value, key, collection) {
setter(result, value, iteratee(value), collection);
});
}
return result;
};
}
/** Used for built-in method references. */
var objectProto = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` through `iteratee`. The corresponding value
* of each key is the number of times the key was returned by `iteratee`.
* The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* _.countBy([6.1, 4.2, 6.3], Math.floor);
* // => { '4': 1, '6': 2 }
*
* _.countBy(['one', 'two', 'three'], 'length');
* // => { '3': 2, '5': 1 }
*/
var countBy = createAggregator(function(result, value, key) {
hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
});
/**
* Creates an object that inherits from the given `prototype` object. If a
* `properties` object is provided its own enumerable properties are assigned
* to the created object.
*
* @static
* @memberOf _
* @category Object
* @param {Object} prototype The object to inherit from.
* @param {Object} [properties] The properties to assign to the object.
* @returns {Object} Returns the new object.
* @example
*
* function Shape() {
* this.x = 0;
* this.y = 0;
* }
*
* function Circle() {
* Shape.call(this);
* }
*
* Circle.prototype = _.create(Shape.prototype, {
* 'constructor': Circle
* });
*
* var circle = new Circle;
* circle instanceof Circle;
* // => true
*
* circle instanceof Shape;
* // => true
*/
function create(prototype, properties) {
var result = baseCreate(prototype);
return properties ? baseAssign(result, properties) : result;
}
/** Used to compose bitmasks for wrapper metadata. */
var CURRY_FLAG = 8;
/**
* Creates a function that accepts one or more arguments of `func` that when
* called either invokes `func` returning its result, if all `func` arguments
* have been provided, or returns a function that accepts one or more of the
* remaining `func` arguments, and so on. The arity of `func` may be specified
* if `func.length` is not sufficient.
*
* The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
* may be used as a placeholder for provided arguments.
*
* **Note:** This method doesn't set the "length" property of curried functions.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to curry.
* @param {number} [arity=func.length] The arity of `func`.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Function} Returns the new curried function.
* @example
*
* var abc = function(a, b, c) {
* return [a, b, c];
* };
*
* var curried = _.curry(abc);
*
* curried(1)(2)(3);
* // => [1, 2, 3]
*
* curried(1, 2)(3);
* // => [1, 2, 3]
*
* curried(1, 2, 3);
* // => [1, 2, 3]
*
* // using placeholders
* curried(1)(_, 3)(2);
* // => [1, 2, 3]
*/
function curry(func, arity, guard) {
arity = guard ? undefined : arity;
var result = createWrapper(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
result.placeholder = curry.placeholder;
return result;
}
/** Used to compose bitmasks for wrapper metadata. */
var CURRY_RIGHT_FLAG = 16;
/**
* This method is like `_.curry` except that arguments are applied to `func`
* in the manner of `_.partialRight` instead of `_.partial`.
*
* The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for provided arguments.
*
* **Note:** This method doesn't set the "length" property of curried functions.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to curry.
* @param {number} [arity=func.length] The arity of `func`.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Function} Returns the new curried function.
* @example
*
* var abc = function(a, b, c) {
* return [a, b, c];
* };
*
* var curried = _.curryRight(abc);
*
* curried(3)(2)(1);
* // => [1, 2, 3]
*
* curried(2, 3)(1);
* // => [1, 2, 3]
*
* curried(1, 2, 3);
* // => [1, 2, 3]
*
* // using placeholders
* curried(3)(1, _)(2);
* // => [1, 2, 3]
*/
function curryRight(func, arity, guard) {
arity = guard ? undefined : arity;
var result = createWrapper(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
result.placeholder = curryRight.placeholder;
return result;
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$2 = 'Expected a function';
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$1 = Math.max;
/**
* Creates a debounced function that delays invoking `func` until after `wait`
* milliseconds have elapsed since the last time the debounced function was
* invoked. The debounced function comes with a `cancel` method to cancel
* delayed `func` invocations and a `flush` method to immediately invoke them.
* Provide an options object to indicate that `func` should be invoked on the
* leading and/or trailing edge of the `wait` timeout. Subsequent calls to the
* debounced function return the result of the last `func` invocation.
*
* **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
* on the trailing edge of the timeout only if the the debounced function is
* invoked more than once during the `wait` timeout.
*
* See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
* for details over the differences between `_.debounce` and `_.throttle`.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to debounce.
* @param {number} [wait=0] The number of milliseconds to delay.
* @param {Object} [options] The options object.
* @param {boolean} [options.leading=false] Specify invoking on the leading
* edge of the timeout.
* @param {number} [options.maxWait] The maximum time `func` is allowed to be
* delayed before it's invoked.
* @param {boolean} [options.trailing=true] Specify invoking on the trailing
* edge of the timeout.
* @returns {Function} Returns the new debounced function.
* @example
*
* // avoid costly calculations while the window size is in flux
* jQuery(window).on('resize', _.debounce(calculateLayout, 150));
*
* // invoke `sendMail` when the click event is fired, debouncing subsequent calls
* jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
* 'leading': true,
* 'trailing': false
* }));
*
* // ensure `batchLog` is invoked once after 1 second of debounced calls
* var source = new EventSource('/stream');
* jQuery(source).on('message', _.debounce(batchLog, 250, {
* 'maxWait': 1000
* }));
*
* // cancel a debounced call
* var todoChanges = _.debounce(batchLog, 1000);
* Object.observe(models.todo, todoChanges);
*
* Object.observe(models, function(changes) {
* if (_.find(changes, { 'user': 'todo', 'type': 'delete'})) {
* todoChanges.cancel();
* }
* }, ['delete']);
*
* // ...at some point `models.todo` is changed
* models.todo.completed = true;
*
* // ...before 1 second has passed `models.todo` is deleted
* // which cancels the debounced `todoChanges` call
* delete models.todo;
*/
function debounce(func, wait, options) {
var args,
maxTimeoutId,
result,
stamp,
thisArg,
timeoutId,
trailingCall,
lastCalled = 0,
leading = false,
maxWait = false,
trailing = true;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$2);
}
wait = wait < 0 ? 0 : (+wait || 0);
if (isObject(options)) {
leading = !!options.leading;
maxWait = 'maxWait' in options && nativeMax$1(+options.maxWait || 0, wait);
trailing = 'trailing' in options ? !!options.trailing : trailing;
}
function cancel() {
if (timeoutId) {
clearTimeout(timeoutId);
}
if (maxTimeoutId) {
clearTimeout(maxTimeoutId);
}
lastCalled = 0;
args = maxTimeoutId = thisArg = timeoutId = trailingCall = undefined;
}
function complete(isCalled, id) {
if (id) {
clearTimeout(id);
}
maxTimeoutId = timeoutId = trailingCall = undefined;
if (isCalled) {
lastCalled = now();
result = func.apply(thisArg, args);
if (!timeoutId && !maxTimeoutId) {
args = thisArg = undefined;
}
}
}
function delayed() {
var remaining = wait - (now() - stamp);
if (remaining <= 0 || remaining > wait) {
complete(trailingCall, maxTimeoutId);
} else {
timeoutId = setTimeout(delayed, remaining);
}
}
function flush() {
if ((timeoutId && trailingCall) || (maxTimeoutId && trailing)) {
result = func.apply(thisArg, args);
}
cancel();
return result;
}
function maxDelayed() {
complete(trailing, timeoutId);
}
function debounced() {
args = arguments;
stamp = now();
thisArg = this;
trailingCall = trailing && (timeoutId || !leading);
if (maxWait === false) {
var leadingCall = leading && !timeoutId;
} else {
if (!maxTimeoutId && !leading) {
lastCalled = stamp;
}
var remaining = maxWait - (stamp - lastCalled),
isCalled = remaining <= 0 || remaining > maxWait;
if (isCalled) {
if (maxTimeoutId) {
maxTimeoutId = clearTimeout(maxTimeoutId);
}
lastCalled = stamp;
result = func.apply(thisArg, args);
}
else if (!maxTimeoutId) {
maxTimeoutId = setTimeout(maxDelayed, remaining);
}
}
if (isCalled && timeoutId) {
timeoutId = clearTimeout(timeoutId);
}
else if (!timeoutId && wait !== maxWait) {
timeoutId = setTimeout(delayed, wait);
}
if (leadingCall) {
isCalled = true;
result = func.apply(thisArg, args);
}
if (isCalled && !timeoutId && !maxTimeoutId) {
args = thisArg = undefined;
}
return result;
}
debounced.cancel = cancel;
debounced.flush = flush;
return debounced;
}
/**
* Used by `_.defaults` to customize its `_.assign` use.
*
* @private
* @param {*} objValue The destination object property value.
* @param {*} srcValue The source object property value.
* @returns {*} Returns the value to assign to the destination object.
*/
function extendDefaults(objValue, srcValue) {
return objValue === undefined ? srcValue : objValue;
}
/**
* This method is like `_.assignWith` except that it iterates over own and
* inherited source properties.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(objValue, srcValue) {
* return _.isUndefined(objValue) ? srcValue : objValue;
* }
*
* var defaults = _.partialRight(_.extendWith, customizer);
*
* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
* // => { 'a': 1, 'b': 2 }
*/
var extendWith = createAssigner(function(object, source, customizer) {
copyObjectWith(source, keysIn(source), object, customizer);
});
/**
* Assigns own and inherited enumerable properties of source objects to the
* destination object for all destination properties that resolve to `undefined`.
* Source objects are applied from left to right. Once a property is set,
* additional values of the same property are ignored.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
* // => { 'user': 'barney', 'age': 36 }
*/
var defaults = rest(function(args) {
args.push(undefined, extendDefaults);
return extendWith.apply(undefined, args);
});
/**
* This function is like `assignValue` except that it doesn't assign `undefined` values.
*
* @private
* @param {Object} object The object to modify.
* @param {string} key The key of the property to assign.
* @param {*} value The value to assign.
*/
function assignMergeValue(object, key, value) {
var oldValue = object[key];
if ((value !== undefined &&
(value === value ? (value !== oldValue) : (oldValue === oldValue))) ||
(typeof key == 'number' &&
value === undefined && !(key in object))) {
object[key] = value;
}
}
/** `Object#toString` result references. */
var objectTag = '[object Object]';
/** Used for built-in method references. */
var objectProto$10 = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var fnToString$1 = Function.prototype.toString;
/** Used to infer the `Object` constructor. */
var objCtorString = fnToString$1.call(Object);
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$6 = objectProto$10.toString;
/** Built-in value references. */
var getPrototypeOf = Object.getPrototypeOf;
/**
* Checks if `value` is a plain object, that is, an object created by the
* `Object` constructor or one with a `[[Prototype]]` of `null`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* _.isPlainObject(new Foo);
* // => false
*
* _.isPlainObject([1, 2, 3]);
* // => false
*
* _.isPlainObject({ 'x': 0, 'y': 0 });
* // => true
*
* _.isPlainObject(Object.create(null));
* // => true
*/
function isPlainObject(value) {
if (!isObjectLike(value) || objToString$6.call(value) != objectTag || isHostObject(value)) {
return false;
}
var proto = objectProto$10;
if (typeof value.constructor == 'function') {
proto = getPrototypeOf(value);
}
if (proto === null) {
return true;
}
var Ctor = proto.constructor;
return (typeof Ctor == 'function' &&
Ctor instanceof Ctor && fnToString$1.call(Ctor) == objCtorString);
}
/**
* Converts `value` to a plain object flattening inherited enumerable
* properties of `value` to own properties of the plain object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to convert.
* @returns {Object} Returns the converted plain object.
* @example
*
* function Foo() {
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.assign({ 'a': 1 }, new Foo);
* // => { 'a': 1, 'b': 2 }
*
* _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
* // => { 'a': 1, 'b': 2, 'c': 3 }
*/
function toPlainObject(value) {
return copyObject(value, keysIn(value));
}
/**
* A specialized version of `baseMerge` for arrays and objects which performs
* deep merges and tracks traversed objects enabling objects with circular
* references to be merged.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @param {string} key The key of the value to merge.
* @param {Function} mergeFunc The function to merge values.
* @param {Function} [customizer] The function to customize assigned values.
* @param {Array} [stack] Tracks traversed sources and their value counterparts.
*/
function baseMergeDeep(object, source, key, mergeFunc, customizer, stack) {
var oldValue = object[key],
srcValue = source[key],
stacked = stack.get(oldValue) || stack.get(srcValue);
if (stacked) {
assignMergeValue(object, key, stacked);
return;
}
var newValue = customizer ? customizer(oldValue, srcValue, (key + ''), object, source, stack) : undefined,
isCommon = newValue === undefined;
if (isCommon) {
newValue = srcValue;
if (isArray(srcValue) || isTypedArray(srcValue)) {
newValue = isArray(oldValue)
? oldValue
: ((isArrayLikeObject(oldValue)) ? copyArray(oldValue) : baseClone(srcValue));
}
else if (isPlainObject(srcValue) || isArguments(srcValue)) {
newValue = isArguments(oldValue)
? toPlainObject(oldValue)
: (isObject(oldValue) ? oldValue : baseClone(srcValue));
}
else {
isCommon = isFunction(srcValue);
}
}
stack.set(srcValue, newValue);
if (isCommon) {
// Recursively merge objects and arrays (susceptible to call stack limits).
mergeFunc(newValue, srcValue, customizer, stack);
}
assignMergeValue(object, key, newValue);
}
/**
* The base implementation of `_.merge` without support for multiple sources.
*
* @private
* @param {Object} object The destination object.
* @param {Object} source The source object.
* @param {Function} [customizer] The function to customize merged values.
* @param {Array} [stack] Tracks traversed sources and their value counterparts.
*/
function baseMerge(object, source, customizer, stack) {
if (object === source) {
return;
}
var props = (isArray(source) || isTypedArray(source)) ? undefined : keysIn(source);
arrayEach(props || source, function(srcValue, key) {
if (props) {
key = srcValue;
srcValue = source[key];
}
if (isObject(srcValue)) {
stack || (stack = new Stack);
baseMergeDeep(object, source, key, baseMerge, customizer, stack);
}
else {
var newValue = customizer ? customizer(object[key], srcValue, (key + ''), object, source, stack) : undefined;
if (newValue === undefined) {
newValue = srcValue;
}
assignMergeValue(object, key, newValue);
}
});
}
/**
* Used by `_.defaultsDeep` to customize its `_.merge` use.
*
* @private
* @param {*} objValue The destination object property value.
* @param {*} srcValue The source object property value.
* @returns {*} Returns the value to assign to the destination object.
*/
function mergeDefaults(objValue, srcValue, key, object, source, stack) {
if (isObject(objValue) && isObject(srcValue)) {
stack.set(srcValue, objValue);
baseMerge(objValue, srcValue, mergeDefaults, stack);
}
return objValue === undefined ? baseClone(srcValue) : objValue;
}
/**
* This method is like `_.merge` except that it accepts `customizer` which
* is invoked to produce the merged values of the destination and source
* properties. If `customizer` returns `undefined` merging is handled by the
* method instead. The `customizer` is invoked with seven arguments:
* (objValue, srcValue, key, object, source, stack).
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} sources The source objects.
* @param {Function} customizer The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(objValue, srcValue) {
* if (_.isArray(objValue)) {
* return objValue.concat(srcValue);
* }
* }
*
* var object = {
* 'fruits': ['apple'],
* 'vegetables': ['beet']
* };
*
* var other = {
* 'fruits': ['banana'],
* 'vegetables': ['carrot']
* };
*
* _.mergeWith(object, other, customizer);
* // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
*/
var mergeWith = createAssigner(function(object, source, customizer) {
baseMerge(object, source, customizer);
});
/**
* This method is like `_.defaults` except that it recursively assigns
* default properties.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
* // => { 'user': { 'name': 'barney', 'age': 36 } }
*
*/
var defaultsDeep = rest(function(args) {
args.push(undefined, mergeDefaults);
return mergeWith.apply(undefined, args);
});
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$9 = 'Expected a function';
/**
* The base implementation of `_.delay` and `_.defer` which accepts an array
* of `func` arguments.
*
* @private
* @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation.
* @param {Object} args The arguments provide to `func`.
* @returns {number} Returns the timer id.
*/
function baseDelay(func, wait, args) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$9);
}
return setTimeout(function() { func.apply(undefined, args); }, wait);
}
/**
* Defers invoking the `func` until the current call stack has cleared. Any
* additional arguments are provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to defer.
* @param {...*} [args] The arguments to invoke the function with.
* @returns {number} Returns the timer id.
* @example
*
* _.defer(function(text) {
* console.log(text);
* }, 'deferred');
* // logs 'deferred' after one or more milliseconds
*/
var defer = rest(function(func, args) {
return baseDelay(func, 1, args);
});
/**
* Invokes `func` after `wait` milliseconds. Any additional arguments are
* provided to `func` when it's invoked.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to delay.
* @param {number} wait The number of milliseconds to delay invocation.
* @param {...*} [args] The arguments to invoke the function with.
* @returns {number} Returns the timer id.
* @example
*
* _.delay(function(text) {
* console.log(text);
* }, 1000, 'later');
* // => logs 'later' after one second
*/
var delay = rest(function(func, wait, args) {
return baseDelay(func, wait, args);
});
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$1 = '__lodash_hash_undefined__';
/**
* Adds `value` to the set cache.
*
* @private
* @name push
* @memberOf SetCache
* @param {*} value The value to cache.
*/
function cachePush(value) {
var map = this.__data__;
if (isKeyable(value)) {
var data = map.__data__,
hash = typeof value == 'string' ? data.string : data.hash;
hash[value] = HASH_UNDEFINED$1;
}
else {
map.set(value, HASH_UNDEFINED$1);
}
}
/**
*
* Creates a set cache object to store unique values.
*
* @private
* @param {Array} [values] The values to cache.
*/
function SetCache(values) {
var index = -1,
length = values ? values.length : 0;
this.__data__ = new MapCache;
while (++index < length) {
this.push(values[index]);
}
}
// Add functions to the `SetCache`.
SetCache.prototype.push = cachePush;
/**
* Gets the index at which the first occurrence of `NaN` is found in `array`.
*
* @private
* @param {Array} array The array to search.
* @param {number} fromIndex The index to search from.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {number} Returns the index of the matched `NaN`, else `-1`.
*/
function indexOfNaN(array, fromIndex, fromRight) {
var length = array.length,
index = fromIndex + (fromRight ? 0 : -1);
while ((fromRight ? index-- : ++index < length)) {
var other = array[index];
if (other !== other) {
return index;
}
}
return -1;
}
/**
* The base implementation of `_.indexOf` without `fromIndex` bounds checks.
*
* @private
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @param {number} fromIndex The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseIndexOf(array, value, fromIndex) {
if (value !== value) {
return indexOfNaN(array, fromIndex);
}
var index = fromIndex - 1,
length = array.length;
while (++index < length) {
if (array[index] === value) {
return index;
}
}
return -1;
}
/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';
/**
* Checks if `value` is in `cache` mimicking the return signature of
* `_.indexOf` by returning `0` if `value` is found, else `-1`.
*
* @private
* @param {Object} cache The set cache to search.
* @param {*} value The value to search for.
* @returns {number} Returns `0` if `value` is found, else `-1`.
*/
function cacheIndexOf(cache, value) {
var map = cache.__data__;
if (isKeyable(value)) {
var data = map.__data__,
hash = typeof value == 'string' ? data.string : data.hash;
return hash[value] === HASH_UNDEFINED ? 0 : -1;
}
return map.has(value) ? 0 : -1;
}
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE = 200;
/**
* The base implementation of `_.differenceBy` without support for callback
* shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Array} values The values to exclude.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new array of filtered values.
*/
function baseDifferenceBy(array, values, iteratee) {
var index = -1,
indexOf = baseIndexOf,
isCommon = true,
length = array.length,
result = [],
valuesLength = values.length;
if (!length) {
return result;
}
if (iteratee) {
values = arrayMap(values, function(value) { return iteratee(value); });
}
if (values.length >= LARGE_ARRAY_SIZE) {
indexOf = cacheIndexOf;
isCommon = false;
values = new SetCache(values);
}
outer:
while (++index < length) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
if (isCommon && computed === computed) {
var valuesIndex = valuesLength;
while (valuesIndex--) {
if (values[valuesIndex] === computed) {
continue outer;
}
}
result.push(value);
}
else if (indexOf(values, computed, 0) < 0) {
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.difference` without support for excluding
* multiple arrays of values.
*
* @private
* @param {Array} array The array to inspect.
* @param {Array} values The values to exclude.
* @returns {Array} Returns the new array of filtered values.
*/
function baseDifference(array, values) {
return baseDifferenceBy(array, values);
}
/**
* Creates an array of unique `array` values not included in the other
* provided arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @param {...Array} [values] The values to exclude.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.difference([3, 2, 1], [4, 2]);
* // => [3, 1]
*/
var difference = rest(function(array, values) {
return isArrayLikeObject(array)
? baseDifference(array, baseFlatten(values, false, true))
: [];
});
/**
* This method is like `_.difference` except that it accepts `iteratee` which
* is invoked for each element of `array` and `values` to generate the criterion
* by which uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @param {...Array} [values] The values to exclude.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.differenceBy([3.1, 2.2, 1.3], [4.4, 2.5], Math.floor);
* // => [3.1, 1.3]
*
* // using the `_.property` callback shorthand
* _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
* // => [{ 'x': 2 }]
*/
var differenceBy = rest(function(array, values) {
var iteratee = last(values);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return isArrayLikeObject(array)
? baseDifferenceBy(array, baseFlatten(values, false, true), baseIteratee(iteratee))
: [];
});
/**
* Creates a function that checks if **any** of the `predicates` return
* truthy when invoked with the arguments provided to the created function.
*
* @static
* @memberOf _
* @category Utility
* @param {...(Function|Function[])} predicates The predicates to check.
* @returns {Function} Returns the new function.
* @example
*
* var disjed = _.disj(Boolean, isFinite);
*
* disjed('1');
* // => true
*
* disjed(null);
* // => true
*
* disjed(NaN);
* // => false
*/
var disj = createInvoker(arraySome);
/**
* Creates a slice of `array` with `n` elements dropped from the beginning.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to drop.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.drop([1, 2, 3]);
* // => [2, 3]
*
* _.drop([1, 2, 3], 2);
* // => [3]
*
* _.drop([1, 2, 3], 5);
* // => []
*
* _.drop([1, 2, 3], 0);
* // => [1, 2, 3]
*/
function drop(array, n, guard) {
if (!(array && array.length)) {
return [];
}
n = (guard || n === undefined) ? 1 : n;
return baseSlice(array, n < 0 ? 0 : n);
}
/**
* Creates a slice of `array` with `n` elements dropped from the end.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to drop.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.dropRight([1, 2, 3]);
* // => [1, 2]
*
* _.dropRight([1, 2, 3], 2);
* // => [1]
*
* _.dropRight([1, 2, 3], 5);
* // => []
*
* _.dropRight([1, 2, 3], 0);
* // => [1, 2, 3]
*/
function dropRight(array, n, guard) {
var length = array ? array.length : 0;
if (!length) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
n = length - n;
return baseSlice(array, 0, n < 0 ? 0 : n);
}
/**
* The base implementation of methods like `_.dropWhile` and `_.takeWhile`
* without support for callback shorthands.
*
* @private
* @param {Array} array The array to query.
* @param {Function} predicate The function invoked per iteration.
* @param {boolean} [isDrop] Specify dropping elements instead of taking them.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Array} Returns the slice of `array`.
*/
function baseWhile(array, predicate, isDrop, fromRight) {
var length = array.length,
index = fromRight ? length : -1;
while ((fromRight ? index-- : ++index < length) &&
predicate(array[index], index, array)) {}
return isDrop
? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
: baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
}
/**
* Creates a slice of `array` excluding elements dropped from the end.
* Elements are dropped until `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index, array).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* resolve( _.dropRightWhile(users, function(o) { return !o.active; }) );
* // => ['barney']
*
* // using the `_.matches` callback shorthand
* resolve( _.dropRightWhile(users, { 'user': 'pebbles', 'active': false }) );
* // => ['barney', 'fred']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.dropRightWhile(users, ['active', false]) );
* // => ['barney']
*
* // using the `_.property` callback shorthand
* resolve( _.dropRightWhile(users, 'active') );
* // => ['barney', 'fred', 'pebbles']
*/
function dropRightWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, baseIteratee(predicate, 3), true, true)
: [];
}
/**
* Creates a slice of `array` excluding elements dropped from the beginning.
* Elements are dropped until `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index, array).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': true }
* ];
*
* resolve( _.dropWhile(users, function(o) { return !o.active; }) );
* // => ['pebbles']
*
* // using the `_.matches` callback shorthand
* resolve( _.dropWhile(users, { 'user': 'barney', 'active': false }) );
* // => ['fred', 'pebbles']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.dropWhile(users, ['active', false]) );
* // => ['pebbles']
*
* // using the `_.property` callback shorthand
* resolve( _.dropWhile(users, 'active') );
* // => ['barney', 'fred', 'pebbles']
*/
function dropWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, baseIteratee(predicate, 3), true)
: [];
}
/**
* Checks if `string` ends with the given target string.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to search.
* @param {string} [target] The string to search for.
* @param {number} [position=string.length] The position to search from.
* @returns {boolean} Returns `true` if `string` ends with `target`, else `false`.
* @example
*
* _.endsWith('abc', 'c');
* // => true
*
* _.endsWith('abc', 'b');
* // => false
*
* _.endsWith('abc', 'b', 2);
* // => true
*/
function endsWith(string, target, position) {
string = toString(string);
target = typeof target == 'string' ? target : (target + '');
var length = string.length;
position = position === undefined
? length
: clamp(toInteger(position), 0, length);
position -= target.length;
return position >= 0 && string.indexOf(target, position) == position;
}
/**
* Performs a [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* comparison between two values to determine if they are equivalent.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'user': 'fred' };
* var other = { 'user': 'fred' };
*
* _.eq(object, object);
* // => true
*
* _.eq(object, other);
* // => false
*
* _.eq('a', 'a');
* // => true
*
* _.eq('a', Object('a'));
* // => false
*
* _.eq(NaN, NaN);
* // => true
*/
function eq(value, other) {
return value === other || (value !== value && other !== other);
}
/** Used to map characters to HTML entities. */
var htmlEscapes = {
'&': '&amp;',
'<': '&lt;',
'>': '&gt;',
'"': '&quot;',
"'": '&#39;',
'`': '&#96;'
};
/**
* Used by `_.escape` to convert characters to HTML entities.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
function escapeHtmlChar(chr) {
return htmlEscapes[chr];
}
var reUnescapedHtml = /[&<>"'`]/g;
var reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
/**
* Converts the characters "&", "<", ">", '"', "'", and "\`" in `string` to
* their corresponding HTML entities.
*
* **Note:** No other characters are escaped. To escape additional characters
* use a third-party library like [_he_](https://mths.be/he).
*
* Though the ">" character is escaped for symmetry, characters like
* ">" and "/" don't need escaping in HTML and have no special meaning
* unless they're part of a tag or unquoted attribute value.
* See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
* (under "semi-related fun fact") for more details.
*
* Backticks are escaped because in Internet Explorer < 9, they can break out
* of attribute values or HTML comments. See [#59](https://html5sec.org/#59),
* [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and
* [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/)
* for more details.
*
* When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping)
* to reduce XSS vectors.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to escape.
* @returns {string} Returns the escaped string.
* @example
*
* _.escape('fred, barney, & pebbles');
* // => 'fred, barney, &amp; pebbles'
*/
function escape(string) {
string = toString(string);
return (string && reHasUnescapedHtml.test(string))
? string.replace(reUnescapedHtml, escapeHtmlChar)
: string;
}
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
var reHasRegExpChar = RegExp(reRegExpChar.source);
/**
* Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
* "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to escape.
* @returns {string} Returns the escaped string.
* @example
*
* _.escapeRegExp('[lodash](https://lodash.com/)');
* // => '\[lodash\]\(https://lodash\.com/\)'
*/
function escapeRegExp(string) {
string = toString(string);
return (string && reHasRegExpChar.test(string))
? string.replace(reRegExpChar, '\\$&')
: string;
}
/**
* The base implementation of `_.every` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`
*/
function baseEvery(collection, predicate) {
var result = true;
baseEach(collection, function(value, index, collection) {
result = !!predicate(value, index, collection);
return result;
});
return result;
}
/**
* Checks if `predicate` returns truthy for **all** elements of `collection`.
* Iteration is stopped once `predicate` returns falsey. The predicate is
* invoked with three arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`.
* @example
*
* _.every([true, 1, null, 'yes'], Boolean);
* // => false
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false }
* ];
*
* // using the `_.matches` callback shorthand
* _.every(users, { 'user': 'barney', 'active': false });
* // => false
*
* // using the `_.matchesProperty` callback shorthand
* _.every(users, ['active', false]);
* // => true
*
* // using the `_.property` callback shorthand
* _.every(users, 'active');
* // => false
*/
function every(collection, predicate, guard) {
var func = isArray(collection) ? arrayEvery : baseEvery;
if (guard && isIterateeCall(collection, predicate, guard)) {
predicate = undefined;
}
return func(collection, baseIteratee(predicate, 3));
}
/**
* This method is like `_.assign` except that it iterates over own and
* inherited source properties.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.b = 2;
* }
*
* function Bar() {
* this.d = 4;
* }
*
* Foo.prototype.c = 3;
* Bar.prototype.e = 5;
*
* _.extend({ 'a': 1 }, new Foo, new Bar);
* // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 }
*/
var extend = createAssigner(function(object, source) {
copyObject(source, keysIn(source), object);
});
/**
* The base implementation of `_.fill` without an iteratee call guard.
*
* @private
* @param {Array} array The array to fill.
* @param {*} value The value to fill `array` with.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns `array`.
*/
function baseFill(array, value, start, end) {
var length = array.length;
start = start == null ? 0 : toInteger(start);
if (start < 0) {
start = -start > length ? 0 : (length + start);
}
end = (end === undefined || end > length) ? length : toInteger(end);
if (end < 0) {
end += length;
}
length = start > end ? 0 : (end >>> 0);
start >>>= 0;
while (start < length) {
array[start++] = value;
}
return array;
}
/**
* Fills elements of `array` with `value` from `start` up to, but not
* including, `end`.
*
* **Note:** This method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to fill.
* @param {*} value The value to fill `array` with.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3];
*
* _.fill(array, 'a');
* console.log(array);
* // => ['a', 'a', 'a']
*
* _.fill(Array(3), 2);
* // => [2, 2, 2]
*
* _.fill([4, 6, 8, 10], '*', 1, 3);
* // => [4, '*', '*', 10]
*/
function fill(array, value, start, end) {
var length = array ? array.length : 0;
if (!length) {
return [];
}
if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
start = 0;
end = length;
}
return baseFill(array, value, start, end);
}
/**
* A specialized version of `_.filter` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
*/
function arrayFilter(array, predicate) {
var index = -1,
length = array.length,
resIndex = -1,
result = [];
while (++index < length) {
var value = array[index];
if (predicate(value, index, array)) {
result[++resIndex] = value;
}
}
return result;
}
/**
* The base implementation of `_.filter` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
*/
function baseFilter(collection, predicate) {
var result = [];
baseEach(collection, function(value, index, collection) {
if (predicate(value, index, collection)) {
result.push(value);
}
});
return result;
}
/**
* Iterates over elements of `collection`, returning an array of all elements
* `predicate` returns truthy for. The predicate is invoked with three arguments:
* (value, index|key, collection).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false }
* ];
*
* resolve( _.filter(users, function(o) { return !o.active; }) );
* // => ['fred']
*
* // using the `_.matches` callback shorthand
* resolve( _.filter(users, { 'age': 36, 'active': true }) );
* // => ['barney']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.filter(users, ['active', false]) );
* // => ['fred']
*
* // using the `_.property` callback shorthand
* resolve( _.filter(users, 'active') );
* // => ['barney']
*/
function filter(collection, predicate) {
var func = isArray(collection) ? arrayFilter : baseFilter;
return func(collection, baseIteratee(predicate, 3));
}
/**
* The base implementation of methods like `_.find` and `_.findKey` without
* support for callback shorthands, which iterates over `collection` using
* the provided `eachFunc`.
*
* @private
* @param {Array|Object} collection The collection to search.
* @param {Function} predicate The function invoked per iteration.
* @param {Function} eachFunc The function to iterate over `collection`.
* @param {boolean} [retKey] Specify returning the key of the found element instead of the element itself.
* @returns {*} Returns the found element or its key, else `undefined`.
*/
function baseFind(collection, predicate, eachFunc, retKey) {
var result;
eachFunc(collection, function(value, key, collection) {
if (predicate(value, key, collection)) {
result = retKey ? key : value;
return false;
}
});
return result;
}
/**
* The base implementation of `_.findIndex` and `_.findLastIndex` without
* support for callback shorthands.
*
* @private
* @param {Array} array The array to search.
* @param {Function} predicate The function invoked per iteration.
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseFindIndex(array, predicate, fromRight) {
var length = array.length,
index = fromRight ? length : -1;
while ((fromRight ? index-- : ++index < length)) {
if (predicate(array[index], index, array)) {
return index;
}
}
return -1;
}
/**
* Iterates over elements of `collection`, returning the first element
* `predicate` returns truthy for. The predicate is invoked with three arguments:
* (value, index|key, collection).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {*} Returns the matched element, else `undefined`.
* @example
*
* var resolve = _.partial(_.result, _, 'user');
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false },
* { 'user': 'pebbles', 'age': 1, 'active': true }
* ];
*
* resolve( _.find(users, function(o) { return o.age < 40; }) );
* // => 'barney'
*
* // using the `_.matches` callback shorthand
* resolve( _.find(users, { 'age': 1, 'active': true }) );
* // => 'pebbles'
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.find(users, ['active', false]) );
* // => 'fred'
*
* // using the `_.property` callback shorthand
* resolve( _.find(users, 'active') );
* // => 'barney'
*/
function find(collection, predicate) {
predicate = baseIteratee(predicate, 3);
if (isArray(collection)) {
var index = baseFindIndex(collection, predicate);
return index > -1 ? collection[index] : undefined;
}
return baseFind(collection, predicate, baseEach);
}
/**
* This method is like `_.find` except that it returns the index of the first
* element `predicate` returns truthy for instead of the element itself.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {number} Returns the index of the found element, else `-1`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': true }
* ];
*
* _.findIndex(users, function(o) { return o.user == 'barney'; });
* // => 0
*
* // using the `_.matches` callback shorthand
* _.findIndex(users, { 'user': 'fred', 'active': false });
* // => 1
*
* // using the `_.matchesProperty` callback shorthand
* _.findIndex(users, ['active', false]);
* // => 0
*
* // using the `_.property` callback shorthand
* _.findIndex(users, 'active');
* // => 2
*/
function findIndex(array, predicate) {
return (array && array.length)
? baseFindIndex(array, baseIteratee(predicate, 3))
: -1;
}
/**
* This method is like `_.find` except that it returns the key of the first
* element `predicate` returns truthy for instead of the element itself.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {string|undefined} Returns the key of the matched element, else `undefined`.
* @example
*
* var users = {
* 'barney': { 'age': 36, 'active': true },
* 'fred': { 'age': 40, 'active': false },
* 'pebbles': { 'age': 1, 'active': true }
* };
*
* _.findKey(users, function(o) { return o.age < 40; });
* // => 'barney' (iteration order is not guaranteed)
*
* // using the `_.matches` callback shorthand
* _.findKey(users, { 'age': 1, 'active': true });
* // => 'pebbles'
*
* // using the `_.matchesProperty` callback shorthand
* _.findKey(users, ['active', false]);
* // => 'fred'
*
* // using the `_.property` callback shorthand
* _.findKey(users, 'active');
* // => 'barney'
*/
function findKey(object, predicate) {
return baseFind(object, baseIteratee(predicate, 3), baseForOwn, true);
}
/**
* This function is like `baseFor` except that it iterates over properties
* in the opposite order.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {Function} keysFunc The function to get the keys of `object`.
* @returns {Object} Returns `object`.
*/
var baseForRight = createBaseFor(true);
/**
* The base implementation of `_.forOwnRight` without support for callback shorthands.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`.
*/
function baseForOwnRight(object, iteratee) {
return object && baseForRight(object, iteratee, keys);
}
/**
* The base implementation of `_.forEachRight` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
*/
var baseEachRight = createBaseEach(baseForOwnRight, true);
/**
* This method is like `_.find` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {*} Returns the matched element, else `undefined`.
* @example
*
* _.findLast([1, 2, 3, 4], function(n) {
* return n % 2 == 1;
* });
* // => 3
*/
function findLast(collection, predicate) {
predicate = baseIteratee(predicate, 3);
if (isArray(collection)) {
var index = baseFindIndex(collection, predicate, true);
return index > -1 ? collection[index] : undefined;
}
return baseFind(collection, predicate, baseEachRight);
}
/**
* This method is like `_.findIndex` except that it iterates over elements
* of `collection` from right to left.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {number} Returns the index of the found element, else `-1`.
* @example
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
* // => 2
*
* // using the `_.matches` callback shorthand
* _.findLastIndex(users, { 'user': 'barney', 'active': true });
* // => 0
*
* // using the `_.matchesProperty` callback shorthand
* _.findLastIndex(users, ['active', false]);
* // => 2
*
* // using the `_.property` callback shorthand
* _.findLastIndex(users, 'active');
* // => 0
*/
function findLastIndex(array, predicate) {
return (array && array.length)
? baseFindIndex(array, baseIteratee(predicate, 3), true)
: -1;
}
/**
* This method is like `_.findKey` except that it iterates over elements of
* a collection in the opposite order.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to search.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {string|undefined} Returns the key of the matched element, else `undefined`.
* @example
*
* var users = {
* 'barney': { 'age': 36, 'active': true },
* 'fred': { 'age': 40, 'active': false },
* 'pebbles': { 'age': 1, 'active': true }
* };
*
* _.findLastKey(users, function(o) { return o.age < 40; });
* // => returns 'pebbles' assuming `_.findKey` returns 'barney'
*
* // using the `_.matches` callback shorthand
* _.findLastKey(users, { 'age': 36, 'active': true });
* // => 'barney'
*
* // using the `_.matchesProperty` callback shorthand
* _.findLastKey(users, ['active', false]);
* // => 'fred'
*
* // using the `_.property` callback shorthand
* _.findLastKey(users, 'active');
* // => 'pebbles'
*/
function findLastKey(object, predicate) {
return baseFind(object, baseIteratee(predicate, 3), baseForOwnRight, true);
}
/**
* Flattens `array` a single level.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to flatten.
* @returns {Array} Returns the new flattened array.
* @example
*
* _.flatten([1, [2, 3, [4]]]);
* // => [1, 2, 3, [4]]
*/
function flatten(array) {
var length = array ? array.length : 0;
return length ? baseFlatten(array) : [];
}
/**
* This method is like `_.flatten` except that it recursively flattens `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to recursively flatten.
* @returns {Array} Returns the new flattened array.
* @example
*
* _.flattenDeep([1, [2, 3, [4]]]);
* // => [1, 2, 3, 4]
*/
function flattenDeep(array) {
var length = array ? array.length : 0;
return length ? baseFlatten(array, true) : [];
}
/** Used to compose bitmasks for wrapper metadata. */
var FLIP_FLAG = 512;
/**
* Creates a function that invokes `func` with arguments reversed.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to flip arguments for.
* @returns {Function} Returns the new function.
* @example
*
* var flipped = _.flip(function() {
* return _.toArray(arguments);
* });
*
* flipped('a', 'b', 'c', 'd');
* // => ['d', 'c', 'b', 'a']
*/
function flip(func) {
return createWrapper(func, FLIP_FLAG);
}
/**
* Calculates `number` rounded down to `precision`.
*
* @static
* @memberOf _
* @category Math
* @param {number} number The number to round down.
* @param {number} [precision=0] The precision to round down to.
* @returns {number} Returns the rounded down number.
* @example
*
* _.floor(4.006);
* // => 4
*
* _.floor(0.046, 2);
* // => 0.04
*
* _.floor(4060, -2);
* // => 4000
*/
var floor = createRound('floor');
var CURRY_FLAG$1 = 8;
var PARTIAL_FLAG$4 = 32;
var ARY_FLAG$1 = 128;
var REARG_FLAG$1 = 256;
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE$1 = 200;
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$10 = 'Expected a function';
/**
* Creates a `_.flow` or `_.flowRight` function.
*
* @private
* @param {boolean} [fromRight] Specify iterating from right to left.
* @returns {Function} Returns the new flow function.
*/
function createFlow(fromRight) {
return rest(function(funcs) {
funcs = baseFlatten(funcs);
var length = funcs.length,
index = length,
prereq = LodashWrapper.prototype.thru;
if (fromRight) {
funcs.reverse();
}
while (index--) {
var func = funcs[index];
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$10);
}
if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
var wrapper = new LodashWrapper([], true);
}
}
index = wrapper ? index : length;
while (++index < length) {
func = funcs[index];
var funcName = getFuncName(func),
data = funcName == 'wrapper' ? getData(func) : undefined;
if (data && isLaziable(data[0]) && data[1] == (ARY_FLAG$1 | CURRY_FLAG$1 | PARTIAL_FLAG$4 | REARG_FLAG$1) && !data[4].length && data[9] == 1) {
wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
} else {
wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func);
}
}
return function() {
var args = arguments,
value = args[0];
if (wrapper && args.length == 1 && isArray(value) && value.length >= LARGE_ARRAY_SIZE$1) {
return wrapper.plant(value).value();
}
var index = 0,
result = length ? funcs[index].apply(this, args) : value;
while (++index < length) {
result = funcs[index].call(this, result);
}
return result;
};
});
}
/**
* Creates a function that returns the result of invoking the provided
* functions with the `this` binding of the created function, where each
* successive invocation is supplied the return value of the previous.
*
* @static
* @memberOf _
* @category Utility
* @param {...(Function|Function[])} [funcs] Functions to invoke.
* @returns {Function} Returns the new function.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var addSquare = _.flow(_.add, square);
* addSquare(1, 2);
* // => 9
*/
var flow = createFlow();
/**
* This method is like `_.flow` except that it creates a function that
* invokes the provided functions from right to left.
*
* @static
* @memberOf _
* @category Utility
* @param {...(Function|Function[])} [funcs] Functions to invoke.
* @returns {Function} Returns the new function.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var addSquare = _.flowRight(square, _.add);
* addSquare(1, 2);
* // => 9
*/
var flowRight = createFlow(true);
/**
* Converts `value` to a function if it's not one.
*
* @private
* @param {*} value The value to process.
* @returns {Function} Returns the function.
*/
function toFunction(value) {
return typeof value == 'function' ? value : identity;
}
/**
* Iterates over elements of `collection` invoking `iteratee` for each element.
* The iteratee is invoked with three arguments: (value, index|key, collection).
* Iteratee functions may exit iteration early by explicitly returning `false`.
*
* **Note:** As with other "Collections" methods, objects with a "length" property
* are iterated like arrays. To avoid this behavior use `_.forIn` or `_.forOwn`
* for object iteration.
*
* @static
* @memberOf _
* @alias each
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
* @example
*
* _([1, 2]).forEach(function(value) {
* console.log(value);
* });
* // => logs `1` then `2`
*
* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
* console.log(key);
* });
* // => logs 'a' then 'b' (iteration order is not guaranteed)
*/
function forEach(collection, iteratee) {
return (typeof iteratee == 'function' && isArray(collection))
? arrayEach(collection, iteratee)
: baseEach(collection, toFunction(iteratee));
}
/**
* A specialized version of `_.forEachRight` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns `array`.
*/
function arrayEachRight(array, iteratee) {
var length = array.length;
while (length--) {
if (iteratee(array[length], length, array) === false) {
break;
}
}
return array;
}
/**
* This method is like `_.forEach` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @alias eachRight
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array|Object} Returns `collection`.
* @example
*
* _.forEachRight([1, 2], function(value) {
* console.log(value);
* });
* // => logs `2` then `1`
*/
function forEachRight(collection, iteratee) {
return (typeof iteratee == 'function' && isArray(collection))
? arrayEachRight(collection, iteratee)
: baseEachRight(collection, toFunction(iteratee));
}
/**
* Iterates over own and inherited enumerable properties of an object invoking
* `iteratee` for each property. The iteratee is invoked with three arguments:
* (value, key, object). Iteratee functions may exit iteration early by explicitly
* returning `false`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forIn(new Foo, function(value, key) {
* console.log(key);
* });
* // => logs 'a', 'b', then 'c' (iteration order is not guaranteed)
*/
function forIn(object, iteratee) {
return object == null ? object : baseFor(object, toFunction(iteratee), keysIn);
}
/**
* This method is like `_.forIn` except that it iterates over properties of
* `object` in the opposite order.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forInRight(new Foo, function(value, key) {
* console.log(key);
* });
* // => logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'
*/
function forInRight(object, iteratee) {
return object == null ? object : baseForRight(object, toFunction(iteratee), keysIn);
}
/**
* Iterates over own enumerable properties of an object invoking `iteratee`
* for each property. The iteratee is invoked with three arguments:
* (value, key, object). Iteratee functions may exit iteration early by
* explicitly returning `false`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forOwn(new Foo, function(value, key) {
* console.log(key);
* });
* // => logs 'a' then 'b' (iteration order is not guaranteed)
*/
function forOwn(object, iteratee) {
return object && baseForOwn(object, toFunction(iteratee));
}
/**
* This method is like `_.forOwn` except that it iterates over properties of
* `object` in the opposite order.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns `object`.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.forOwnRight(new Foo, function(value, key) {
* console.log(key);
* });
* // => logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'
*/
function forOwnRight(object, iteratee) {
return object && baseForOwnRight(object, toFunction(iteratee));
}
/**
* The base implementation of `_.functions` which creates an array of
* `object` function property names filtered from those provided.
*
* @private
* @param {Object} object The object to inspect.
* @param {Array} props The property names to filter.
* @returns {Array} Returns the new array of filtered property names.
*/
function baseFunctions(object, props) {
return arrayFilter(props, function(key) {
return isFunction(object[key]);
});
}
/**
* Creates an array of function property names from all enumerable properties,
* own and inherited, of `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to inspect.
* @returns {Array} Returns the new array of property names.
* @example
*
* _.functions(_);
* // => ['after', 'ary', 'assign', ...]
*/
function functions(object) {
return object == null ? [] : baseFunctions(object, keysIn(object));
}
/** Used for built-in method references. */
var objectProto$1 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$1.hasOwnProperty;
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` through `iteratee`. The corresponding value
* of each key is an array of the elements responsible for generating the key.
* The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* _.groupBy([6.1, 4.2, 6.3], Math.floor);
* // => { '4': [4.2], '6': [6.1, 6.3] }
*
* // using the `_.property` callback shorthand
* _.groupBy(['one', 'two', 'three'], 'length');
* // => { '3': ['one', 'two'], '5': ['three'] }
*/
var groupBy = createAggregator(function(result, value, key) {
if (hasOwnProperty$1.call(result, key)) {
result[key].push(value);
} else {
result[key] = [value];
}
});
/**
* Checks if `value` is greater than `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than `other`, else `false`.
* @example
*
* _.gt(3, 1);
* // => true
*
* _.gt(3, 3);
* // => false
*
* _.gt(1, 3);
* // => false
*/
function gt(value, other) {
return value > other;
}
/**
* Checks if `value` is greater than or equal to `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is greater than or equal to `other`, else `false`.
* @example
*
* _.gte(3, 1);
* // => true
*
* _.gte(3, 3);
* // => true
*
* _.gte(1, 3);
* // => false
*/
function gte(value, other) {
return value >= other;
}
/**
* Checks if `path` is a direct property of `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path to check.
* @returns {boolean} Returns `true` if `path` exists, else `false`.
* @example
*
* var object = { 'a': { 'b': { 'c': 3 } } };
* var other = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) });
*
* _.has(object, 'a');
* // => true
*
* _.has(object, 'a.b.c');
* // => true
*
* _.has(object, ['a', 'b', 'c']);
* // => true
*
* _.has(other, 'a');
* // => false
*/
function has(object, path) {
return hasPath(object, path, baseHas);
}
/**
* Gets the first element of `array`.
*
* @static
* @memberOf _
* @alias first
* @category Array
* @param {Array} array The array to query.
* @returns {*} Returns the first element of `array`.
* @example
*
* _.head([1, 2, 3]);
* // => 1
*
* _.head([]);
* // => undefined
*/
function head(array) {
return array ? array[0] : undefined;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$2 = Math.max;
var nativeMin = Math.min;
/**
* Checks if `n` is between `start` and up to but not including, `end`. If
* `end` is not specified it's set to `start` with `start` then set to `0`.
* If `start` is greater than `end` the params are swapped to support
* negative ranges.
*
* @static
* @memberOf _
* @category Number
* @param {number} number The number to check.
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @returns {boolean} Returns `true` if `number` is in the range, else `false`.
* @example
*
* _.inRange(3, 2, 4);
* // => true
*
* _.inRange(4, 8);
* // => true
*
* _.inRange(4, 2);
* // => false
*
* _.inRange(2, 2);
* // => false
*
* _.inRange(1.2, 2);
* // => true
*
* _.inRange(5.2, 4);
* // => false
*
* _.inRange(-3, -2, -6);
* // => true
*/
function inRange(number, start, end) {
start = +start || 0;
if (end === undefined) {
end = start;
start = 0;
} else {
end = +end || 0;
}
return number >= nativeMin(start, end) && number < nativeMax$2(start, end);
}
/**
* The base implementation of `_.values` and `_.valuesIn` which creates an
* array of `object` property values corresponding to the property names
* of `props`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} props The property names to get values for.
* @returns {Object} Returns the array of property values.
*/
function baseValues(object, props) {
return arrayMap(props, function(key) {
return object[key];
});
}
/**
* Creates an array of the own enumerable property values of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property values.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.values(new Foo);
* // => [1, 2] (iteration order is not guaranteed)
*
* _.values('hi');
* // => ['h', 'i']
*/
function values(object) {
return object ? baseValues(object, keys(object)) : [];
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$3 = Math.max;
/**
* Checks if `target` is in `collection` using
* [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons. If `fromIndex` is negative, it's used as the offset
* from the end of `collection`.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object|string} collection The collection to search.
* @param {*} target The value to search for.
* @param {number} [fromIndex=0] The index to search from.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.reduce`.
* @returns {boolean} Returns `true` if a matching element is found, else `false`.
* @example
*
* _.includes([1, 2, 3], 1);
* // => true
*
* _.includes([1, 2, 3], 1, 2);
* // => false
*
* _.includes({ 'user': 'fred', 'age': 40 }, 'fred');
* // => true
*
* _.includes('pebbles', 'eb');
* // => true
*/
function includes(collection, target, fromIndex, guard) {
collection = isArrayLike(collection) ? collection : values(collection);
fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
var length = collection.length;
if (fromIndex < 0) {
fromIndex = nativeMax$3(length + fromIndex, 0);
}
return isString(collection)
? (fromIndex <= length && collection.indexOf(target, fromIndex) > -1)
: (!!length && baseIndexOf(collection, target, fromIndex) > -1);
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$4 = Math.max;
/**
* Gets the index at which the first occurrence of `value` is found in `array`
* using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons. If `fromIndex` is negative, it's used as the offset
* from the end of `array`. If `array` is sorted providing `true` for `fromIndex`
* performs a faster binary search.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @param {number} [fromIndex=0] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.indexOf([1, 2, 1, 2], 2);
* // => 1
*
* // using `fromIndex`
* _.indexOf([1, 2, 1, 2], 2, 2);
* // => 3
*/
function indexOf$1(array, value, fromIndex) {
var length = array ? array.length : 0;
if (!length) {
return -1;
}
fromIndex = fromIndex ? toInteger(fromIndex) : 0;
if (fromIndex < 0) {
fromIndex = nativeMax$4(length + fromIndex, 0);
}
return baseIndexOf(array, value, fromIndex);
}
/**
* Gets all but the last element of `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.initial([1, 2, 3]);
* // => [1, 2]
*/
function initial(array) {
return dropRight(array, 1);
}
/**
* The base implementation of `_.intersectionBy` without support for callback
* shorthands.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new array of shared values.
*/
function baseIntersectionBy(arrays, iteratee) {
var othLength = arrays.length,
othIndex = othLength,
caches = Array(othLength),
result = [];
while (othIndex--) {
var array = arrays[othIndex];
if (othIndex && iteratee) {
array = arrayMap(array, function(value) { return iteratee(value); });
}
caches[othIndex] = (iteratee || array.length >= 120) ? new SetCache(othIndex && array) : null;
}
array = arrays[0];
var index = -1,
length = array ? array.length : 0,
seen = caches[0];
outer:
while (++index < length) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
if ((seen ? cacheIndexOf(seen, computed) : baseIndexOf(result, computed, 0)) < 0) {
var othIndex = othLength;
while (--othIndex) {
var cache = caches[othIndex];
if ((cache ? cacheIndexOf(cache, computed) : baseIndexOf(arrays[othIndex], computed, 0)) < 0) {
continue outer;
}
}
if (seen) {
seen.push(computed);
}
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.intersection` that accepts an array of arrays
* to inspect.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @returns {Array} Returns the new array of shared values.
*/
function baseIntersection(arrays) {
return baseIntersectionBy(arrays);
}
/**
* Converts `value` to an array-like object if it's not one.
*
* @private
* @param {*} value The value to process.
* @returns {Array} Returns the array-like object.
*/
function toArrayLikeObject(value) {
return isArrayLikeObject(value) ? value : [];
}
/**
* Creates an array of unique values that are included in all of the provided
* arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of shared values.
* @example
* _.intersection([2, 1], [4, 2], [1, 2]);
* // => [2]
*/
var intersection = rest(function(arrays) {
var mapped = arrayMap(arrays, toArrayLikeObject);
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped)
: [];
});
/**
* This method is like `_.intersection` except that it accepts `iteratee`
* which is invoked for each element of each `arrays` to generate the criterion
* by which uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns the new array of shared values.
* @example
*
* _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
* // => [2.1]
*
* // using the `_.property` callback shorthand
* _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }]
*/
var intersectionBy = rest(function(arrays) {
var iteratee = last(arrays),
mapped = arrayMap(arrays, toArrayLikeObject);
if (iteratee === last(mapped)) {
iteratee = undefined;
} else {
mapped.pop();
}
return (mapped.length && mapped[0] === arrays[0])
? baseIntersectionBy(mapped, baseIteratee(iteratee))
: [];
});
/** Used for built-in method references. */
var objectProto$2 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$2 = objectProto$2.hasOwnProperty;
/**
* Creates an object composed of the inverted keys and values of `object`.
* If `object` contains duplicate values, subsequent values overwrite property
* assignments of previous values unless `multiVal` is `true`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to invert.
* @param {boolean} [multiVal] Allow multiple values per key.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Object} Returns the new inverted object.
* @example
*
* var object = { 'a': 1, 'b': 2, 'c': 1 };
*
* _.invert(object);
* // => { '1': 'c', '2': 'b' }
*
* // with `multiVal`
* _.invert(object, true);
* // => { '1': ['a', 'c'], '2': ['b'] }
*/
function invert(object, multiVal, guard) {
return arrayReduce(keys(object), function(result, key) {
var value = object[key];
if (multiVal && !guard) {
if (hasOwnProperty$2.call(result, value)) {
result[value].push(key);
} else {
result[value] = [key];
}
}
else {
result[value] = key;
}
return result;
}, {});
}
/**
* Invokes the method at `path` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the method to invoke.
* @param {Array} args The arguments to invoke the method with.
* @returns {*} Returns the result of the invoked method.
*/
function invokePath(object, path, args) {
if (!isKey(path, object)) {
path = baseToPath(path);
object = parent$1(object, path);
path = last(path);
}
var func = object == null ? object : object[path];
return func == null ? undefined : func.apply(object, args);
}
/**
* Invokes the method at `path` of each element in `collection`, returning
* an array of the results of each invoked method. Any additional arguments
* are provided to each invoked method. If `methodName` is a function it's
* invoked for, and `this` bound to, each element in `collection`.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Array|Function|string} path The path of the method to invoke or
* the function invoked per iteration.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {Array} Returns the array of results.
* @example
*
* _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
* // => [[1, 5, 7], [1, 2, 3]]
*
* _.invoke([123, 456], String.prototype.split, '');
* // => [['1', '2', '3'], ['4', '5', '6']]
*/
var invoke = rest(function(collection, path, args) {
var index = -1,
isFunc = typeof path == 'function',
isProp = isKey(path),
result = isArrayLike(collection) ? Array(collection.length) : [];
baseEach(collection, function(value) {
var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
result[++index] = func ? func.apply(value, args) : invokePath(value, path, args);
});
return result;
});
/** `Object#toString` result references. */
var boolTag = '[object Boolean]';
/** Used for built-in method references. */
var objectProto$4 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$1 = objectProto$4.toString;
/**
* Checks if `value` is classified as a boolean primitive or object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isBoolean(false);
* // => true
*
* _.isBoolean(null);
* // => false
*/
function isBoolean(value) {
return value === true || value === false ||
(isObjectLike(value) && objToString$1.call(value) == boolTag);
}
/** `Object#toString` result references. */
var dateTag = '[object Date]';
/** Used for built-in method references. */
var objectProto$5 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$2 = objectProto$5.toString;
/**
* Checks if `value` is classified as a `Date` object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isDate(new Date);
* // => true
*
* _.isDate('Mon April 23 2012');
* // => false
*/
function isDate(value) {
return isObjectLike(value) && objToString$2.call(value) == dateTag;
}
/**
* Checks if `value` is likely a DOM element.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
* @example
*
* _.isElement(document.body);
* // => true
*
* _.isElement('<body>');
* // => false
*/
function isElement(value) {
return !!value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value);
}
/** Used to compose unicode character classes. */
var rsAstralRange$4 = '\\ud800-\\udfff';
var rsComboRange$4 = '\\u0300-\\u036f\\ufe20-\\ufe23';
var rsVarRange$4 = '\\ufe0e\\ufe0f';
var rsAstral = '[' + rsAstralRange$4 + ']';
var rsCombo$1 = '[' + rsComboRange$4 + ']';
var rsModifier$1 = '(?:\\ud83c[\\udffb-\\udfff])';
var rsNonAstral$1 = '[^' + rsAstralRange$4 + ']';
var rsRegional$1 = '(?:\\ud83c[\\udde6-\\uddff]){2}';
var rsSurrPair$1 = '[\\ud800-\\udbff][\\udc00-\\udfff]';
var rsZWJ$4 = '\\u200d';
var reOptMod$1 = rsModifier$1 + '?';
var rsOptVar$1 = '[' + rsVarRange$4 + ']?';
var rsOptJoin$1 = '(?:' + rsZWJ$4 + '(?:' + [rsNonAstral$1, rsRegional$1, rsSurrPair$1].join('|') + ')' + rsOptVar$1 + reOptMod$1 + ')*';
var rsSeq$1 = rsOptVar$1 + reOptMod$1 + rsOptJoin$1;
var rsSymbol = '(?:' + [rsNonAstral$1 + rsCombo$1 + '?', rsCombo$1, rsRegional$1, rsSurrPair$1, rsAstral].join('|') + ')';
/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
var reComplexSymbol = RegExp(rsSymbol + rsSeq$1, 'g');
/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasComplexSymbol$3 = RegExp('[' + rsZWJ$4 + rsAstralRange$4 + rsComboRange$4 + rsVarRange$4 + ']');
/**
* Gets the number of symbols in `string`.
*
* @param {string} string The string to inspect.
* @returns {number} Returns the string size.
*/
function stringSize(string) {
if (!(string && reHasComplexSymbol$3.test(string))) {
return string.length;
}
var result = reComplexSymbol.lastIndex = 0;
while (reComplexSymbol.test(string)) {
result++;
}
return result;
}
/**
* Gets the size of `collection` by returning its length for array-like
* values or the number of own enumerable properties for objects.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to inspect.
* @returns {number} Returns the collection size.
* @example
*
* _.size([1, 2, 3]);
* // => 3
*
* _.size({ 'a': 1, 'b': 2 });
* // => 2
*
* _.size('pebbles');
* // => 7
*/
function size$1(collection) {
if (collection == null) {
return 0;
}
if (isArrayLike(collection)) {
var result = collection.length;
return (result && isString(collection)) ? stringSize(collection) : result;
}
return keys(collection).length;
}
/**
* Checks if `value` is empty. A value is considered empty unless it's an
* `arguments` object, array, string, or jQuery-like collection with a length
* greater than `0` or an object with own enumerable properties.
*
* @static
* @memberOf _
* @category Lang
* @param {Array|Object|string} value The value to inspect.
* @returns {boolean} Returns `true` if `value` is empty, else `false`.
* @example
*
* _.isEmpty(null);
* // => true
*
* _.isEmpty(true);
* // => true
*
* _.isEmpty(1);
* // => true
*
* _.isEmpty([1, 2, 3]);
* // => false
*
* _.isEmpty({ 'a': 1 });
* // => false
*/
function isEmpty(value) {
return (!isObjectLike(value) || isFunction(value.splice))
? !size$1(value)
: !keys(value).length;
}
/**
* Performs a deep comparison between two values to determine if they are
* equivalent.
*
* **Note:** This method supports comparing arrays, booleans, `Date` objects,
* numbers, `Object` objects, regexes, and strings. Objects are compared by
* their own, not inherited, enumerable properties. Functions and DOM nodes
* are **not** supported.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'user': 'fred' };
* var other = { 'user': 'fred' };
*
* _.isEqual(object, other);
* // => true
*
* object === other;
* // => false
*/
function isEqual(value, other) {
return baseIsEqual(value, other);
}
/**
* This method is like `_.isEqual` except that it accepts `customizer` which is
* invoked to compare values. If `customizer` returns `undefined` comparisons are
* handled by the method instead. The `customizer` is invoked with up to seven arguments:
* (objValue, othValue [, index|key, object, other, stack]).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* function isGreeting(value) {
* return /^h(?:i|ello)$/.test(value);
* }
*
* function customizer(objValue, othValue) {
* if (isGreeting(objValue) && isGreeting(othValue)) {
* return true;
* }
* }
*
* var array = ['hello', 'goodbye'];
* var other = ['hi', 'goodbye'];
*
* _.isEqualWith(array, other, customizer);
* // => true
*/
function isEqualWith(value, other, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
var result = customizer ? customizer(value, other) : undefined;
return result === undefined ? baseIsEqual(value, other, customizer) : !!result;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsFinite = root.isFinite;
/**
* Checks if `value` is a finite primitive number.
*
* **Note:** This method is based on [`Number.isFinite`](http://ecma-international.org/ecma-262/6.0/#sec-number.isfinite).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
* @example
*
* _.isFinite(3);
* // => true
*
* _.isFinite(Number.MAX_VALUE);
* // => true
*
* _.isFinite(3.14);
* // => true
*
* _.isFinite(Infinity);
* // => false
*/
function isFinite(value) {
return typeof value == 'number' && nativeIsFinite(value);
}
/**
* Checks if `value` is an integer.
*
* **Note:** This method is based on [`Number.isInteger`](http://ecma-international.org/ecma-262/6.0/#sec-number.isinteger).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an integer, else `false`.
* @example
*
* _.isInteger(3);
* // => true
*
* _.isInteger(Number.MAX_VALUE);
* // => true
*
* _.isInteger(3.14);
* // => false
*
* _.isInteger(Infinity);
* // => false
*/
function isInteger(value) {
return typeof value == 'number' && value == toInteger(value);
}
/**
* Performs a deep comparison between `object` and `source` to determine if
* `object` contains equivalent property values.
*
* **Note:** This method supports comparing properties of arrays, booleans,
* `Date` objects, numbers, `Object` objects, regexes, and strings. Functions
* and DOM nodes are **not** supported. Provide a customizer function to extend
* support for comparing other values.
*
* @static
* @memberOf _
* @category Lang
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
* @example
*
* var object = { 'user': 'fred', 'age': 40 };
*
* _.isMatch(object, { 'age': 40 });
* // => true
*
* _.isMatch(object, { 'age': 36 });
* // => false
*/
function isMatch(object, source) {
return object === source || baseIsMatch(object, source, getMatchData(source));
}
/**
* This method is like `_.isMatch` except that it accepts `customizer` which
* is invoked to compare values. If `customizer` returns `undefined` comparisons
* are handled by the method instead. The `customizer` is invoked with three
* arguments: (objValue, srcValue, index|key, object, source).
*
* @static
* @memberOf _
* @category Lang
* @param {Object} object The object to inspect.
* @param {Object} source The object of property values to match.
* @param {Function} [customizer] The function to customize comparisons.
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
* @example
*
* function isGreeting(value) {
* return /^h(?:i|ello)$/.test(value);
* }
*
* function customizer(objValue, srcValue) {
* if (isGreeting(objValue) && isGreeting(srcValue)) {
* return true;
* }
* }
*
* var object = { 'greeting': 'hello' };
* var source = { 'greeting': 'hi' };
*
* _.isMatchWith(object, source, customizer);
* // => true
*/
function isMatchWith(object, source, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return baseIsMatch(object, source, getMatchData(source), customizer);
}
/** `Object#toString` result references. */
var numberTag = '[object Number]';
/** Used for built-in method references. */
var objectProto$9 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$5 = objectProto$9.toString;
/**
* Checks if `value` is classified as a `Number` primitive or object.
*
* **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
* as numbers, use the `_.isFinite` method.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isNumber(8.4);
* // => true
*
* _.isNumber(NaN);
* // => true
*
* _.isNumber('8.4');
* // => false
*/
function isNumber(value) {
return typeof value == 'number' ||
(isObjectLike(value) && objToString$5.call(value) == numberTag);
}
/**
* Checks if `value` is `NaN`.
*
* **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x15.1.2.4)
* which returns `true` for `undefined` and other non-numeric values.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
* @example
*
* _.isNaN(NaN);
* // => true
*
* _.isNaN(new Number(NaN));
* // => true
*
* isNaN(undefined);
* // => true
*
* _.isNaN(undefined);
* // => false
*/
function isNaN(value) {
// An `NaN` primitive is the only value that is not equal to itself.
// Perform the `toStringTag` check first to avoid errors with some ActiveX objects in IE.
return isNumber(value) && value != +value;
}
/**
* Checks if `value` is `null` or `undefined`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is nullish, else `false`.
* @example
*
* _.isNil(null);
* // => true
*
* _.isNil(void 0);
* // => true
*
* _.isNil(NaN);
* // => false
*/
function isNil$1(value) {
return value == null;
}
/**
* Checks if `value` is `null`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `null`, else `false`.
* @example
*
* _.isNull(null);
* // => true
*
* _.isNull(void 0);
* // => false
*/
function isNull(value) {
return value === null;
}
/** `Object#toString` result references. */
var regexpTag = '[object RegExp]';
/** Used for built-in method references. */
var objectProto$11 = Object.prototype;
/**
* Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
* of values.
*/
var objToString$7 = objectProto$11.toString;
/**
* Checks if `value` is classified as a `RegExp` object.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
* @example
*
* _.isRegExp(/abc/);
* // => true
*
* _.isRegExp('/abc/');
* // => false
*/
function isRegExp(value) {
return isObject(value) && objToString$7.call(value) == regexpTag;
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;
/**
* Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
* double precision number which isn't the result of a rounded unsafe integer.
*
* **Note:** This method is based on [`Number.isSafeInteger`](http://ecma-international.org/ecma-262/6.0/#sec-number.issafeinteger).
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
* @example
*
* _.isSafeInteger(3);
* // => true
*
* _.isSafeInteger(Number.MAX_VALUE);
* // => false
*
* _.isSafeInteger(3.14);
* // => false
*
* _.isSafeInteger(Infinity);
* // => false
*/
function isSafeInteger(value) {
return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
}
/**
* Checks if `value` is `undefined`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
* @example
*
* _.isUndefined(void 0);
* // => true
*
* _.isUndefined(null);
* // => false
*/
function isUndefined(value) {
return value === undefined;
}
/**
* Creates a function that performs a deep partial comparison between a given
* object and `source`, returning `true` if the given object has equivalent
* property values, else `false`.
*
* **Note:** This method supports comparing arrays, booleans, `Date` objects,
* numbers, `Object` objects, regexes, and strings. Objects are compared by
* their own and inherited enumerable properties. For comparing a single
* value see `_.matchesProperty`.
*
* @static
* @memberOf _
* @category Utility
* @param {Object} source The object of property values to match.
* @returns {Function} Returns the new function.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': true },
* { 'user': 'fred', 'age': 40, 'active': false }
* ];
*
* _.filter(users, _.matches({ 'age': 40, 'active': false }));
* // => [{ 'user': 'fred', 'age': 40, 'active': false }]
*/
function matches(source) {
return baseMatches(baseClone(source, true));
}
/**
* Creates a function that invokes `func` with the arguments of the created
* function. If `func` is a property name the created callback returns the
* property value for a given element. If `func` is an object the created
* callback returns `true` for elements that contain the equivalent object properties, otherwise it returns `false`.
*
* @static
* @memberOf _
* @category Utility
* @param {*} [func=_.identity] The value to convert to a callback.
* @returns {Function} Returns the callback.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* // wrap to create custom callback shorthands
* _.iteratee = _.wrap(_.iteratee, function(callback, func, thisArg) {
* var match = /^(.+?)__([gl]t)(.+)$/.exec(func);
* if (!match) {
* return callback(func, thisArg);
* }
* return function(object) {
* return match[2] == 'gt'
* ? object[match[1]] > match[3]
* : object[match[1]] < match[3];
* };
* });
*
* _.filter(users, 'age__gt36');
* // => [{ 'user': 'fred', 'age': 40 }]
*/
function iteratee$1(func) {
return (isObjectLike(func) && !isArray(func))
? matches(func)
: baseIteratee(func);
}
/**
* Creates a function that invokes `iteratees` with the arguments provided
* to the created function and returns their results.
*
* @static
* @memberOf _
* @category Utility
* @param {...(Function|Function[])} iteratees The iteratees to invoke.
* @returns {Function} Returns the new function.
* @example
*
* var juxted = _.juxt(Math.max, Math.min);
*
* juxted(1, 2, 3, 4);
* // => [4, 1]
*/
var juxt = createInvoker(arrayMap);
/**
* Converts `string` to [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the kebab cased string.
* @example
*
* _.kebabCase('Foo Bar');
* // => 'foo-bar'
*
* _.kebabCase('fooBar');
* // => 'foo-bar'
*
* _.kebabCase('__foo_bar__');
* // => 'foo-bar'
*/
var kebabCase = createCompounder(function(result, word, index) {
return result + (index ? '-' : '') + word.toLowerCase();
});
/**
* Creates an object composed of keys generated from the results of running
* each element of `collection` through `iteratee`. The corresponding value
* of each key is the last element responsible for generating the key. The
* iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Object} Returns the composed aggregate object.
* @example
*
* var keyData = [
* { 'dir': 'left', 'code': 97 },
* { 'dir': 'right', 'code': 100 }
* ];
*
* _.keyBy(keyData, 'dir');
* // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
*
* _.keyBy(keyData, function(o) {
* return String.fromCharCode(o.code);
* });
* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
*/
var keyBy = createAggregator(function(result, value, key) {
result[key] = value;
});
var nativeMax$5 = Math.max;
var nativeMin$1 = Math.min;
/**
* This method is like `_.indexOf` except that it iterates over elements of
* `array` from right to left.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @param {number} [fromIndex=array.length-1] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.lastIndexOf([1, 2, 1, 2], 2);
* // => 3
*
* // using `fromIndex`
* _.lastIndexOf([1, 2, 1, 2], 2, 2);
* // => 1
*/
function lastIndexOf(array, value, fromIndex) {
var length = array ? array.length : 0;
if (!length) {
return -1;
}
var index = length;
if (fromIndex !== undefined) {
index = toInteger(fromIndex);
index = (index < 0 ? nativeMax$5(length + index, 0) : nativeMin$1(index, length - 1)) + 1;
}
if (value !== value) {
return indexOfNaN(array, index, true);
}
while (index--) {
if (array[index] === value) {
return index;
}
}
return -1;
}
/**
* Converts `string`, as space separated words, to lower case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the lower cased string.
* @example
*
* _.lowerCase('--Foo-Bar');
* // => 'foo bar'
*
* _.lowerCase('fooBar');
* // => 'foo bar'
*
* _.lowerCase('__FOO_BAR__');
* // => 'foo bar'
*/
var lowerCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + word.toLowerCase();
});
/**
* Converts the first character of `string` to lower case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the converted string.
* @example
*
* _.lowerFirst('Fred');
* // => 'fred'
*
* _.lowerFirst('FRED');
* // => 'fRED'
*/
var lowerFirst = createCaseFirst('toLowerCase');
/**
* Checks if `value` is less than `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than `other`, else `false`.
* @example
*
* _.lt(1, 3);
* // => true
*
* _.lt(3, 3);
* // => false
*
* _.lt(3, 1);
* // => false
*/
function lt(value, other) {
return value < other;
}
/**
* Checks if `value` is less than or equal to `other`.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if `value` is less than or equal to `other`, else `false`.
* @example
*
* _.lte(1, 3);
* // => true
*
* _.lte(3, 3);
* // => true
*
* _.lte(3, 1);
* // => false
*/
function lte(value, other) {
return value <= other;
}
/**
* The base implementation of `_.map` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function baseMap(collection, iteratee) {
var index = -1,
result = isArrayLike(collection) ? Array(collection.length) : [];
baseEach(collection, function(value, key, collection) {
result[++index] = iteratee(value, key, collection);
});
return result;
}
/**
* Creates an array of values by running each element in `collection` through
* `iteratee`. The iteratee is invoked with three arguments:
* (value, index|key, collection).
*
* Many lodash methods are guarded to work as iteratees for methods like
* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
*
* The guarded methods are:
* `ary`, `callback`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
* `fill`, `invert`, `parseInt`, `random`, `range`, `slice`, `some`, `sortBy`,
* `take`, `takeRight`, `template`, `trim`, `trimLeft`, `trimRight`, `uniq`,
* and `words`
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
* @example
*
* function square(n) {
* return n * n;
* }
*
* _.map([1, 2], square);
* // => [3, 6]
*
* _.map({ 'a': 1, 'b': 2 }, square);
* // => [3, 6] (iteration order is not guaranteed)
*
* var users = [
* { 'user': 'barney' },
* { 'user': 'fred' }
* ];
*
* // using the `_.property` callback shorthand
* _.map(users, 'user');
* // => ['barney', 'fred']
*/
function map(collection, iteratee) {
var func = isArray(collection) ? arrayMap : baseMap;
return func(collection, baseIteratee(iteratee, 3));
}
/**
* The opposite of `_.mapValues`; this method creates an object with the
* same values as `object` and keys generated by running each own enumerable
* property of `object` through `iteratee`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns the new mapped object.
* @example
*
* _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
* return key + value;
* });
* // => { 'a1': 1, 'b2': 2 }
*/
function mapKeys(object, iteratee) {
var result = {};
iteratee = baseIteratee(iteratee, 3);
baseForOwn(object, function(value, key, object) {
result[iteratee(value, key, object)] = value;
});
return result;
}
/**
* Creates an object with the same keys as `object` and values generated by
* running each own enumerable property of `object` through `iteratee`. The
* iteratee function is invoked with three arguments: (value, key, object).
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
* @returns {Object} Returns the new mapped object.
* @example
*
* var users = {
* 'fred': { 'user': 'fred', 'age': 40 },
* 'pebbles': { 'user': 'pebbles', 'age': 1 }
* };
*
* _.mapValues(users, function(o) { return o.age; });
* // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
*
* // using the `_.property` callback shorthand
* _.mapValues(users, 'age');
* // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
*/
function mapValues(object, iteratee) {
var result = {};
iteratee = baseIteratee(iteratee, 3);
baseForOwn(object, function(value, key, object) {
result[key] = iteratee(value, key, object);
});
return result;
}
/**
* Creates a function that performs a deep partial comparison between the
* value at `path` of a given object to `srcValue`, returning `true` if the
* object value is equivalent, else `false`.
*
* **Note:** This method supports comparing arrays, booleans, `Date` objects,
* numbers, `Object` objects, regexes, and strings.
*
* @static
* @memberOf _
* @category Utility
* @param {Array|string} path The path of the property to get.
* @param {*} srcValue The value to match.
* @returns {Function} Returns the new function.
* @example
*
* var users = [
* { 'user': 'barney' },
* { 'user': 'fred' }
* ];
*
* _.find(users, _.matchesProperty('user', 'fred'));
* // => { 'user': 'fred' }
*/
function matchesProperty(path, srcValue) {
return baseMatchesProperty(path, baseClone(srcValue, true));
}
/**
* The base implementation of methods like `_.max` and `_.min` which accepts a
* `comparator` to determine the extremum value.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {Function} comparator The function used to compare values.
* @returns {*} Returns the extremum value.
*/
function baseExtremum(array, iteratee, comparator) {
var index = -1,
length = array.length;
while (++index < length) {
var value = array[index],
current = iteratee(value);
if (current != null && (computed === undefined
? current === current
: comparator(current, computed)
)) {
var computed = current,
result = value;
}
}
return result;
}
/**
* Gets the maximum value of `array`. If `array` is empty or falsey
* `undefined` is returned.
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @returns {*} Returns the maximum value.
* @example
*
* _.max([4, 2, 8, 6]);
* // => 8
*
* _.max([]);
* // => undefined
*/
function max(array) {
return (array && array.length)
? baseExtremum(array, identity, gt)
: undefined;
}
/**
* This method is like `_.max` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* the value is ranked. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {*} Returns the maximum value.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* _.maxBy(users, function(o) { return o.age; });
* // => { 'user': 'fred', 'age': 40 }
*
* // using the `_.property` callback shorthand
* _.maxBy(users, 'age');
* // => { 'user': 'fred', 'age': 40 }
*/
function maxBy(array, iteratee) {
return (array && array.length)
? baseExtremum(array, baseIteratee(iteratee), gt)
: undefined;
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$3 = 'Expected a function';
/**
* Creates a function that memoizes the result of `func`. If `resolver` is
* provided it determines the cache key for storing the result based on the
* arguments provided to the memoized function. By default, the first argument
* provided to the memoized function is used as the map cache key. The `func`
* is invoked with the `this` binding of the memoized function.
*
* **Note:** The cache is exposed as the `cache` property on the memoized
* function. Its creation may be customized by replacing the `_.memoize.Cache`
* constructor with one whose instances implement the [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
* method interface of `get`, `has`, and `set`.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to have its output memoized.
* @param {Function} [resolver] The function to resolve the cache key.
* @returns {Function} Returns the new memoizing function.
* @example
*
* var object = { 'a': 1, 'b': 2 };
* var other = { 'c': 3, 'd': 4 };
*
* var values = _.memoize(_.values);
* values(object);
* // => [1, 2]
*
* values(other);
* // => [3, 4]
*
* object.a = 2;
* values(object);
* // => [1, 2]
*
* // modifying the result cache
* values.cache.set(object, ['a', 'b']);
* values(object);
* // => ['a', 'b']
*
* // replacing `_.memoize.Cache`
* _.memoize.Cache = WeakMap;
*/
function memoize(func, resolver) {
if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
throw new TypeError(FUNC_ERROR_TEXT$3);
}
var memoized = function() {
var args = arguments,
key = resolver ? resolver.apply(this, args) : args[0],
cache = memoized.cache;
if (cache.has(key)) {
return cache.get(key);
}
var result = func.apply(this, args);
memoized.cache = cache.set(key, result);
return result;
};
memoized.cache = new memoize.Cache;
return memoized;
}
// Assign cache to `_.memoize`.
memoize.Cache = MapCache;
/**
* Recursively merges own and inherited enumerable properties of source
* objects into the destination object, skipping source properties that resolve
* to `undefined`. Array and plain object properties are merged recursively.
* Other objects and value types are overriden by assignment. Source objects
* are applied from left to right. Subsequent sources overwrite property
* assignments of previous sources.
*
* **Note:** This method mutates `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The destination object.
* @param {...Object} [sources] The source objects.
* @returns {Object} Returns `object`.
* @example
*
* var users = {
* 'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
* };
*
* var ages = {
* 'data': [{ 'age': 36 }, { 'age': 40 }]
* };
*
* _.merge(users, ages);
* // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
*/
var merge = createAssigner(function(object, source) {
baseMerge(object, source);
});
/**
* Creates a function that invokes the method at `path` of a given object.
* Any additional arguments are provided to the invoked method.
*
* @static
* @memberOf _
* @category Utility
* @param {Array|string} path The path of the method to invoke.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {Function} Returns the new function.
* @example
*
* var objects = [
* { 'a': { 'b': { 'c': _.constant(2) } } },
* { 'a': { 'b': { 'c': _.constant(1) } } }
* ];
*
* _.map(objects, _.method('a.b.c'));
* // => [2, 1]
*
* _.invoke(_.sortBy(objects, _.method(['a', 'b', 'c'])), 'a.b.c');
* // => [1, 2]
*/
var method = rest(function(path, args) {
return function(object) {
return invokePath(object, path, args);
};
});
/**
* The opposite of `_.method`; this method creates a function that invokes
* the method at a given path of `object`. Any additional arguments are
* provided to the invoked method.
*
* @static
* @memberOf _
* @category Utility
* @param {Object} object The object to query.
* @param {...*} [args] The arguments to invoke the method with.
* @returns {Function} Returns the new function.
* @example
*
* var array = _.times(3, _.constant),
* object = { 'a': array, 'b': array, 'c': array };
*
* _.map(['a[2]', 'c[0]'], _.methodOf(object));
* // => [2, 0]
*
* _.map([['a', '2'], ['c', '0']], _.methodOf(object));
* // => [2, 0]
*/
var methodOf = rest(function(object, args) {
return function(path) {
return invokePath(object, path, args);
};
});
/**
* Gets the minimum value of `array`. If `array` is empty or falsey
* `undefined` is returned.
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @returns {*} Returns the minimum value.
* @example
*
* _.min([4, 2, 8, 6]);
* // => 2
*
* _.min([]);
* // => undefined
*/
function min(array) {
return (array && array.length)
? baseExtremum(array, identity, lt)
: undefined;
}
/**
* This method is like `_.min` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* the value is ranked. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {*} Returns the minimum value.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* _.minBy(users, function(o) { return o.age; });
* // => { 'user': 'barney', 'age': 36 }
*
* // using the `_.property` callback shorthand
* _.minBy(users, 'age');
* // => { 'user': 'barney', 'age': 36 }
*/
function minBy(array, iteratee) {
return (array && array.length)
? baseExtremum(array, baseIteratee(iteratee), lt)
: undefined;
}
/**
* Adds all own enumerable function properties of a source object to the
* destination object. If `object` is a function then methods are added to
* its prototype as well.
*
* **Note:** Use `_.runInContext` to create a pristine `lodash` function to
* avoid conflicts caused by modifying the original.
*
* @static
* @memberOf _
* @category Utility
* @param {Function|Object} [object=lodash] The destination object.
* @param {Object} source The object of functions to add.
* @param {Object} [options] The options object.
* @param {boolean} [options.chain=true] Specify whether the functions added
* are chainable.
* @returns {Function|Object} Returns `object`.
* @example
*
* function vowels(string) {
* return _.filter(string, function(v) {
* return /[aeiou]/i.test(v);
* });
* }
*
* _.mixin({ 'vowels': vowels });
* _.vowels('fred');
* // => ['e']
*
* _('fred').vowels().value();
* // => ['e']
*
* _.mixin({ 'vowels': vowels }, { 'chain': false });
* _('fred').vowels();
* // => ['e']
*/
function mixin(object, source, options) {
var props = keys(source),
methodNames = baseFunctions(source, props);
var chain = (isObject(options) && 'chain' in options) ? options.chain : true,
isFunc = isFunction(object);
arrayEach(methodNames, function(methodName) {
var func = source[methodName];
object[methodName] = func;
if (isFunc) {
object.prototype[methodName] = function() {
var chainAll = this.__chain__;
if (chain || chainAll) {
var result = object(this.__wrapped__),
actions = result.__actions__ = copyArray(this.__actions__);
actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
result.__chain__ = chainAll;
return result;
}
return func.apply(object, arrayPush([this.value()], arguments));
};
}
});
return object;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$5 = Math.min;
/**
* Creates a function like `_.modArgs`.
*
* @private
* @param {Function} resolver The function to resolve which invocation
* arguments are provided to each transform.
* @returns {Function} Returns the new arguments modifier function.
*/
function createModArgs(resolver) {
return rest(function(func, transforms) {
transforms = arrayMap(baseFlatten(transforms), baseIteratee);
var funcsLength = transforms.length;
return rest(function(args) {
var index = -1,
length = nativeMin$5(args.length, funcsLength),
modded = copyArray(args);
while (++index < length) {
modded[index] = transforms[index].apply(this, resolver(args[index], index, args));
}
return func.apply(this, modded);
});
});
}
/**
* Creates a function that invokes `func` with arguments modified by
* corresponding `transforms`.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to wrap.
* @param {...(Function|Function[])} [transforms] The functions to transform
* arguments, specified individually or in arrays.
* @returns {Function} Returns the new function.
* @example
*
* function doubled(n) {
* return n * 2;
* }
*
* function square(n) {
* return n * n;
* }
*
* var modded = _.modArgs(function(x, y) {
* return [x, y];
* }, square, doubled);
*
* modded(9, 3);
* // => [81, 6]
*
* modded(10, 5);
* // => [100, 10]
*/
var modArgs = createModArgs(function(value) {
return [value];
});
/**
* This method is like `_.modArgs` except that each of the `transforms` is
* provided the complete set of arguments the created function is invoked with.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to wrap.
* @param {...(Function|Function[])} [transforms] The functions to transform
* arguments, specified individually or in arrays.
* @returns {Function} Returns the new function.
* @example
*
* function divide(x, y) {
* return x / y;
* }
*
* function multiply(x, y) {
* return x * y;
* }
*
* var modded = _.modArgsSet(function(x, y) {
* return [x, y];
* }, multiply, divide);
*
* modded(9, 3);
* // => [27, 3]
*
* modded(10, 5);
* // => [50, 2]
*/
var modArgsSet = createModArgs(function(value, index, args) {
return args;
});
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$4 = 'Expected a function';
/**
* Creates a function that negates the result of the predicate `func`. The
* `func` predicate is invoked with the `this` binding and arguments of the
* created function.
*
* @static
* @memberOf _
* @category Function
* @param {Function} predicate The predicate to negate.
* @returns {Function} Returns the new function.
* @example
*
* function isEven(n) {
* return n % 2 == 0;
* }
*
* _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
* // => [1, 3, 5]
*/
function negate(predicate) {
if (typeof predicate != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$4);
}
return function() {
return !predicate.apply(this, arguments);
};
}
var mapTag$1 = '[object Map]';
var setTag$1 = '[object Set]';
var Symbol = root.Symbol;
var iteratorSymbol = typeof (iteratorSymbol = Symbol && Symbol.iterator) == 'symbol' ? iteratorSymbol : undefined;
/**
* Converts `value` to an array.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to convert.
* @returns {Array} Returns the converted array.
* @example
*
* (function() {
* return _.toArray(arguments).slice(1);
* }(1, 2, 3));
* // => [2, 3]
*/
function toArray(value) {
if (!value) {
return [];
}
if (isArrayLike(value)) {
return isString(value) ? stringToArray(value) : copyArray(value);
}
if (iteratorSymbol && value[iteratorSymbol]) {
return iteratorToArray(value[iteratorSymbol]());
}
var tag = getTag$1(value),
func = tag == mapTag$1 ? mapToArray : (tag == setTag$1 ? setToArray : values);
return func(value);
}
/**
* Gets the next value on a wrapped object following the
* [iterator protocol](https://mdn.io/iteration_protocols#iterator).
*
* @name next
* @memberOf _
* @category Chain
* @returns {Object} Returns the next iterator value.
* @example
*
* var wrapped = _([1, 2]);
*
* wrapped.next();
* // => { 'done': false, 'value': 1 }
*
* wrapped.next();
* // => { 'done': false, 'value': 2 }
*
* wrapped.next();
* // => { 'done': true, 'value': undefined }
*/
function wrapperNext() {
if (this.__values__ === undefined) {
this.__values__ = toArray(this.value());
}
var done = this.__index__ >= this.__values__.length,
value = done ? undefined : this.__values__[this.__index__++];
return { 'done': done, 'value': value };
}
/**
* Creates a function that returns its nth argument.
*
* @static
* @memberOf _
* @category Utility
* @param {number} [n=0] The index of the argument to return.
* @returns {Function} Returns the new function.
* @example
*
* var func = _.nthArg(1);
*
* func('a', 'b', 'c');
* // => 'b'
*/
function nthArg(n) {
n = toInteger(n);
return function() {
return arguments[n];
};
}
/**
* The base implementation of `_.pick` without support for individual
* property names.
*
* @private
* @param {Object} object The source object.
* @param {string[]} props The property names to pick.
* @returns {Object} Returns the new object.
*/
function basePick(object, props) {
object = Object(object);
return arrayReduce(props, function(result, key) {
if (key in object) {
result[key] = object[key];
}
return result;
}, {});
}
/**
* The opposite of `_.pick`; this method creates an object composed of the
* own and inherited enumerable properties of `object` that are not omitted.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {...(string|string[])} [props] The property names to omit, specified
* individually or in arrays..
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'user': 'fred', 'age': 40 };
*
* _.omit(object, 'user');
* // => { 'age': 40 }
*/
var omit = rest(function(object, props) {
if (object == null) {
return {};
}
props = arrayMap(baseFlatten(props), String);
return basePick(object, baseDifference(keysIn(object), props));
});
/**
* The base implementation of `_.forIn` without support for callback shorthands.
*
* @private
* @param {Object} object The object to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Object} Returns `object`.
*/
function baseForIn(object, iteratee) {
return object == null ? object : baseFor(object, iteratee, keysIn);
}
/**
* The base implementation of `_.pickBy` without support for callback shorthands.
*
* @private
* @param {Object} object The source object.
* @param {Function} predicate The function invoked per property.
* @returns {Object} Returns the new object.
*/
function basePickBy(object, predicate) {
var result = {};
baseForIn(object, function(value, key) {
if (predicate(value)) {
result[key] = value;
}
});
return result;
}
/**
* The opposite of `_.pickBy`; this method creates an object composed of the
* own and inherited enumerable properties of `object` that `predicate`
* doesn't return truthy for.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per property.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'user': 'fred', 'age': 40 };
*
* _.omitBy(object, _.isNumber);
* // => { 'user': 'fred' }
*/
function omitBy(object, predicate) {
predicate = baseIteratee(predicate);
return basePickBy(object, function(value) {
return !predicate(value);
});
}
/**
* Creates a function that is restricted to invoking `func` once. Repeat calls
* to the function return the value of the first call. The `func` is invoked
* with the `this` binding and arguments of the created function.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to restrict.
* @returns {Function} Returns the new restricted function.
* @example
*
* var initialize = _.once(createApplication);
* initialize();
* initialize();
* // `initialize` invokes `createApplication` once
*/
function once(func) {
return before(2, func);
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeFloor$1 = Math.floor;
/**
* Repeats the given string `n` times.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to repeat.
* @param {number} [n=0] The number of times to repeat the string.
* @returns {string} Returns the repeated string.
* @example
*
* _.repeat('*', 3);
* // => '***'
*
* _.repeat('abc', 2);
* // => 'abcabc'
*
* _.repeat('abc', 0);
* // => ''
*/
function repeat(string, n) {
string = toString(string);
n = toInteger(n);
var result = '';
if (!string || n < 1 || n > MAX_SAFE_INTEGER$1) {
return result;
}
// Leverage the exponentiation by squaring algorithm for a faster repeat.
// See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
do {
if (n % 2) {
result += string;
}
n = nativeFloor$1(n / 2);
string += string;
} while (n);
return result;
}
var rsAstralRange$3 = '\\ud800-\\udfff';
var rsComboRange$3 = '\\u0300-\\u036f\\ufe20-\\ufe23';
var rsVarRange$3 = '\\ufe0e\\ufe0f';
/** Used to compose unicode capture groups. */
var rsZWJ$3 = '\\u200d';
/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasComplexSymbol$2 = RegExp('[' + rsZWJ$3 + rsAstralRange$3 + rsComboRange$3 + rsVarRange$3 + ']');
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeCeil$3 = Math.ceil;
/**
* Creates the padding for `string` based on the given `length`. The `chars`
* string is truncated if the number of characters exceeds `length`.
*
* @private
* @param {string} string The string to create padding for.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padding for `string`.
*/
function createPadding(string, length, chars) {
length = toInteger(length);
var strLength = stringSize(string);
if (!length || strLength >= length) {
return '';
}
var padLength = length - strLength;
chars = chars === undefined ? ' ' : (chars + '');
var result = repeat(chars, nativeCeil$3(padLength / stringSize(chars)));
return reHasComplexSymbol$2.test(chars)
? stringToArray(result).slice(0, padLength).join('')
: result.slice(0, padLength);
}
var nativeCeil$1 = Math.ceil;
var nativeFloor = Math.floor;
/**
* Pads `string` on the left and right sides if it's shorter than `length`.
* Padding characters are truncated if they can't be evenly divided by `length`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.pad('abc', 8);
* // => ' abc '
*
* _.pad('abc', 8, '_-');
* // => '_-abc_-_'
*
* _.pad('abc', 3);
* // => 'abc'
*/
function pad(string, length, chars) {
string = toString(string);
length = toInteger(length);
var strLength = stringSize(string);
if (!length || strLength >= length) {
return string;
}
var mid = (length - strLength) / 2,
leftLength = nativeFloor(mid),
rightLength = nativeCeil$1(mid);
return createPadding('', leftLength, chars) + string + createPadding('', rightLength, chars);
}
/**
* Pads `string` on the left side if it's shorter than `length`. Padding
* characters are truncated if they exceed `length`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.padLeft('abc', 6);
* // => ' abc'
*
* _.padLeft('abc', 6, '_-');
* // => '_-_abc'
*
* _.padLeft('abc', 3);
* // => 'abc'
*/
function padLeft(string, length, chars) {
string = toString(string);
return createPadding(string, length, chars) + string;
}
/**
* Pads `string` on the right side if it's shorter than `length`. Padding
* characters are truncated if they exceed `length`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to pad.
* @param {number} [length=0] The padding length.
* @param {string} [chars=' '] The string used as padding.
* @returns {string} Returns the padded string.
* @example
*
* _.padRight('abc', 6);
* // => 'abc '
*
* _.padRight('abc', 6, '_-');
* // => 'abc_-_'
*
* _.padRight('abc', 3);
* // => 'abc'
*/
function padRight(string, length, chars) {
string = toString(string);
return string + createPadding(string, length, chars);
}
/**
* Used by `_.trim` and `_.trimLeft` to get the index of the first string symbol
* that is not found in the character symbols.
*
* @private
* @param {Array} strSymbols The string symbols to inspect.
* @param {Array} chrSymbols The character symbols to find.
* @returns {number} Returns the index of the first unmatched string symbol.
*/
function charsLeftIndex(strSymbols, chrSymbols) {
var index = -1,
length = strSymbols.length;
while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
return index;
}
/**
* Used by `_.trim` and `_.trimRight` to get the index of the last string symbol
* that is not found in the character symbols.
*
* @private
* @param {Array} strSymbols The string symbols to inspect.
* @param {Array} chrSymbols The character symbols to find.
* @returns {number} Returns the index of the last unmatched string symbol.
*/
function charsRightIndex(strSymbols, chrSymbols) {
var index = strSymbols.length;
while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
return index;
}
/**
* Used by `trimmedLeftIndex` and `trimmedRightIndex` to determine if a
* character code is whitespace.
*
* @private
* @param {number} charCode The character code to inspect.
* @returns {boolean} Returns `true` if `charCode` is whitespace, else `false`.
*/
function isSpace(charCode) {
return ((charCode <= 160 && (charCode >= 9 && charCode <= 13) || charCode == 32 || charCode == 160) || charCode == 5760 || charCode == 6158 ||
(charCode >= 8192 && (charCode <= 8202 || charCode == 8232 || charCode == 8233 || charCode == 8239 || charCode == 8287 || charCode == 12288 || charCode == 65279)));
}
/**
* Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace
* character of `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the index of the first non-whitespace character.
*/
function trimmedLeftIndex(string) {
var index = -1,
length = string.length;
while (++index < length && isSpace(string.charCodeAt(index))) {}
return index;
}
/**
* Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
* character of `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the index of the last non-whitespace character.
*/
function trimmedRightIndex(string) {
var index = string.length;
while (index-- && isSpace(string.charCodeAt(index))) {}
return index;
}
/**
* Removes leading and trailing whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trim(' abc ');
* // => 'abc'
*
* _.trim('-_-abc-_-', '_-');
* // => 'abc'
*
* _.map([' foo ', ' bar '], _.trim);
* // => ['foo', 'bar']
*/
function trim(string, chars, guard) {
string = toString(string);
if (!string) {
return string;
}
if (guard || chars === undefined) {
return string.slice(trimmedLeftIndex(string), trimmedRightIndex(string) + 1);
}
chars = (chars + '');
if (!chars) {
return string;
}
var strSymbols = stringToArray(string),
chrSymbols = stringToArray(chars);
return strSymbols.slice(charsLeftIndex(strSymbols, chrSymbols), charsRightIndex(strSymbols, chrSymbols) + 1).join('');
}
/** Used to detect hexadecimal string values. */
var reHasHexPrefix = /^0[xX]/;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeParseInt = root.parseInt;
/**
* Converts `string` to an integer of the specified radix. If `radix` is
* `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal,
* in which case a `radix` of `16` is used.
*
* **Note:** This method aligns with the [ES5 implementation](https://es5.github.io/#E)
* of `parseInt`.
*
* @static
* @memberOf _
* @category String
* @param {string} string The string to convert.
* @param {number} [radix] The radix to interpret `value` by.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {number} Returns the converted integer.
* @example
*
* _.parseInt('08');
* // => 8
*
* _.map(['6', '08', '10'], _.parseInt);
* // => [6, 8, 10]
*/
function parseInt(string, radix, guard) {
// Chrome fails to trim leading <BOM> whitespace characters.
// See https://code.google.com/p/v8/issues/detail?id=3109 for more details.
if (guard || radix == null) {
radix = 0;
} else if (radix) {
radix = +radix;
}
string = trim(string);
return nativeParseInt(string, radix || (reHasHexPrefix.test(string) ? 16 : 10));
}
/** Used to compose bitmasks for wrapper metadata. */
var PARTIAL_FLAG$2 = 32;
/**
* Creates a function that invokes `func` with `partial` arguments prepended
* to those provided to the new function. This method is like `_.bind` except
* it does **not** alter the `this` binding.
*
* The `_.partial.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* **Note:** This method doesn't set the "length" property of partially
* applied functions.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to partially apply arguments to.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new partially applied function.
* @example
*
* var greet = function(greeting, name) {
* return greeting + ' ' + name;
* };
*
* var sayHelloTo = _.partial(greet, 'hello');
* sayHelloTo('fred');
* // => 'hello fred'
*
* // using placeholders
* var greetFred = _.partial(greet, _, 'fred');
* greetFred('hi');
* // => 'hi fred'
*/
var partial = rest(function(func, partials) {
var holders = replaceHolders(partials, partial.placeholder);
return createWrapper(func, PARTIAL_FLAG$2, undefined, partials, holders);
});
/** Used to compose bitmasks for wrapper metadata. */
var PARTIAL_RIGHT_FLAG = 64;
/**
* This method is like `_.partial` except that partially applied arguments
* are appended to those provided to the new function.
*
* The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
* builds, may be used as a placeholder for partially applied arguments.
*
* **Note:** This method doesn't set the "length" property of partially
* applied functions.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to partially apply arguments to.
* @param {...*} [partials] The arguments to be partially applied.
* @returns {Function} Returns the new partially applied function.
* @example
*
* var greet = function(greeting, name) {
* return greeting + ' ' + name;
* };
*
* var greetFred = _.partialRight(greet, 'fred');
* greetFred('hi');
* // => 'hi fred'
*
* // using placeholders
* var sayHelloTo = _.partialRight(greet, 'hello', _);
* sayHelloTo('fred');
* // => 'hello fred'
*/
var partialRight = rest(function(func, partials) {
var holders = replaceHolders(partials, partialRight.placeholder);
return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
});
/**
* Creates an array of elements split into two groups, the first of which
* contains elements `predicate` returns truthy for, while the second of which
* contains elements `predicate` returns falsey for. The predicate is invoked
* with three arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the array of grouped elements.
* @example
*
* var resolve = function(result) {
* return _.map(result, function(array) { return _.map(array, 'user'); });
* };
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'age': 40, 'active': true },
* { 'user': 'pebbles', 'age': 1, 'active': false }
* ];
*
* resolve( _.partition(users, function(o) { return o.active; }) );
* // => [['fred'], ['barney', 'pebbles']]
*
* // using the `_.matches` callback shorthand
* resolve( _.partition(users, { 'age': 1, 'active': false }) );
* // => [['pebbles'], ['barney', 'fred']]
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.partition(users, ['active', false]) );
* // => [['barney', 'pebbles'], ['fred']]
*
* // using the `_.property` callback shorthand
* resolve( _.partition(users, 'active') );
* // => [['fred'], ['barney', 'pebbles']]
*/
var partition = createAggregator(function(result, value, key) {
result[key ? 0 : 1].push(value);
}, function() { return [[], []]; });
/**
* Creates an object composed of the picked `object` properties.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {...(string|string[])} [props] The property names to pick, specified
* individually or in arrays.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'user': 'fred', 'age': 40 };
*
* _.pick(object, 'user');
* // => { 'user': 'fred' }
*/
var pick = rest(function(object, props) {
return object == null ? {} : basePick(object, baseFlatten(props));
});
/**
* Creates an object composed of the `object` properties `predicate` returns
* truthy for. The predicate is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The source object.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per property.
* @returns {Object} Returns the new object.
* @example
*
* var object = { 'user': 'fred', 'age': 40 };
*
* _.pickBy(object, _.isNumber);
* // => { 'age': 40 }
*/
function pickBy(object, predicate) {
return object == null ? {} : basePickBy(object, baseIteratee(predicate));
}
/**
* Creates a clone of the chained sequence planting `value` as the wrapped value.
*
* @name plant
* @memberOf _
* @category Chain
* @param {*} value The value to plant.
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* function square(n) {
* return n * n;
* }
*
* var wrapped = _([1, 2]).map(square);
* var other = wrapped.plant([3, 4]);
*
* other.value();
* // => [9, 16]
*
* wrapped.value();
* // => [1, 4]
*/
function wrapperPlant(value) {
var result,
parent = this;
while (parent instanceof baseLodash) {
var clone = wrapperClone(parent);
clone.__index__ = 0;
clone.__values__ = undefined;
if (result) {
previous.__wrapped__ = clone;
} else {
result = clone;
}
var previous = clone;
parent = parent.__wrapped__;
}
previous.__wrapped__ = value;
return result;
}
/**
* The opposite of `_.property`; this method creates a function that returns
* the value at a given path of `object`.
*
* @static
* @memberOf _
* @category Utility
* @param {Object} object The object to query.
* @returns {Function} Returns the new function.
* @example
*
* var array = [0, 1, 2],
* object = { 'a': array, 'b': array, 'c': array };
*
* _.map(['a[2]', 'c[0]'], _.propertyOf(object));
* // => [2, 0]
*
* _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
* // => [2, 0]
*/
function propertyOf(object) {
return function(path) {
return object == null ? undefined : baseGet(object, path);
};
}
/** Used for built-in method references. */
var arrayProto$2 = Array.prototype;
/** Built-in value references. */
var splice = arrayProto$2.splice;
/**
* The base implementation of `_.pullAllBy` without support for callback
* shorthands.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns `array`.
*/
function basePullAllBy(array, values, iteratee) {
var index = -1,
length = values.length,
seen = array;
if (iteratee) {
seen = arrayMap(array, function(value) { return iteratee(value); });
}
while (++index < length) {
var fromIndex = 0,
value = values[index],
computed = iteratee ? iteratee(value) : value;
while ((fromIndex = baseIndexOf(seen, computed, fromIndex)) > -1) {
if (seen !== array) {
splice.call(seen, fromIndex, 1);
}
splice.call(array, fromIndex, 1);
}
}
return array;
}
/**
* The base implementation of `_.pullAll`.
*
* @private
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @returns {Array} Returns `array`.
*/
function basePullAll(array, values) {
return basePullAllBy(array, values);
}
/**
* This method is like `_.pull` except that it accepts an array of values to remove.
*
* **Note:** Unlike `_.difference`, this method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3, 1, 2, 3];
*
* _.pull(array, [2, 3]);
* console.log(array);
* // => [1, 1]
*/
function pullAll(array, values) {
return (array && array.length && values && values.length)
? basePullAll(array, values)
: array;
}
/**
* Removes all provided values from `array` using
* [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* **Note:** Unlike `_.without`, this method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to modify.
* @param {...*} [values] The values to remove.
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3, 1, 2, 3];
*
* _.pull(array, 2, 3);
* console.log(array);
* // => [1, 1]
*/
var pull = rest(pullAll);
/**
* This method is like `_.pullAll` except that it accepts `iteratee` which is
* invoked for each element of `array` and `values` to to generate the criterion
* by which uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* **Note:** Unlike `_.differenceBy`, this method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to modify.
* @param {Array} values The values to remove.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns `array`.
* @example
*
* var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
*
* _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], function(o) { return o.x; });
* console.log(array);
* // => [{ 'x': 2 }]
*/
function pullAllBy(array, values, iteratee) {
return (array && array.length && values && values.length)
? basePullAllBy(array, values, baseIteratee(iteratee))
: array;
}
/** Used for built-in method references. */
var arrayProto$3 = Array.prototype;
/** Built-in value references. */
var splice$1 = arrayProto$3.splice;
/**
* The base implementation of `_.pullAt` without support for individual
* index arguments or capturing the removed elements.
*
* @private
* @param {Array} array The array to modify.
* @param {number[]} indexes The indexes of elements to remove.
* @returns {Array} Returns `array`.
*/
function basePullAt(array, indexes) {
var length = array ? indexes.length : 0,
lastIndex = length - 1;
while (length--) {
var index = indexes[length];
if (lastIndex == length || index != previous) {
var previous = index;
if (isIndex(index)) {
splice$1.call(array, index, 1);
}
else if (!isKey(index, array)) {
var path = baseToPath(index),
object = parent$1(array, path);
if (object != null) {
delete object[last(path)];
}
}
else {
delete array[index];
}
}
}
return array;
}
/**
* Compares values to sort them in ascending order.
*
* @private
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {number} Returns the sort order indicator for `value`.
*/
function compareAscending(value, other) {
if (value !== other) {
var valIsNull = value === null,
valIsUndef = value === undefined,
valIsReflexive = value === value;
var othIsNull = other === null,
othIsUndef = other === undefined,
othIsReflexive = other === other;
if ((value > other && !othIsNull) || !valIsReflexive ||
(valIsNull && !othIsUndef && othIsReflexive) ||
(valIsUndef && othIsReflexive)) {
return 1;
}
if ((value < other && !valIsNull) || !othIsReflexive ||
(othIsNull && !valIsUndef && valIsReflexive) ||
(othIsUndef && valIsReflexive)) {
return -1;
}
}
return 0;
}
/**
* Removes elements from `array` corresponding to `indexes` and returns an
* array of removed elements.
*
* **Note:** Unlike `_.at`, this method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to modify.
* @param {...(number|number[])} [indexes] The indexes of elements to remove,
* specified individually or in arrays.
* @returns {Array} Returns the new array of removed elements.
* @example
*
* var array = [5, 10, 15, 20];
* var evens = _.pullAt(array, 1, 3);
*
* console.log(array);
* // => [5, 15]
*
* console.log(evens);
* // => [10, 20]
*/
var pullAt = rest(function(array, indexes) {
indexes = arrayMap(baseFlatten(indexes), String);
var result = baseAt(array, indexes);
basePullAt(array, indexes.sort(compareAscending));
return result;
});
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeFloor$2 = Math.floor;
var nativeRandom$1 = Math.random;
/**
* The base implementation of `_.random` without support for returning
* floating-point numbers.
*
* @private
* @param {number} min The minimum possible value.
* @param {number} max The maximum possible value.
* @returns {number} Returns the random number.
*/
function baseRandom(min, max) {
return min + nativeFloor$2(nativeRandom$1() * (max - min + 1));
}
var nativeMin$2 = Math.min;
var nativeRandom = Math.random;
/**
* Produces a random number between `min` and `max` (inclusive). If only one
* argument is provided a number between `0` and the given number is returned.
* If `floating` is `true`, or either `min` or `max` are floats, a
* floating-point number is returned instead of an integer.
*
* **Note:** JavaScript follows the IEEE-754 standard for resolving
* floating-point values which can produce unexpected results.
*
* @static
* @memberOf _
* @category Number
* @param {number} [min=0] The minimum possible value.
* @param {number} [max=1] The maximum possible value.
* @param {boolean} [floating] Specify returning a floating-point number.
* @returns {number} Returns the random number.
* @example
*
* _.random(0, 5);
* // => an integer between 0 and 5
*
* _.random(5);
* // => also an integer between 0 and 5
*
* _.random(5, true);
* // => a floating-point number between 0 and 5
*
* _.random(1.2, 5.2);
* // => a floating-point number between 1.2 and 5.2
*/
function random(min, max, floating) {
if (floating && isIterateeCall(min, max, floating)) {
max = floating = undefined;
}
var noMin = min === undefined,
noMax = max === undefined;
if (floating === undefined) {
if (noMax && typeof min == 'boolean') {
floating = min;
min = 1;
}
else if (typeof max == 'boolean') {
floating = max;
noMax = true;
}
}
if (noMin && noMax) {
max = 1;
noMax = false;
}
min = +min || 0;
if (noMax) {
max = min;
min = 0;
} else {
max = +max || 0;
}
if (floating || min % 1 || max % 1) {
var rand = nativeRandom();
return nativeMin$2(min + (rand * (max - min + parseFloat('1e-' + ((rand + '').length - 1)))), max);
}
return baseRandom(min, max);
}
var nativeCeil$2 = Math.ceil;
var nativeMax$6 = Math.max;
/**
* Creates an array of numbers (positive and/or negative) progressing from
* `start` up to, but not including, `end`. If `end` is not specified it's
* set to `start` with `start` then set to `0`. If `end` is less than `start`
* a zero-length range is created unless a negative `step` is specified.
*
* **Note:** JavaScript follows the IEEE-754 standard for resolving
* floating-point values which can produce unexpected results.
*
* @static
* @memberOf _
* @category Utility
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @param {number} [step=1] The value to increment or decrement by.
* @returns {Array} Returns the new array of numbers.
* @example
*
* _.range(4);
* // => [0, 1, 2, 3]
*
* _.range(1, 5);
* // => [1, 2, 3, 4]
*
* _.range(0, 20, 5);
* // => [0, 5, 10, 15]
*
* _.range(0, -4, -1);
* // => [0, -1, -2, -3]
*
* _.range(1, 4, 0);
* // => [1, 1, 1]
*
* _.range(0);
* // => []
*/
function range(start, end, step) {
if (step && isIterateeCall(start, end, step)) {
end = step = undefined;
}
start = +start;
start = start === start ? start : 0;
step = step === undefined ? 1 : (+step || 0);
if (end === undefined) {
end = start;
start = 0;
} else {
end = +end || 0;
}
var n = nativeMax$6(nativeCeil$2((end - start) / (step || 1)), 0);
return baseTimes(n, function(index) {
return index ? (start += step) : start;
});
}
/** Used to compose bitmasks for wrapper metadata. */
var REARG_FLAG = 256;
/**
* Creates a function that invokes `func` with arguments arranged according
* to the specified indexes where the argument value at the first index is
* provided as the first argument, the argument value at the second index is
* provided as the second argument, and so on.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to rearrange arguments for.
* @param {...(number|number[])} indexes The arranged argument indexes,
* specified individually or in arrays.
* @returns {Function} Returns the new function.
* @example
*
* var rearged = _.rearg(function(a, b, c) {
* return [a, b, c];
* }, 2, 0, 1);
*
* rearged('b', 'c', 'a')
* // => ['a', 'b', 'c']
*/
var rearg = rest(function(func, indexes) {
return createWrapper(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes));
});
/**
* The base implementation of `_.reduce` and `_.reduceRight` without support
* for callback shorthands, which iterates over `collection` using the provided
* `eachFunc`.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} accumulator The initial value.
* @param {boolean} initFromCollection Specify using the first or last element of `collection` as the initial value.
* @param {Function} eachFunc The function to iterate over `collection`.
* @returns {*} Returns the accumulated value.
*/
function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) {
eachFunc(collection, function(value, index, collection) {
accumulator = initFromCollection
? (initFromCollection = false, value)
: iteratee(accumulator, value, index, collection);
});
return accumulator;
}
/**
* Reduces `collection` to a value which is the accumulated result of running
* each element in `collection` through `iteratee`, where each successive
* invocation is supplied the return value of the previous. If `accumulator`
* is not provided the first element of `collection` is used as the initial
* value. The iteratee is invoked with four arguments:
* (accumulator, value, index|key, collection).
*
* Many lodash methods are guarded to work as iteratees for methods like
* `_.reduce`, `_.reduceRight`, and `_.transform`.
*
* The guarded methods are:
* `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `sortBy`,
* and `sortByOrder`
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @returns {*} Returns the accumulated value.
* @example
*
* _.reduce([1, 2], function(sum, n) {
* return sum + n;
* });
* // => 3
*
* _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
* (result[value] || (result[value] = [])).push(key);
* return result;
* }, {});
* // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
*/
function reduce(collection, iteratee, accumulator) {
var initFromCollection = arguments.length < 3;
return (typeof iteratee == 'function' && isArray(collection))
? arrayReduce(collection, iteratee, accumulator, initFromCollection)
: baseReduce(collection, baseIteratee(iteratee, 4), accumulator, initFromCollection, baseEach);
}
/**
* A specialized version of `_.reduceRight` for arrays without support for
* callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @param {boolean} [initFromArray] Specify using the last element of `array` as the initial value.
* @returns {*} Returns the accumulated value.
*/
function arrayReduceRight(array, iteratee, accumulator, initFromArray) {
var length = array.length;
if (initFromArray && length) {
accumulator = array[--length];
}
while (length--) {
accumulator = iteratee(accumulator, array[length], length, array);
}
return accumulator;
}
/**
* This method is like `_.reduce` except that it iterates over elements of
* `collection` from right to left.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The initial value.
* @returns {*} Returns the accumulated value.
* @example
*
* var array = [[0, 1], [2, 3], [4, 5]];
*
* _.reduceRight(array, function(flattened, other) {
* return flattened.concat(other);
* }, []);
* // => [4, 5, 2, 3, 0, 1]
*/
function reduceRight(collection, iteratee, accumulator) {
var initFromCollection = arguments.length < 3;
return (typeof iteratee == 'function' && isArray(collection))
? arrayReduceRight(collection, iteratee, accumulator, initFromCollection)
: baseReduce(collection, baseIteratee(iteratee, 4), accumulator, initFromCollection, baseEachRight);
}
/**
* The opposite of `_.filter`; this method returns the elements of `collection`
* that `predicate` does **not** return truthy for.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new filtered array.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'age': 36, 'active': false },
* { 'user': 'fred', 'age': 40, 'active': true }
* ];
*
* resolve( _.reject(users, function(o) { return !o.active; }) );
* // => ['fred']
*
* // using the `_.matches` callback shorthand
* resolve( _.reject(users, { 'age': 40, 'active': true }) );
* // => ['barney']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.reject(users, ['active', false]) );
* // => ['fred']
*
* // using the `_.property` callback shorthand
* resolve( _.reject(users, 'active') );
* // => ['barney']
*/
function reject(collection, predicate) {
var func = isArray(collection) ? arrayFilter : baseFilter;
predicate = baseIteratee(predicate, 3);
return func(collection, function(value, index, collection) {
return !predicate(value, index, collection);
});
}
/**
* Removes all elements from `array` that `predicate` returns truthy for
* and returns an array of the removed elements. The predicate is invoked with
* three arguments: (value, index, array).
*
* **Note:** Unlike `_.filter`, this method mutates `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to modify.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the new array of removed elements.
* @example
*
* var array = [1, 2, 3, 4];
* var evens = _.remove(array, function(n) {
* return n % 2 == 0;
* });
*
* console.log(array);
* // => [1, 3]
*
* console.log(evens);
* // => [2, 4]
*/
function remove(array, predicate) {
var result = [];
if (!(array && array.length)) {
return result;
}
var index = -1,
indexes = [],
length = array.length;
predicate = baseIteratee(predicate, 3);
while (++index < length) {
var value = array[index];
if (predicate(value, index, array)) {
result.push(value);
indexes.push(index);
}
}
basePullAt(array, indexes);
return result;
}
/**
* This method is like `_.get` except that if the resolved value is a function
* it's invoked with the `this` binding of its parent object and its result
* is returned.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to resolve.
* @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
* @returns {*} Returns the resolved value.
* @example
*
* var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
*
* _.result(object, 'a[0].b.c1');
* // => 3
*
* _.result(object, 'a[0].b.c2');
* // => 4
*
* _.result(object, 'a.b.c', 'default');
* // => 'default'
*
* _.result(object, 'a.b.c', _.constant('default'));
* // => 'default'
*/
function result$1(object, path, defaultValue) {
if (!isKey(path, object)) {
path = baseToPath(path);
var result = get(object, path);
object = parent$1(object, path);
} else {
result = object == null ? undefined : object[path];
}
if (result === undefined) {
result = defaultValue;
}
return isFunction(result) ? result.call(object) : result;
}
/** Used for built-in method references. */
var arrayProto = Array.prototype;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeReverse = arrayProto.reverse;
/**
* Reverses `array` so that the first element becomes the last, the second
* element becomes the second to last, and so on.
*
* **Note:** This method mutates `array`.
*
* @memberOf _
* @category Array
* @returns {Array} Returns `array`.
* @example
*
* var array = [1, 2, 3];
*
* _.reverse(array);
* // => [3, 2, 1]
*
* console.log(array);
* // => [3, 2, 1]
*/
function reverse(array) {
return array ? nativeReverse.call(array) : array;
}
/**
* Calculates `number` rounded to `precision`.
*
* @static
* @memberOf _
* @category Math
* @param {number} number The number to round.
* @param {number} [precision=0] The precision to round to.
* @returns {number} Returns the rounded number.
* @example
*
* _.round(4.006);
* // => 4
*
* _.round(4.006, 2);
* // => 4.01
*
* _.round(4060, -2);
* // => 4100
*/
var round = createRound('round');
/**
* Gets a random element from `collection`.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to sample.
* @returns {*} Returns the random element.
* @example
*
* _.sample([1, 2, 3, 4]);
* // => 2
*/
function sample(collection) {
var array = isArrayLike(collection) ? collection : values(collection),
length = array.length;
return length > 0 ? array[baseRandom(0, length - 1)] : undefined;
}
/**
* Gets `n` random elements from `collection`.
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to sample.
* @param {number} [n=0] The number of elements to sample.
* @returns {Array} Returns the random elements.
* @example
*
* _.sampleSize([1, 2, 3, 4], 2);
* // => [3, 1]
*/
function sampleSize(collection, n) {
var index = -1,
result = toArray(collection),
length = result.length,
lastIndex = length - 1;
n = clamp(toInteger(n), 0, length);
while (++index < n) {
var rand = baseRandom(index, lastIndex),
value = result[rand];
result[rand] = result[index];
result[index] = value;
}
result.length = n;
return result;
}
/**
* The base implementation of `_.set`.
*
* @private
* @param {Object} object The object to query.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @param {Function} [customizer] The function to customize path creation.
* @returns {Object} Returns `object`.
*/
function baseSet(object, path, value, customizer) {
path = isKey(path, object) ? [path + ''] : baseToPath(path);
var index = -1,
length = path.length,
lastIndex = length - 1,
nested = object;
while (nested != null && ++index < length) {
var key = path[index];
if (isObject(nested)) {
var newValue = value;
if (index != lastIndex) {
var oldValue = nested[key];
newValue = customizer ? customizer(oldValue, key, nested) : undefined;
if (newValue === undefined) {
newValue = oldValue == null ? (isIndex(path[index + 1]) ? [] : {}) : oldValue;
}
}
assignValue(nested, key, newValue);
}
nested = nested[key];
}
return object;
}
/**
* Sets the value at `path` of `object`. If a portion of `path` doesn't
* exist it's created.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @returns {Object} Returns `object`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
*
* _.set(object, 'a[0].b.c', 4);
* console.log(object.a[0].b.c);
* // => 4
*
* _.set(object, 'x[0].y.z', 5);
* console.log(object.x[0].y.z);
* // => 5
*/
function set(object, path, value) {
return object == null ? object : baseSet(object, path, value);
}
/**
* This method is like `_.set` except that it accepts `customizer` which is
* invoked to produce the objects of `path`. If `customizer` returns `undefined`
* path creation is handled by the method instead. The `customizer` is invoked
* with three arguments: (nsValue, key, nsObject).
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to set.
* @param {*} value The value to set.
* @param {Function} [customizer] The function to customize assigned values.
* @returns {Object} Returns `object`.
* @example
*
* function customizer(nsValue) {
* if (!_.isObject(nsValue)) {
* return {};
* }
* }
*
* _.setWith({ '0': { 'length': 2 } }, '[0][1][2]', 3, customizer);
* // => { '0': { '1': { '2': 3 }, 'length': 2 } }
*/
function setWith(object, path, value, customizer) {
customizer = typeof customizer == 'function' ? customizer : undefined;
return object == null ? object : baseSet(object, path, value, customizer);
}
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295;
/**
* Creates an array of shuffled values, using a version of the
* [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to shuffle.
* @returns {Array} Returns the new shuffled array.
* @example
*
* _.shuffle([1, 2, 3, 4]);
* // => [4, 1, 3, 2]
*/
function shuffle(collection) {
return sampleSize(collection, MAX_ARRAY_LENGTH);
}
/**
* Creates a slice of `array` from `start` up to, but not including, `end`.
*
* **Note:** This method is used instead of `Array#slice` to ensure dense
* arrays are returned.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to slice.
* @param {number} [start=0] The start position.
* @param {number} [end=array.length] The end position.
* @returns {Array} Returns the slice of `array`.
*/
function slice(array, start, end) {
var length = array ? array.length : 0;
if (!length) {
return [];
}
if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
start = 0;
end = length;
}
return baseSlice(array, start, end);
}
/**
* Converts `string` to [snake case](https://en.wikipedia.org/wiki/Snake_case).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the snake cased string.
* @example
*
* _.snakeCase('Foo Bar');
* // => 'foo_bar'
*
* _.snakeCase('fooBar');
* // => 'foo_bar'
*
* _.snakeCase('--foo-bar');
* // => 'foo_bar'
*/
var snakeCase = createCompounder(function(result, word, index) {
return result + (index ? '_' : '') + word.toLowerCase();
});
/**
* The base implementation of `_.some` without support for callback shorthands.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function} predicate The function invoked per iteration.
* @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
*/
function baseSome(collection, predicate) {
var result;
baseEach(collection, function(value, index, collection) {
result = predicate(value, index, collection);
return !result;
});
return !!result;
}
/**
* Checks if `predicate` returns truthy for **any** element of `collection`.
* Iteration is stopped once `predicate` returns truthy. The predicate is
* invoked with three arguments: (value, index|key, collection).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
* @example
*
* _.some([null, 0, 'yes', false], Boolean);
* // => true
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false }
* ];
*
* // using the `_.matches` callback shorthand
* _.some(users, { 'user': 'barney', 'active': false });
* // => false
*
* // using the `_.matchesProperty` callback shorthand
* _.some(users, ['active', false]);
* // => true
*
* // using the `_.property` callback shorthand
* _.some(users, 'active');
* // => true
*/
function some(collection, predicate, guard) {
var func = isArray(collection) ? arraySome : baseSome;
if (guard && isIterateeCall(collection, predicate, guard)) {
predicate = undefined;
}
return func(collection, baseIteratee(predicate, 3));
}
/**
* The base implementation of `_.sortBy` which uses `comparer` to define
* the sort order of `array` and replaces criteria objects with their
* corresponding values.
*
* @private
* @param {Array} array The array to sort.
* @param {Function} comparer The function to define sort order.
* @returns {Array} Returns `array`.
*/
function baseSortBy(array, comparer) {
var length = array.length;
array.sort(comparer);
while (length--) {
array[length] = array[length].value;
}
return array;
}
/**
* Used by `_.sortByOrder` to compare multiple properties of a value to another
* and stable sort them.
*
* If `orders` is unspecified, all valuess are sorted in ascending order. Otherwise,
* a value is sorted in ascending order if its corresponding order is "asc", and
* descending if "desc".
*
* @private
* @param {Object} object The object to compare.
* @param {Object} other The other object to compare.
* @param {boolean[]|string[]} orders The order to sort by for each property.
* @returns {number} Returns the sort order indicator for `object`.
*/
function compareMultiple(object, other, orders) {
var index = -1,
objCriteria = object.criteria,
othCriteria = other.criteria,
length = objCriteria.length,
ordersLength = orders.length;
while (++index < length) {
var result = compareAscending(objCriteria[index], othCriteria[index]);
if (result) {
if (index >= ordersLength) {
return result;
}
var order = orders[index];
return result * (order === 'asc' ? 1 : -1);
}
}
// Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
// that causes it, under certain circumstances, to provide the same value for
// `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
// for more details.
//
// This also ensures a stable sort in V8 and other engines.
// See https://code.google.com/p/v8/issues/detail?id=90 for more details.
return object.index - other.index;
}
/**
* The base implementation of `_.sortByOrder` without param guards.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
* @param {string[]} orders The sort orders of `iteratees`.
* @returns {Array} Returns the new sorted array.
*/
function baseSortByOrder(collection, iteratees, orders) {
var index = -1;
iteratees = arrayMap(iteratees.length ? iteratees : Array(1), function(iteratee) {
return baseIteratee(iteratee);
});
var result = baseMap(collection, function(value, key, collection) {
var criteria = arrayMap(iteratees, function(iteratee) {
return iteratee(value);
});
return { 'criteria': criteria, 'index': ++index, 'value': value };
});
return baseSortBy(result, function(object, other) {
return compareMultiple(object, other, orders);
});
}
/**
* Creates an array of elements, sorted in ascending order by the results of
* running each element in a collection through each iteratee. This method
* performs a stable sort, that is, it preserves the original sort order of
* equal elements. The iteratees are invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {...(Function|Function[]|Object|Object[]|string|string[])} [iteratees=[_.identity]]
* The iteratees to sort by, specified individually or in arrays.
* @returns {Array} Returns the new sorted array.
* @example
*
* var resolve = _.partial(_.map, _, _.values);
*
* var users = [
* { 'user': 'fred', 'age': 48 },
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 42 },
* { 'user': 'barney', 'age': 34 }
* ];
*
* resolve( _.sortBy(users, function(o) { return o.user; }) );
* // => // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
*
* resolve( _.sortBy(users, ['user', 'age']) );
* // => [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 48]]
*
* resolve( _.sortBy(users, 'user', function(o) {
* return Math.floor(o.age / 10);
* }) );
* // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
*/
var sortBy = rest(function(collection, iteratees) {
if (collection == null) {
return [];
}
var length = iteratees.length;
if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
iteratees = [];
} else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
iteratees.length = 1;
}
return baseSortByOrder(collection, baseFlatten(iteratees), []);
});
/**
* This method is like `_.sortBy` except that it allows specifying the
* sort orders of the iteratees to sort by. If `orders` is unspecified, all
* values are sorted in ascending order. Otherwise, a value is sorted in
* ascending order if its corresponding order is "asc", and descending if "desc".
*
* @static
* @memberOf _
* @category Collection
* @param {Array|Object} collection The collection to iterate over.
* @param {Function[]|Object[]|string[]} [iteratees=[_.identity]] The iteratees to sort by.
* @param {string[]} [orders] The sort orders of `iteratees`.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.reduce`.
* @returns {Array} Returns the new sorted array.
* @example
*
* var resolve = _.partial(_.map, _, _.values);
*
* var users = [
* { 'user': 'fred', 'age': 48 },
* { 'user': 'barney', 'age': 34 },
* { 'user': 'fred', 'age': 42 },
* { 'user': 'barney', 'age': 36 }
* ];
*
* // sort by `user` in ascending order and by `age` in descending order
* resolve( _.sortByOrder(users, ['user', 'age'], ['asc', 'desc']) );
* // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
*/
function sortByOrder(collection, iteratees, orders, guard) {
if (collection == null) {
return [];
}
if (!isArray(iteratees)) {
iteratees = iteratees == null ? [] : [iteratees];
}
orders = guard ? undefined : orders;
if (!isArray(orders)) {
orders = orders == null ? [] : [orders];
}
return baseSortByOrder(collection, iteratees, orders);
}
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH$5 = 4294967295;
var MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH$5 - 1;
var nativeFloor$3 = Math.floor;
var nativeMin$6 = Math.min;
/**
* This function is like `binaryIndex` except that it invokes `iteratee` for
* `value` and each element of `array` to compute their sort ranking. The
* iteratee is invoked with one argument; (value).
*
* @private
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function} iteratee The function invoked per element.
* @param {boolean} [retHighest] Specify returning the highest qualified index.
* @returns {number} Returns the index at which `value` should be inserted into `array`.
*/
function binaryIndexBy(array, value, iteratee, retHighest) {
value = iteratee(value);
var low = 0,
high = array ? array.length : 0,
valIsNaN = value !== value,
valIsNull = value === null,
valIsUndef = value === undefined;
while (low < high) {
var mid = nativeFloor$3((low + high) / 2),
computed = iteratee(array[mid]),
isDef = computed !== undefined,
isReflexive = computed === computed;
if (valIsNaN) {
var setLow = isReflexive || retHighest;
} else if (valIsNull) {
setLow = isReflexive && isDef && (retHighest || computed != null);
} else if (valIsUndef) {
setLow = isReflexive && (retHighest || isDef);
} else if (computed == null) {
setLow = false;
} else {
setLow = retHighest ? (computed <= value) : (computed < value);
}
if (setLow) {
low = mid + 1;
} else {
high = mid;
}
}
return nativeMin$6(high, MAX_ARRAY_INDEX);
}
var MAX_ARRAY_LENGTH$4 = 4294967295;
var HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH$4 >>> 1;
/**
* Performs a binary search of `array` to determine the index at which `value`
* should be inserted into `array` in order to maintain its sort order.
*
* @private
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {boolean} [retHighest] Specify returning the highest qualified index.
* @returns {number} Returns the index at which `value` should be inserted
* into `array`.
*/
function binaryIndex(array, value, retHighest) {
var low = 0,
high = array ? array.length : low;
if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
while (low < high) {
var mid = (low + high) >>> 1,
computed = array[mid];
if ((retHighest ? (computed <= value) : (computed < value)) && computed !== null) {
low = mid + 1;
} else {
high = mid;
}
}
return high;
}
return binaryIndexBy(array, value, identity, retHighest);
}
/**
* Uses a binary search to determine the lowest index at which `value` should
* be inserted into `array` in order to maintain its sort order.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @returns {number} Returns the index at which `value` should be inserted into `array`.
* @example
*
* _.sortedIndex([30, 50], 40);
* // => 1
*
* _.sortedIndex([4, 5], 4);
* // => 0
*/
function sortedIndex(array, value) {
return binaryIndex(array, value);
}
/**
* This method is like `_.sortedIndex` except that it accepts `iteratee`
* which is invoked for `value` and each element of `array` to compute their
* sort ranking. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {number} Returns the index at which `value` should be inserted into `array`.
* @example
*
* var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
*
* _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
* // => 1
*
* // using the `_.property` callback shorthand
* _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
* // => 0
*/
function sortedIndexBy(array, value, iteratee) {
return binaryIndexBy(array, value, baseIteratee(iteratee));
}
/**
* This method is like `_.indexOf` except that it performs a binary
* search on a sorted `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.sortedIndexOf([1, 1, 2, 2], 2);
* // => 2
*/
function sortedIndexOf(array, value) {
var length = array ? array.length : 0;
if (length) {
var index = binaryIndex(array, value);
if (index < length &&
(value === value ? (value === array[index]) : (array[index] !== array[index]))) {
return index;
}
}
return -1;
}
/**
* This method is like `_.sortedIndex` except that it returns the highest
* index at which `value` should be inserted into `array` in order to
* maintain its sort order.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @returns {number} Returns the index at which `value` should be inserted into `array`.
* @example
*
* _.sortedLastIndex([4, 5], 4);
* // => 1
*/
function sortedLastIndex(array, value) {
return binaryIndex(array, value, true);
}
/**
* This method is like `_.sortedLastIndex` except that it accepts `iteratee`
* which is invoked for `value` and each element of `array` to compute their
* sort ranking. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The sorted array to inspect.
* @param {*} value The value to evaluate.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {number} Returns the index at which `value` should be inserted into `array`.
* @example
*
* // using the `_.property` callback shorthand
* _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
* // => 1
*/
function sortedLastIndexBy(array, value, iteratee) {
return binaryIndexBy(array, value, baseIteratee(iteratee), true);
}
/**
* This method is like `_.lastIndexOf` except that it performs a binary
* search on a sorted `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.sortedLastIndexOf([1, 1, 2, 2], 2);
* // => 3
*/
function sortedLastIndexOf(array, value) {
var length = array ? array.length : 0;
if (length) {
var index = binaryIndex(array, value, true) - 1,
other = array[index];
if (value === value ? (value === other) : (other !== other)) {
return index;
}
}
return -1;
}
/**
* The base implementation of `_.sortedUniqBy` without support for callback
* shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new duplicate free array.
*/
function baseSortedUniqBy(array, iteratee) {
var index = 0,
length = array.length,
value = array[0],
computed = iteratee ? iteratee(value) : value,
seen = computed,
resIndex = 0,
result = [value];
while (++index < length) {
value = array[index],
computed = iteratee ? iteratee(value) : value;
if ((seen === seen ? (seen !== computed) : (computed === computed))) {
seen = computed;
result[++resIndex] = value;
}
}
return result;
}
/**
* The base implementation of `_.sortedUniq`.
*
* @private
* @param {Array} array The array to inspect.
* @returns {Array} Returns the new duplicate free array.
*/
function baseSortedUniq(array) {
return baseSortedUniqBy(array);
}
/**
* This method is like `_.uniq` except that it's designed and optimized
* for sorted arrays.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.sortedUniq([1, 1, 2]);
* // => [1, 2]
*/
function sortedUniq(array) {
return (array && array.length)
? baseSortedUniq(array)
: [];
}
/**
* This method is like `_.uniqBy` except that it's designed and optimized
* for sorted arrays.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
* // => [1.1, 2.2]
*/
function sortedUniqBy(array, iteratee) {
return (array && array.length)
? baseSortedUniqBy(array, baseIteratee(iteratee))
: [];
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$6 = 'Expected a function';
/**
* Creates a function that invokes `func` with the `this` binding of the created
* function and an array of arguments much like [`Function#apply`](https://es5.github.io/#x15.3.4.3).
*
* **Note:** This method is based on the [spread operator](https://mdn.io/spread_operator).
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to spread arguments over.
* @returns {Function} Returns the new function.
* @example
*
* var say = _.spread(function(who, what) {
* return who + ' says ' + what;
* });
*
* say(['fred', 'hello']);
* // => 'fred says hello'
*
* // with a Promise
* var numbers = Promise.all([
* Promise.resolve(40),
* Promise.resolve(36)
* ]);
*
* numbers.then(_.spread(function(x, y) {
* return x + y;
* }));
* // => a Promise of 76
*/
function spread(func) {
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$6);
}
return function(array) {
return func.apply(this, array);
};
}
/**
* Converts `string` to [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the start cased string.
* @example
*
* _.startCase('--foo-bar');
* // => 'Foo Bar'
*
* _.startCase('fooBar');
* // => 'Foo Bar'
*
* _.startCase('__foo_bar__');
* // => 'Foo Bar'
*/
var startCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + capitalize(word);
});
/**
* Checks if `string` starts with the given target string.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to search.
* @param {string} [target] The string to search for.
* @param {number} [position=0] The position to search from.
* @returns {boolean} Returns `true` if `string` starts with `target`, else `false`.
* @example
*
* _.startsWith('abc', 'a');
* // => true
*
* _.startsWith('abc', 'b');
* // => false
*
* _.startsWith('abc', 'b', 1);
* // => true
*/
function startsWith(string, target, position) {
string = toString(string);
position = clamp(toInteger(position), 0, string.length);
return string.lastIndexOf(target, position) == position;
}
/**
* The base implementation of `_.sum` without support for callback shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {number} Returns the sum.
*/
function baseSum(array, iteratee) {
var result,
index = -1,
length = array.length;
while (++index < length) {
var current = iteratee(array[index]);
if (current === current && current != null) {
result = result === undefined ? current : (result + current);
}
}
return result;
}
/**
* Gets the sum of the values in `array`.
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @returns {number} Returns the sum.
* @example
*
* _.sum([4, 6]);
* // => 10
*/
function sum(array) {
return (array && array.length)
? baseSum(array, identity)
: undefined;
}
/**
* This method is like `_.sum` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the value to be summed.
* The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Math
* @param {Array} array The array to iterate over.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {number} Returns the sum.
* @example
*
* var objects = [
* { 'n': 4 },
* { 'n': 6 }
* ];
*
* _.sum(objects, function(o) { return o.n; });
* // => 10
*
* // using the `_.property` callback shorthand
* _.sum(objects, 'n');
* // => 10
*/
function sumBy(array, iteratee) {
return (array && array.length)
? baseSum(array, baseIteratee(iteratee))
: undefined;
}
/**
* Gets all but the first element of `array`.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.tail([1, 2, 3]);
* // => [2, 3]
*/
function tail(array) {
return drop(array, 1);
}
/**
* Creates a slice of `array` with `n` elements taken from the beginning.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to take.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.take([1, 2, 3]);
* // => [1]
*
* _.take([1, 2, 3], 2);
* // => [1, 2]
*
* _.take([1, 2, 3], 5);
* // => [1, 2, 3]
*
* _.take([1, 2, 3], 0);
* // => []
*/
function take(array, n, guard) {
if (!(array && array.length)) {
return [];
}
n = (guard || n === undefined) ? 1 : n;
return baseSlice(array, 0, n < 0 ? 0 : n);
}
/**
* Creates a slice of `array` with `n` elements taken from the end.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {number} [n=1] The number of elements to take.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {Array} Returns the slice of `array`.
* @example
*
* _.takeRight([1, 2, 3]);
* // => [3]
*
* _.takeRight([1, 2, 3], 2);
* // => [2, 3]
*
* _.takeRight([1, 2, 3], 5);
* // => [1, 2, 3]
*
* _.takeRight([1, 2, 3], 0);
* // => []
*/
function takeRight(array, n, guard) {
var length = array ? array.length : 0;
if (!length) {
return [];
}
n = (guard || n === undefined) ? 1 : toInteger(n);
n = length - n;
return baseSlice(array, n < 0 ? 0 : n);
}
/**
* Creates a slice of `array` with elements taken from the end. Elements are
* taken until `predicate` returns falsey. The predicate is invoked with three
* arguments: (value, index, array).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'active': true },
* { 'user': 'fred', 'active': false },
* { 'user': 'pebbles', 'active': false }
* ];
*
* resolve( _.takeRightWhile(users, function(o) { return !o.active; }) );
* // => ['fred', 'pebbles']
*
* // using the `_.matches` callback shorthand
* resolve( _.takeRightWhile(users, { 'user': 'pebbles', 'active': false }) );
* // => ['pebbles']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.takeRightWhile(users, ['active', false]) );
* // => ['fred', 'pebbles']
*
* // using the `_.property` callback shorthand
* resolve( _.takeRightWhile(users, 'active') );
* // => []
*/
function takeRightWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, baseIteratee(predicate, 3), false, true)
: [];
}
/**
* Creates a slice of `array` with elements taken from the beginning. Elements
* are taken until `predicate` returns falsey. The predicate is invoked with
* three arguments: (value, index, array).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to query.
* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
* @returns {Array} Returns the slice of `array`.
* @example
*
* var resolve = _.partial(_.map, _, 'user');
*
* var users = [
* { 'user': 'barney', 'active': false },
* { 'user': 'fred', 'active': false},
* { 'user': 'pebbles', 'active': true }
* ];
*
* resolve( _.takeWhile(users, function(o) { return !o.active; }) );
* // => ['barney', 'fred']
*
* // using the `_.matches` callback shorthand
* resolve( _.takeWhile(users, { 'user': 'barney', 'active': false }) );
* // => ['barney']
*
* // using the `_.matchesProperty` callback shorthand
* resolve( _.takeWhile(users, ['active', false]) );
* // => ['barney', 'fred']
*
* // using the `_.property` callback shorthand
* resolve( _.takeWhile(users, 'active') );
* // => []
*/
function takeWhile(array, predicate) {
return (array && array.length)
? baseWhile(array, baseIteratee(predicate, 3))
: [];
}
/**
* This method invokes `interceptor` and returns `value`. The interceptor is
* invoked with one argument; (value). The purpose of this method is to "tap into"
* a method chain in order to perform operations on intermediate results within
* the chain.
*
* @static
* @memberOf _
* @category Chain
* @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke.
* @returns {*} Returns `value`.
* @example
*
* _([1, 2, 3])
* .tap(function(array) {
* array.pop();
* })
* .reverse()
* .value();
* // => [2, 1]
*/
function tap(value, interceptor) {
interceptor(value);
return value;
}
/** Used to escape characters for inclusion in compiled string literals. */
var stringEscapes = {
'\\': '\\',
"'": "'",
'\n': 'n',
'\r': 'r',
'\u2028': 'u2028',
'\u2029': 'u2029'
};
/**
* Used by `_.template` to escape characters for inclusion in compiled string literals.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
function escapeStringChar(chr) {
return '\\' + stringEscapes[chr];
}
/** Used to match template delimiters. */
var reInterpolate = /<%=([\s\S]+?)%>/g;
/** Used to match template delimiters. */
var reEvaluate = /<%([\s\S]+?)%>/g;
/** Used to match template delimiters. */
var reEscape = /<%-([\s\S]+?)%>/g;
/**
* By default, the template delimiters used by lodash are like those in
* embedded Ruby (ERB). Change the following template settings to use
* alternative delimiters.
*
* @static
* @memberOf _
* @type Object
*/
var templateSettings = {
/**
* Used to detect `data` property values to be HTML-escaped.
*
* @memberOf _.templateSettings
* @type RegExp
*/
'escape': reEscape,
/**
* Used to detect code to be evaluated.
*
* @memberOf _.templateSettings
* @type RegExp
*/
'evaluate': reEvaluate,
/**
* Used to detect `data` property values to inject.
*
* @memberOf _.templateSettings
* @type RegExp
*/
'interpolate': reInterpolate,
/**
* Used to reference the data object in the template text.
*
* @memberOf _.templateSettings
* @type string
*/
'variable': '',
/**
* Used to import variables into the compiled template.
*
* @memberOf _.templateSettings
* @type Object
*/
'imports': {
/**
* A reference to the `lodash` function.
*
* @memberOf _.templateSettings.imports
* @type Function
*/
'_': { 'escape': escape }
}
};
var reEmptyStringLeading = /\b__p \+= '';/g;
var reEmptyStringMiddle = /\b(__p \+=) '' \+/g;
var reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
/** Used to match [ES template delimiters](http://ecma-international.org/ecma-262/6.0/#sec-template-literal-lexical-components). */
var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
/** Used to ensure capturing order of template delimiters. */
var reNoMatch = /($^)/;
/** Used to match unescaped characters in compiled string literals. */
var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
/**
* Creates a compiled template function that can interpolate data properties
* in "interpolate" delimiters, HTML-escape interpolated data properties in
* "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
* properties may be accessed as free variables in the template. If a setting
* object is provided it takes precedence over `_.templateSettings` values.
*
* **Note:** In the development build `_.template` utilizes
* [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
* for easier debugging.
*
* For more information on precompiling templates see
* [lodash's custom builds documentation](https://lodash.com/custom-builds).
*
* For more information on Chrome extension sandboxes see
* [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The template string.
* @param {Object} [options] The options object.
* @param {RegExp} [options.escape] The HTML "escape" delimiter.
* @param {RegExp} [options.evaluate] The "evaluate" delimiter.
* @param {Object} [options.imports] An object to import into the template as free variables.
* @param {RegExp} [options.interpolate] The "interpolate" delimiter.
* @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
* @param {string} [options.variable] The data object variable name.
* @param- {Object} [otherOptions] Enables the legacy `options` param signature.
* @returns {Function} Returns the compiled template function.
* @example
*
* // using the "interpolate" delimiter to create a compiled template
* var compiled = _.template('hello <%= user %>!');
* compiled({ 'user': 'fred' });
* // => 'hello fred!'
*
* // using the HTML "escape" delimiter to escape data property values
* var compiled = _.template('<b><%- value %></b>');
* compiled({ 'value': '<script>' });
* // => '<b>&lt;script&gt;</b>'
*
* // using the "evaluate" delimiter to execute JavaScript and generate HTML
* var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
* compiled({ 'users': ['fred', 'barney'] });
* // => '<li>fred</li><li>barney</li>'
*
* // using the internal `print` function in "evaluate" delimiters
* var compiled = _.template('<% print("hello " + user); %>!');
* compiled({ 'user': 'barney' });
* // => 'hello barney!'
*
* // using the ES delimiter as an alternative to the default "interpolate" delimiter
* var compiled = _.template('hello ${ user }!');
* compiled({ 'user': 'pebbles' });
* // => 'hello pebbles!'
*
* // using custom template delimiters
* _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
* var compiled = _.template('hello {{ user }}!');
* compiled({ 'user': 'mustache' });
* // => 'hello mustache!'
*
* // using backslashes to treat delimiters as plain text
* var compiled = _.template('<%= "\\<%- value %\\>" %>');
* compiled({ 'value': 'ignored' });
* // => '<%- value %>'
*
* // using the `imports` option to import `jQuery` as `jq`
* var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
* var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
* compiled({ 'users': ['fred', 'barney'] });
* // => '<li>fred</li><li>barney</li>'
*
* // using the `sourceURL` option to specify a custom sourceURL for the template
* var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
* compiled(data);
* // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
*
* // using the `variable` option to ensure a with-statement isn't used in the compiled template
* var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
* compiled.source;
* // => function(data) {
* // var __t, __p = '';
* // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
* // return __p;
* // }
*
* // using the `source` property to inline compiled templates for meaningful
* // line numbers in error messages and a stack trace
* fs.writeFileSync(path.join(cwd, 'jst.js'), '\
* var JST = {\
* "main": ' + _.template(mainText).source + '\
* };\
* ');
*/
function template(string, options, otherOptions) {
// Based on John Resig's `tmpl` implementation (http://ejohn.org/blog/javascript-micro-templating/)
// and Laura Doktorova's doT.js (https://github.com/olado/doT).
var settings = templateSettings.imports._.templateSettings || templateSettings;
if (otherOptions && isIterateeCall(string, options, otherOptions)) {
options = otherOptions = undefined;
}
string = toString(string);
options = extendWith({}, otherOptions || options, settings, extendDefaults);
var imports = extendWith({}, options.imports, settings.imports, extendDefaults),
importsKeys = keys(imports),
importsValues = baseValues(imports, importsKeys);
var isEscaping,
isEvaluating,
index = 0,
interpolate = options.interpolate || reNoMatch,
source = "__p += '";
// Compile the regexp to match each delimiter.
var reDelimiters = RegExp(
(options.escape || reNoMatch).source + '|' +
interpolate.source + '|' +
(interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
(options.evaluate || reNoMatch).source + '|$'
, 'g');
// Use a sourceURL for easier debugging.
var sourceURL = 'sourceURL' in options ? '//# sourceURL=' + options.sourceURL + '\n' : '';
string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
interpolateValue || (interpolateValue = esTemplateValue);
// Escape characters that can't be included in string literals.
source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
// Replace delimiters with snippets.
if (escapeValue) {
isEscaping = true;
source += "' +\n__e(" + escapeValue + ") +\n'";
}
if (evaluateValue) {
isEvaluating = true;
source += "';\n" + evaluateValue + ";\n__p += '";
}
if (interpolateValue) {
source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
}
index = offset + match.length;
// The JS engine embedded in Adobe products needs `match` returned in
// order to produce the correct `offset` value.
return match;
});
source += "';\n";
// If `variable` is not specified wrap a with-statement around the generated
// code to add the data object to the top of the scope chain.
var variable = options.variable;
if (!variable) {
source = 'with (obj) {\n' + source + '\n}\n';
}
// Cleanup code by stripping empty strings.
source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
.replace(reEmptyStringMiddle, '$1')
.replace(reEmptyStringTrailing, '$1;');
// Frame code as the function body.
source = 'function(' + (variable || 'obj') + ') {\n' +
(variable
? ''
: 'obj || (obj = {});\n'
) +
"var __t, __p = ''" +
(isEscaping
? ', __e = _.escape'
: ''
) +
(isEvaluating
? ', __j = Array.prototype.join;\n' +
"function print() { __p += __j.call(arguments, '') }\n"
: ';\n'
) +
source +
'return __p\n}';
var result = attempt(function() {
return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined, importsValues);
});
// Provide the compiled function's source by its `toString` method or
// the `source` property as a convenience for inlining compiled templates.
result.source = source;
if (isError(result)) {
throw result;
}
return result;
}
/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$7 = 'Expected a function';
/**
* Creates a throttled function that only invokes `func` at most once per
* every `wait` milliseconds. The throttled function comes with a `cancel`
* method to cancel delayed invocations. Provide an options object to indicate
* that `func` should be invoked on the leading and/or trailing edge of the
* `wait` timeout. Subsequent calls to the throttled function return the
* result of the last `func` call.
*
* **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
* on the trailing edge of the timeout only if the the throttled function is
* invoked more than once during the `wait` timeout.
*
* See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
* for details over the differences between `_.throttle` and `_.debounce`.
*
* @static
* @memberOf _
* @category Function
* @param {Function} func The function to throttle.
* @param {number} [wait=0] The number of milliseconds to throttle invocations to.
* @param {Object} [options] The options object.
* @param {boolean} [options.leading=true] Specify invoking on the leading
* edge of the timeout.
* @param {boolean} [options.trailing=true] Specify invoking on the trailing
* edge of the timeout.
* @returns {Function} Returns the new throttled function.
* @example
*
* // avoid excessively updating the position while scrolling
* jQuery(window).on('scroll', _.throttle(updatePosition, 100));
*
* // invoke `renewToken` when the click event is fired, but not more than once every 5 minutes
* jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
* 'trailing': false
* }));
*
* // cancel a trailing throttled call
* jQuery(window).on('popstate', throttled.cancel);
*/
function throttle(func, wait, options) {
var leading = true,
trailing = true;
if (typeof func != 'function') {
throw new TypeError(FUNC_ERROR_TEXT$7);
}
if (isObject(options)) {
leading = 'leading' in options ? !!options.leading : leading;
trailing = 'trailing' in options ? !!options.trailing : trailing;
}
return debounce(func, wait, { 'leading': leading, 'maxWait': +wait, 'trailing': trailing });
}
/**
* This method is like `_.tap` except that it returns the result of `interceptor`.
*
* @static
* @memberOf _
* @category Chain
* @param {*} value The value to provide to `interceptor`.
* @param {Function} interceptor The function to invoke.
* @returns {*} Returns the result of `interceptor`.
* @example
*
* _(' abc ')
* .chain()
* .trim()
* .thru(function(value) {
* return [value];
* })
* .value();
* // => ['abc']
*/
function thru(value, interceptor) {
return interceptor(value);
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$2 = 9007199254740991;
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH$1 = 4294967295;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$3 = Math.min;
/**
* Invokes the iteratee function `n` times, returning an array of the results
* of each invocation. The iteratee is invoked with one argument; (index).
*
* @static
* @memberOf _
* @category Utility
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @returns {Array} Returns the array of results.
* @example
*
* var diceRolls = _.times(3, _.partial(_.random, 1, 6, false));
* // => [3, 6, 4]
*
* _.times(3, function(n) {
* mage.castSpell(n);
* });
* // => invokes `mage.castSpell` three times with `n` of `0`, `1`, and `2`
*/
function times(n, iteratee) {
n = toInteger(n);
if (n < 1 || n > MAX_SAFE_INTEGER$2) {
return [];
}
var index = MAX_ARRAY_LENGTH$1,
length = nativeMin$3(n, MAX_ARRAY_LENGTH$1);
iteratee = toFunction(iteratee);
n -= MAX_ARRAY_LENGTH$1;
var result = baseTimes(length, iteratee);
while (++index < n) {
iteratee(index);
}
return result;
}
/**
* Enables the wrapper to be iterable.
*
* @name Symbol.iterator
* @memberOf _
* @category Chain
* @returns {Object} Returns the wrapper object.
* @example
*
* var wrapped = _([1, 2]);
*
* wrapped[Symbol.iterator]() === wrapped;
* // => true
*
* Array.from(wrapped);
* // => [1, 2]
*/
function wrapperToIterator() {
return this;
}
/**
* Converts `string`, as a whole, to lower case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the lower cased string.
* @example
*
* _.toLower('--Foo-Bar');
* // => '--foo-bar'
*
* _.toLower('fooBar');
* // => 'foobar'
*
* _.toLower('__FOO_BAR__');
* // => '__foo_bar__'
*/
function toLower(value) {
return toString(value).toLowerCase();
}
/**
* Converts `value` to a property path array.
*
* @static
* @memberOf _
* @category Utility
* @param {*} value The value to convert.
* @returns {Array} Returns the new property path array.
* @example
*
* _.toPath('a.b.c');
* // => ['a', 'b', 'c']
*
* _.toPath('a[0].b.c');
* // => ['a', '0', 'b', 'c']
*
* var path = ['a', 'b', 'c'],
* newPath = _.toPath(path);
*
* console.log(newPath);
* // => ['a', 'b', 'c']
*
* console.log(path === newPath);
* // => false
*/
function toPath(value) {
return isArray(value) ? arrayMap(value, String) : stringToPath(value);
}
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$3 = 9007199254740991;
/**
* Converts `value` to a safe integer. A safe integer can be compared and
* represented correctly.
*
* @static
* @memberOf _
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted integer.
* @example
*
* _.toSafeInteger('3.14');
* // => 3
*
* _.toSafeInteger(NaN);
* // => 0
*
* _.toSafeInteger(Infinity)
* // => 9007199254740991
*
* _.toSafeInteger(-Infinity)
* // => -9007199254740991
*/
function toSafeInteger(value) {
return clamp(toInteger(value), -MAX_SAFE_INTEGER$3, MAX_SAFE_INTEGER$3);
}
/**
* Converts `string`, as a whole, to upper case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the upper cased string.
* @example
*
* _.toUpper('--foo-bar');
* // => '--FOO-BAR'
*
* _.toUpper('fooBar');
* // => 'FOOBAR'
*
* _.toUpper('__foo_bar__');
* // => '__FOO_BAR__'
*/
function toUpper(value) {
return toString(value).toUpperCase();
}
/**
* An alternative to `_.reduce`; this method transforms `object` to a new
* `accumulator` object which is the result of running each of its own enumerable
* properties through `iteratee`, with each invocation potentially mutating
* the `accumulator` object. The iteratee is invoked with four arguments:
* (accumulator, value, key, object). Iteratee functions may exit iteration
* early by explicitly returning `false`.
*
* @static
* @memberOf _
* @category Object
* @param {Array|Object} object The object to iterate over.
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
* @param {*} [accumulator] The custom accumulator value.
* @returns {*} Returns the accumulated value.
* @example
*
* _.transform([2, 3, 4], function(result, n) {
* result.push(n *= n);
* return n % 2 == 0;
* });
* // => [4, 9]
*
* _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
* (result[value] || (result[value] = [])).push(key);
* });
* // => { '1': ['a', 'c'], '2': ['b'] }
*/
function transform(object, iteratee, accumulator) {
var isArr = isArray(object) || isTypedArray(object);
iteratee = baseIteratee(iteratee, 4);
if (accumulator == null) {
if (isArr || isObject(object)) {
var Ctor = object.constructor;
if (isArr) {
accumulator = isArray(object) ? new Ctor : [];
} else {
accumulator = baseCreate(isFunction(Ctor) ? Ctor.prototype : undefined);
}
} else {
accumulator = {};
}
}
(isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
return iteratee(accumulator, value, index, object);
});
return accumulator;
}
/**
* Removes leading whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trimLeft(' abc ');
* // => 'abc '
*
* _.trimLeft('-_-abc-_-', '_-');
* // => 'abc-_-'
*/
function trimLeft(string, chars, guard) {
string = toString(string);
if (!string) {
return string;
}
if (guard || chars === undefined) {
return string.slice(trimmedLeftIndex(string));
}
chars = (chars + '');
if (!chars) {
return string;
}
var strSymbols = stringToArray(string);
return strSymbols.slice(charsLeftIndex(strSymbols, stringToArray(chars))).join('');
}
/**
* Removes trailing whitespace or specified characters from `string`.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to trim.
* @param {string} [chars=whitespace] The characters to trim.
* @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
* @returns {string} Returns the trimmed string.
* @example
*
* _.trimRight(' abc ');
* // => ' abc'
*
* _.trimRight('-_-abc-_-', '_-');
* // => '-_-abc'
*/
function trimRight(string, chars, guard) {
string = toString(string);
if (!string) {
return string;
}
if (guard || chars === undefined) {
return string.slice(0, trimmedRightIndex(string) + 1);
}
chars = (chars + '');
if (!chars) {
return string;
}
var strSymbols = stringToArray(string);
return strSymbols.slice(0, charsRightIndex(strSymbols, stringToArray(chars)) + 1).join('');
}
var DEFAULT_TRUNC_LENGTH = 30;
var DEFAULT_TRUNC_OMISSION = '...';
/** Used to match `RegExp` flags from their coerced string values. */
var reFlags = /\w*$/;
/** Used to compose unicode character classes. */
var rsAstralRange = '\\ud800-\\udfff';
var rsComboRange$1 = '\\u0300-\\u036f\\ufe20-\\ufe23';
var rsVarRange = '\\ufe0e\\ufe0f';
/** Used to compose unicode capture groups. */
var rsZWJ = '\\u200d';
/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange$1 + rsVarRange + ']');
/**
* Truncates `string` if it's longer than the given maximum string length.
* The last characters of the truncated string are replaced with the omission
* string which defaults to "...".
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to truncate.
* @param {Object} [options] The options object.
* @param {number} [options.length=30] The maximum string length.
* @param {string} [options.omission='...'] The string to indicate text is omitted.
* @param {RegExp|string} [options.separator] The separator pattern to truncate to.
* @returns {string} Returns the truncated string.
* @example
*
* _.trunc('hi-diddly-ho there, neighborino');
* // => 'hi-diddly-ho there, neighbo...'
*
* _.trunc('hi-diddly-ho there, neighborino', {
* 'length': 24,
* 'separator': ' '
* });
* // => 'hi-diddly-ho there,...'
*
* _.trunc('hi-diddly-ho there, neighborino', {
* 'length': 24,
* 'separator': /,? +/
* });
* // => 'hi-diddly-ho there...'
*
* _.trunc('hi-diddly-ho there, neighborino', {
* 'omission': ' [...]'
* });
* // => 'hi-diddly-ho there, neig [...]'
*/
function trunc(string, options) {
var length = DEFAULT_TRUNC_LENGTH,
omission = DEFAULT_TRUNC_OMISSION;
if (isObject(options)) {
var separator = 'separator' in options ? options.separator : separator;
length = 'length' in options ? toInteger(options.length) : length;
omission = 'omission' in options ? toString(options.omission) : omission;
}
string = toString(string);
var strLength = string.length;
if (reHasComplexSymbol.test(string)) {
var strSymbols = stringToArray(string);
strLength = strSymbols.length;
}
if (length >= strLength) {
return string;
}
var end = length - stringSize(omission);
if (end < 1) {
return omission;
}
var result = strSymbols
? strSymbols.slice(0, end).join('')
: string.slice(0, end);
if (separator === undefined) {
return result + omission;
}
if (strSymbols) {
end += (result.length - end);
}
if (isRegExp(separator)) {
if (string.slice(end).search(separator)) {
var match,
substring = result;
if (!separator.global) {
separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
}
separator.lastIndex = 0;
while ((match = separator.exec(substring))) {
var newEnd = match.index;
}
result = result.slice(0, newEnd === undefined ? end : newEnd);
}
} else if (string.indexOf(separator, end) != end) {
var index = result.lastIndexOf(separator);
if (index > -1) {
result = result.slice(0, index);
}
}
return result + omission;
}
/** Used to map HTML entities to characters. */
var htmlUnescapes = {
'&amp;': '&',
'&lt;': '<',
'&gt;': '>',
'&quot;': '"',
'&#39;': "'",
'&#96;': '`'
};
/**
* Used by `_.unescape` to convert HTML entities to characters.
*
* @private
* @param {string} chr The matched character to unescape.
* @returns {string} Returns the unescaped character.
*/
function unescapeHtmlChar(chr) {
return htmlUnescapes[chr];
}
var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g;
var reHasEscapedHtml = RegExp(reEscapedHtml.source);
/**
* The inverse of `_.escape`; this method converts the HTML entities
* `&amp;`, `&lt;`, `&gt;`, `&quot;`, `&#39;`, and `&#96;` in `string` to their
* corresponding characters.
*
* **Note:** No other HTML entities are unescaped. To unescape additional HTML
* entities use a third-party library like [_he_](https://mths.be/he).
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to unescape.
* @returns {string} Returns the unescaped string.
* @example
*
* _.unescape('fred, barney, &amp; pebbles');
* // => 'fred, barney, & pebbles'
*/
function unescape(string) {
string = toString(string);
return (string && reHasEscapedHtml.test(string))
? string.replace(reEscapedHtml, unescapeHtmlChar)
: string;
}
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE$2 = 200;
/**
* The base implementation of `_.uniqBy` without support for callback shorthands.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new duplicate free array.
*/
function baseUniqBy(array, iteratee) {
var index = -1,
indexOf = baseIndexOf,
length = array.length,
isCommon = true,
seen = length >= LARGE_ARRAY_SIZE$2 ? new SetCache : null,
result = [];
if (seen) {
indexOf = cacheIndexOf;
isCommon = false;
} else {
seen = iteratee ? [] : result;
}
outer:
while (++index < length) {
var value = array[index],
computed = iteratee ? iteratee(value) : value;
if (isCommon && computed === computed) {
var seenIndex = seen.length;
while (seenIndex--) {
if (seen[seenIndex] === computed) {
continue outer;
}
}
if (iteratee) {
seen.push(computed);
}
result.push(value);
}
else if (indexOf(seen, computed, 0) < 0) {
if (seen !== result) {
seen.push(computed);
}
result.push(value);
}
}
return result;
}
/**
* The base implementation of `_.uniq`.
*
* @private
* @param {Array} array The array to inspect.
* @param {Function} [iteratee] The function invoked per iteration.
* @returns {Array} Returns the new duplicate free array.
*/
function baseUniq(array) {
return baseUniqBy(array);
}
/**
* Creates an array of unique values, in order, from all of the provided arrays
* using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of combined values.
* @example
*
* _.union([2, 1], [4, 2], [1, 2]);
* // => [2, 1, 4]
*/
var union = rest(function(arrays) {
return baseUniq(baseFlatten(arrays, false, true));
});
/**
* This method is like `_.union` except that it accepts `iteratee` which is
* invoked for each element of each `arrays` to generate the criterion by which
* uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns the new array of combined values.
* @example
*
* _.unionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
* // => [2.1, 1.2, 4.3]
*
* // using the `_.property` callback shorthand
* _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }, { 'x': 2 }]
*/
var unionBy = rest(function(arrays) {
var iteratee = last(arrays);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return baseUniqBy(baseFlatten(arrays, false, true), baseIteratee(iteratee));
});
/**
* Creates a duplicate-free version of an array, using
* [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons, in which only the first occurrence of each element
* is kept.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniq([2, 1, 2]);
* // => [2, 1]
*/
function uniq(array) {
return (array && array.length)
? baseUniq(array)
: [];
}
/**
* This method is like `_.uniq` except that it accepts `iteratee` which is
* invoked for each element in `array` to generate the criterion by which
* uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to inspect.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns the new duplicate free array.
* @example
*
* _.uniqBy([2.1, 1.2, 2.3], Math.floor);
* // => [2.1, 1.2]
*
* // using the `_.property` callback shorthand
* _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 1 }, { 'x': 2 }]
*/
function uniqBy(array, iteratee) {
return (array && array.length)
? baseUniqBy(array, baseIteratee(iteratee))
: [];
}
/** Used to generate unique IDs. */
var idCounter = 0;
/**
* Generates a unique ID. If `prefix` is provided the ID is appended to it.
*
* @static
* @memberOf _
* @category Utility
* @param {string} [prefix] The value to prefix the ID with.
* @returns {string} Returns the unique ID.
* @example
*
* _.uniqueId('contact_');
* // => 'contact_104'
*
* _.uniqueId();
* // => '105'
*/
function uniqueId(prefix) {
var id = ++idCounter;
return toString(prefix) + id;
}
/**
* The base implementation of `_.unset`.
*
* @private
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to unset.
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
*/
function baseUnset(object, path) {
path = isKey(path, object) ? [path + ''] : baseToPath(path);
object = parent$1(object, path);
var key = last(path);
return (object != null && has(object, key)) ? delete object[key] : true;
}
/**
* Removes the property at `path` of `object`.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to modify.
* @param {Array|string} path The path of the property to unset.
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
* @example
*
* var object = { 'a': [{ 'b': { 'c': 7 } }] };
* _.unset(object, 'a[0].b.c');
* // => true
*
* console.log(object);
* // => { 'a': [{ 'b': {} }] };
*
* _.unset(object, 'a[0].b.c');
* // => true
*
* console.log(object);
* // => { 'a': [{ 'b': {} }] };
*/
function unset(object, path) {
return object == null ? true : baseUnset(object, path);
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$8 = Math.max;
/**
* This method is like `_.zip` except that it accepts an array of grouped
* elements and creates an array regrouping the elements to their pre-zip
* configuration.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array of grouped elements to process.
* @returns {Array} Returns the new array of regrouped elements.
* @example
*
* var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]);
* // => [['fred', 30, true], ['barney', 40, false]]
*
* _.unzip(zipped);
* // => [['fred', 'barney'], [30, 40], [true, false]]
*/
function unzip(array) {
if (!(array && array.length)) {
return [];
}
var length = 0;
array = arrayFilter(array, function(group) {
if (isArrayLikeObject(group)) {
length = nativeMax$8(group.length, length);
return true;
}
});
return baseTimes(length, function(index) {
return arrayMap(array, baseProperty(index));
});
}
/**
* This method is like `_.unzip` except that it accepts `iteratee` to specify
* how regrouped values should be combined. The iteratee is invoked with four
* arguments: (accumulator, value, index, group). The first element of each
* group is used as the initial `accumulator` value.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array of grouped elements to process.
* @param {Function} [iteratee=_.identity] The function to combine regrouped values.
* @returns {Array} Returns the new array of regrouped elements.
* @example
*
* var zipped = _.zip([1, 2], [10, 20], [100, 200]);
* // => [[1, 10, 100], [2, 20, 200]]
*
* _.unzipWith(zipped, _.add);
* // => [3, 30, 300]
*/
function unzipWith(array, iteratee) {
if (!(array && array.length)) {
return [];
}
var result = unzip(array);
if (iteratee == null) {
return result;
}
return arrayMap(result, function(group) {
return arrayReduce(group, iteratee, undefined, true);
});
}
/**
* Converts `string`, as space separated words, to upper case.
*
* @static
* @memberOf _
* @category String
* @param {string} [string=''] The string to convert.
* @returns {string} Returns the upper cased string.
* @example
*
* _.upperCase('--foo-bar');
* // => 'FOO BAR'
*
* _.upperCase('fooBar');
* // => 'FOO BAR'
*
* _.upperCase('__foo_bar__');
* // => 'FOO BAR'
*/
var upperCase = createCompounder(function(result, word, index) {
return result + (index ? ' ' : '') + word.toUpperCase();
});
/**
* The base implementation of `wrapperValue` which returns the result of
* performing a sequence of actions on the unwrapped `value`, where each
* successive action is supplied the return value of the previous.
*
* @private
* @param {*} value The unwrapped value.
* @param {Array} actions Actions to peform to resolve the unwrapped value.
* @returns {*} Returns the resolved value.
*/
function baseWrapperValue(value, actions) {
var result = value;
if (result instanceof LazyWrapper) {
result = result.value();
}
return arrayReduce(actions, function(result, action) {
return action.func.apply(action.thisArg, arrayPush([result], action.args));
}, result);
}
/**
* Executes the chained sequence to extract the unwrapped value.
*
* @name value
* @memberOf _
* @alias run, toJSON, valueOf
* @category Chain
* @returns {*} Returns the resolved unwrapped value.
* @example
*
* _([1, 2, 3]).value();
* // => [1, 2, 3]
*/
function wrapperValue() {
return baseWrapperValue(this.__wrapped__, this.__actions__);
}
/**
* Creates an array of the own and inherited enumerable property values
* of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property values.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.valuesIn(new Foo);
* // => [1, 2, 3] (iteration order is not guaranteed)
*/
function valuesIn(object) {
return object == null ? baseValues(object, keysIn(object)) : [];
}
/**
* Creates an array excluding all provided values using
* [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
* for equality comparisons.
*
* @static
* @memberOf _
* @category Array
* @param {Array} array The array to filter.
* @param {...*} [values] The values to exclude.
* @returns {Array} Returns the new array of filtered values.
* @example
*
* _.without([1, 2, 1, 3], 1, 2);
* // => [3]
*/
var without = rest(function(array, values) {
return isArrayLikeObject(array)
? baseDifference(array, values)
: [];
});
/**
* Creates a function that provides `value` to the wrapper function as its
* first argument. Any additional arguments provided to the function are
* appended to those provided to the wrapper function. The wrapper is invoked
* with the `this` binding of the created function.
*
* @static
* @memberOf _
* @category Function
* @param {*} value The value to wrap.
* @param {Function} wrapper The wrapper function.
* @returns {Function} Returns the new function.
* @example
*
* var p = _.wrap(_.escape, function(func, text) {
* return '<p>' + func(text) + '</p>';
* });
*
* p('fred, barney, & pebbles');
* // => '<p>fred, barney, &amp; pebbles</p>'
*/
function wrap(value, wrapper) {
wrapper = wrapper == null ? identity : wrapper;
return partial(wrapper, value);
}
/**
* Enables explicit method chaining on the wrapper object.
*
* @name chain
* @memberOf _
* @category Chain
* @returns {Object} Returns the new `lodash` wrapper instance.
* @example
*
* var users = [
* { 'user': 'barney', 'age': 36 },
* { 'user': 'fred', 'age': 40 }
* ];
*
* // without explicit chaining
* _(users).head();
* // => { 'user': 'barney', 'age': 36 }
*
* // with explicit chaining
* _(users)
* .chain()
* .head()
* .pick('user')
* .value();
* // => { 'user': 'barney' }
*/
function wrapperChain() {
return chain(this);
}
/**
* The base implementation of `_.xorBy` without support for callback shorthands.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @param {Function} [iteratee] The function invoked per element.
* @returns {Array} Returns the new array of values.
*/
function baseXorBy(arrays, iteratee) {
var index = -1,
length = arrays.length;
while (++index < length) {
var result = result
? arrayPush(baseDifferenceBy(result, arrays[index], iteratee), baseDifferenceBy(arrays[index], result, iteratee))
: arrays[index];
}
return (result && result.length) ? baseUniqBy(result, iteratee) : [];
}
/**
* The base implementation of `_.xor` that accepts an array of arrays to inspect.
*
* @private
* @param {Array} arrays The arrays to inspect.
* @returns {Array} Returns the new array of values.
*/
function baseXor(arrays) {
return baseXorBy(arrays);
}
/**
* Creates an array of unique values that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
* of the provided arrays.
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @returns {Array} Returns the new array of values.
* @example
*
* _.xor([2, 1], [4, 2]);
* // => [1, 4]
*/
var xor = rest(function(arrays) {
return baseXor(arrayFilter(arrays, isArrayLikeObject));
});
/**
* This method is like `_.xor` except that it accepts `iteratee` which is
* invoked for each element of each `arrays` to generate the criterion by which
* uniqueness is computed. The iteratee is invoked with one argument: (value).
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to inspect.
* @param {Function|Object|string} [iteratee=_.identity] The function invoked per element.
* @returns {Array} Returns the new array of values.
* @example
*
* _.xorBy([2.1, 1.2], [4.3, 2.4], Math.floor);
* // => [1.2, 4.3]
*
* // using the `_.property` callback shorthand
* _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
* // => [{ 'x': 2 }]
*/
var xorBy = rest(function(arrays) {
var iteratee = last(arrays);
if (isArrayLikeObject(iteratee)) {
iteratee = undefined;
}
return baseXorBy(arrayFilter(arrays, isArrayLikeObject), baseIteratee(iteratee));
});
/**
* Creates an array of grouped elements, the first of which contains the first
* elements of the given arrays, the second of which contains the second elements
* of the given arrays, and so on.
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to process.
* @returns {Array} Returns the new array of grouped elements.
* @example
*
* _.zip(['fred', 'barney'], [30, 40], [true, false]);
* // => [['fred', 30, true], ['barney', 40, false]]
*/
var zip = rest(unzip);
/**
* This method is like `_.zip` except that it accepts `iteratee` to specify
* how grouped values should be combined. The iteratee is invoked with four
* arguments: (accumulator, value, index, group). The first element of each
* group is used as the initial `accumulator` value.
*
* @static
* @memberOf _
* @category Array
* @param {...Array} [arrays] The arrays to process.
* @param {Function} [iteratee=_.identity] The function to combine grouped values.
* @returns {Array} Returns the new array of grouped elements.
* @example
*
* _.zipWith([1, 2], [10, 20], [100, 200], _.add);
* // => [111, 222]
*/
var zipWith = rest(function(arrays) {
var length = arrays.length,
iteratee = length > 1 ? arrays[length - 1] : undefined;
iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
return unzipWith(arrays, iteratee);
});
var func$1 = {
after, ary, before, bind, bindAll,
bindKey, curry, curryRight, debounce, defer,
delay, flip, memoize, modArgs, modArgsSet,
negate, once, partial, partialRight, rearg,
rest, spread, throttle, wrap
};
var object$1 = {
assign, assignWith, create, defaults, defaultsDeep,
extend, extendWith, findKey, findLastKey, forIn,
forInRight, forOwn, forOwnRight, functions, get,
has, hasIn, invert, keys, keysIn,
mapKeys, mapValues, merge, mergeWith, omit,
omitBy, pairs, pick, pickBy, result: result$1,
set, setWith, transform, unset, values,
valuesIn
};
var collection = {
at, countBy, each: forEach, eachRight: forEachRight, every,
filter, find, findLast, forEach, forEachRight,
groupBy, includes, invoke, keyBy, map,
partition, reduce, reduceRight, reject, sample,
sampleSize, shuffle, size: size$1, some, sortBy,
sortByOrder
};
/**
* Reverses the wrapped array so that the first element becomes the last,
* the second element becomes the second to last, and so on.
*
* **Note:** This method mutates the wrapped array.
*
* @name reverse
* @memberOf _
* @category Chain
* @returns {Object} Returns the new reversed `lodash` wrapper instance.
* @example
*
* var array = [1, 2, 3];
*
* _(array).reverse().value()
* // => [3, 2, 1]
*
* console.log(array);
* // => [3, 2, 1]
*/
function wrapperReverse() {
var value = this.__wrapped__;
if (value instanceof LazyWrapper) {
var wrapped = value;
if (this.__actions__.length) {
wrapped = new LazyWrapper(this);
}
wrapped = wrapped.reverse();
wrapped.__actions__.push({ 'func': thru, 'args': [reverse], 'thisArg': undefined });
return new LodashWrapper(wrapped, this.__chain__);
}
return this.thru(reverse);
}
var chain$1 = {
chain, commit: wrapperCommit, concat: wrapperConcat, lodash, next: wrapperNext,
plant: wrapperPlant, reverse: wrapperReverse, run: wrapperValue, tap, thru,
toIterator: wrapperToIterator, toJSON: wrapperValue, value: wrapperValue, valueOf: wrapperValue, wrapperChain
};
var array$1 = {
chunk, compact, difference, differenceBy, drop,
dropRight, dropRightWhile, dropWhile, fill, findIndex,
findLastIndex, flatten, flattenDeep, head, indexOf: indexOf$1,
initial, intersection, intersectionBy, last, lastIndexOf,
pull, pullAll, pullAllBy, pullAt, remove,
reverse, slice, sortedIndex, sortedIndexBy, sortedIndexOf,
sortedLastIndex, sortedLastIndexBy, sortedLastIndexOf, sortedUniq, sortedUniqBy,
tail, take, takeRight, takeRightWhile, takeWhile,
union, unionBy, uniq, uniqBy, unzip,
unzipWith, without, xor, xorBy, zip,
zipObject, zipWith
};
var utility = {
attempt, conforms, conj, constant, disj,
flow, flowRight, identity, iteratee: iteratee$1, juxt,
matches, matchesProperty, method, methodOf, mixin,
noop, nthArg, property, propertyOf, range,
times, toPath, uniqueId
};
var lang = {
clone, cloneDeep, cloneDeepWith, cloneWith, eq,
gt, gte, isArguments, isArray, isArrayLike,
isArrayLikeObject, isBoolean, isDate, isElement, isEmpty,
isEqual, isEqualWith, isError, isFinite, isFunction,
isInteger, isMatch, isMatchWith, isNaN, isNative,
isNil: isNil$1, isNull, isNumber, isObject, isObjectLike,
isPlainObject, isRegExp, isSafeInteger, isString, isTypedArray,
isUndefined, lt, lte, toArray, toInteger,
toPlainObject, toSafeInteger, toString
};
var string = {
camelCase, capitalize, deburr, endsWith, escape,
escapeRegExp, kebabCase, lowerCase, lowerFirst, pad,
padLeft, padRight, parseInt, repeat, snakeCase,
startCase, startsWith, template, templateSettings, toLower,
toUpper, trim, trimLeft, trimRight, trunc,
unescape, upperCase, upperFirst, words
};
var math = {
add, ceil, floor, max, maxBy,
min, minBy, round, sum, sumBy
};
var number = {
clamp, inRange, random
};
var date = {
now
};
/**
* Creates a clone of the lazy wrapper object.
*
* @private
* @name clone
* @memberOf LazyWrapper
* @returns {Object} Returns the cloned `LazyWrapper` object.
*/
function lazyClone() {
var result = new LazyWrapper(this.__wrapped__);
result.__actions__ = copyArray(this.__actions__);
result.__dir__ = this.__dir__;
result.__filtered__ = this.__filtered__;
result.__iteratees__ = copyArray(this.__iteratees__);
result.__takeCount__ = this.__takeCount__;
result.__views__ = copyArray(this.__views__);
return result;
}
/**
* Reverses the direction of lazy iteration.
*
* @private
* @name reverse
* @memberOf LazyWrapper
* @returns {Object} Returns the new reversed `LazyWrapper` object.
*/
function lazyReverse() {
if (this.__filtered__) {
var result = new LazyWrapper(this);
result.__dir__ = -1;
result.__filtered__ = true;
} else {
result = this.clone();
result.__dir__ *= -1;
}
return result;
}
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$14 = Math.max;
var nativeMin$10 = Math.min;
/**
* Gets the view, applying any `transforms` to the `start` and `end` positions.
*
* @private
* @param {number} start The start of the view.
* @param {number} end The end of the view.
* @param {Array} transforms The transformations to apply to the view.
* @returns {Object} Returns an object containing the `start` and `end`
* positions of the view.
*/
function getView(start, end, transforms) {
var index = -1,
length = transforms.length;
while (++index < length) {
var data = transforms[index],
size = data.size;
switch (data.type) {
case 'drop': start += size; break;
case 'dropRight': end -= size; break;
case 'take': end = nativeMin$10(end, start + size); break;
case 'takeRight': start = nativeMax$14(start, end - size); break;
}
}
return { 'start': start, 'end': end };
}
/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE$3 = 200;
/** Used to indicate the type of lazy iteratees. */
var LAZY_FILTER_FLAG = 1;
var LAZY_MAP_FLAG$1 = 2;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$7 = Math.min;
/**
* Extracts the unwrapped value from its lazy wrapper.
*
* @private
* @name value
* @memberOf LazyWrapper
* @returns {*} Returns the unwrapped value.
*/
function lazyValue() {
var array = this.__wrapped__.value(),
dir = this.__dir__,
isArr = isArray(array),
isRight = dir < 0,
arrLength = isArr ? array.length : 0,
view = getView(0, arrLength, this.__views__),
start = view.start,
end = view.end,
length = end - start,
index = isRight ? end : (start - 1),
iteratees = this.__iteratees__,
iterLength = iteratees.length,
resIndex = 0,
takeCount = nativeMin$7(length, this.__takeCount__);
if (!isArr || arrLength < LARGE_ARRAY_SIZE$3 || (arrLength == length && takeCount == length)) {
return baseWrapperValue(array, this.__actions__);
}
var result = [];
outer:
while (length-- && resIndex < takeCount) {
index += dir;
var iterIndex = -1,
value = array[index];
while (++iterIndex < iterLength) {
var data = iteratees[iterIndex],
iteratee = data.iteratee,
type = data.type,
computed = iteratee(value);
if (type == LAZY_MAP_FLAG$1) {
value = computed;
} else if (!computed) {
if (type == LAZY_FILTER_FLAG) {
continue outer;
} else {
break outer;
}
}
}
result[resIndex++] = value;
}
return result;
}
/** Used as the semantic version number. */
var VERSION = '4.0.0-pre';
/** Used to compose bitmasks for wrapper metadata. */
var BIND_KEY_FLAG$1 = 2;
/** Used to indicate the type of lazy iteratees. */
var LAZY_MAP_FLAG = 2;
/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH$2 = 4294967295;
/** Used for built-in method references. */
var arrayProto$1 = Array.prototype;
var objectProto$16 = Object.prototype;
var stringProto = String.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$7 = objectProto$16.hasOwnProperty;
/** Built-in value references. */
var Symbol$1 = root.Symbol;
var iteratorSymbol$1 = typeof (iteratorSymbol$1 = Symbol$1 && Symbol$1.iterator) == 'symbol' ? iteratorSymbol$1 : undefined;
var nativeMax$9 = Math.max;
var nativeMin$4 = Math.min;
// wrap `_.mixin` so it works when provided only one argument
var mixin$1 = (function(func) {
return function(object, source, options) {
if (options == null) {
var isObj = isObject(source),
props = isObj && keys(source),
methodNames = props && props.length && baseFunctions(source, props);
if (!(methodNames ? methodNames.length : isObj)) {
options = source;
source = object;
object = this;
}
}
return func(object, source, options);
};
}(mixin));
// Add functions that return wrapped values when chaining.
lodash.after = func$1.after;
lodash.ary = func$1.ary;
lodash.assign = object$1.assign;
lodash.assignWith = object$1.assignWith;
lodash.at = collection.at;
lodash.before = func$1.before;
lodash.bind = func$1.bind;
lodash.bindAll = func$1.bindAll;
lodash.bindKey = func$1.bindKey;
lodash.chain = chain$1.chain;
lodash.chunk = array$1.chunk;
lodash.compact = array$1.compact;
lodash.conforms = utility.conforms;
lodash.conj = utility.conj;
lodash.constant = utility.constant;
lodash.countBy = collection.countBy;
lodash.create = object$1.create;
lodash.curry = func$1.curry;
lodash.curryRight = func$1.curryRight;
lodash.debounce = func$1.debounce;
lodash.defaults = object$1.defaults;
lodash.defaultsDeep = object$1.defaultsDeep;
lodash.defer = func$1.defer;
lodash.delay = func$1.delay;
lodash.difference = array$1.difference;
lodash.differenceBy = array$1.differenceBy;
lodash.disj = utility.disj;
lodash.drop = array$1.drop;
lodash.dropRight = array$1.dropRight;
lodash.dropRightWhile = array$1.dropRightWhile;
lodash.dropWhile = array$1.dropWhile;
lodash.extend = object$1.extend;
lodash.extendWith = object$1.extendWith;
lodash.fill = array$1.fill;
lodash.filter = collection.filter;
lodash.flatten = array$1.flatten;
lodash.flattenDeep = array$1.flattenDeep;
lodash.flip = func$1.flip;
lodash.flow = utility.flow;
lodash.flowRight = utility.flowRight;
lodash.functions = object$1.functions;
lodash.groupBy = collection.groupBy;
lodash.initial = array$1.initial;
lodash.intersection = array$1.intersection;
lodash.intersectionBy = array$1.intersectionBy;
lodash.invert = object$1.invert;
lodash.invoke = collection.invoke;
lodash.iteratee = utility.iteratee;
lodash.juxt = utility.juxt;
lodash.keyBy = collection.keyBy;
lodash.keys = keys;
lodash.keysIn = object$1.keysIn;
lodash.map = collection.map;
lodash.mapKeys = object$1.mapKeys;
lodash.mapValues = object$1.mapValues;
lodash.matches = utility.matches;
lodash.matchesProperty = utility.matchesProperty;
lodash.memoize = func$1.memoize;
lodash.merge = object$1.merge;
lodash.mergeWith = object$1.mergeWith;
lodash.method = utility.method;
lodash.methodOf = utility.methodOf;
lodash.mixin = mixin$1;
lodash.modArgs = func$1.modArgs;
lodash.modArgsSet = func$1.modArgsSet;
lodash.negate = func$1.negate;
lodash.nthArg = utility.nthArg;
lodash.omit = object$1.omit;
lodash.omitBy = object$1.omitBy;
lodash.once = func$1.once;
lodash.pairs = object$1.pairs;
lodash.partial = func$1.partial;
lodash.partialRight = func$1.partialRight;
lodash.partition = collection.partition;
lodash.pick = object$1.pick;
lodash.pickBy = object$1.pickBy;
lodash.property = utility.property;
lodash.propertyOf = utility.propertyOf;
lodash.pull = array$1.pull;
lodash.pullAll = array$1.pullAll;
lodash.pullAllBy = array$1.pullAllBy;
lodash.pullAt = array$1.pullAt;
lodash.range = utility.range;
lodash.rearg = func$1.rearg;
lodash.reject = collection.reject;
lodash.remove = array$1.remove;
lodash.rest = func$1.rest;
lodash.reverse = array$1.reverse;
lodash.sampleSize = collection.sampleSize;
lodash.set = object$1.set;
lodash.setWith = object$1.setWith;
lodash.shuffle = collection.shuffle;
lodash.slice = array$1.slice;
lodash.sortBy = collection.sortBy;
lodash.sortByOrder = collection.sortByOrder;
lodash.sortedUniq = array$1.sortedUniq;
lodash.sortedUniqBy = array$1.sortedUniqBy;
lodash.spread = func$1.spread;
lodash.tail = array$1.tail;
lodash.take = array$1.take;
lodash.takeRight = array$1.takeRight;
lodash.takeRightWhile = array$1.takeRightWhile;
lodash.takeWhile = array$1.takeWhile;
lodash.tap = chain$1.tap;
lodash.throttle = func$1.throttle;
lodash.thru = thru;
lodash.times = utility.times;
lodash.toArray = lang.toArray;
lodash.toPath = utility.toPath;
lodash.toPlainObject = lang.toPlainObject;
lodash.transform = object$1.transform;
lodash.union = array$1.union;
lodash.unionBy = array$1.unionBy;
lodash.uniq = array$1.uniq;
lodash.uniqBy = array$1.uniqBy;
lodash.unset = object$1.unset;
lodash.unzip = array$1.unzip;
lodash.unzipWith = array$1.unzipWith;
lodash.values = object$1.values;
lodash.valuesIn = object$1.valuesIn;
lodash.without = array$1.without;
lodash.words = string.words;
lodash.wrap = func$1.wrap;
lodash.xor = array$1.xor;
lodash.xorBy = array$1.xorBy;
lodash.zip = array$1.zip;
lodash.zipObject = array$1.zipObject;
lodash.zipWith = array$1.zipWith;
// Add aliases.
lodash.each = collection.forEach;
lodash.eachRight = collection.forEachRight;
// Add functions to `lodash.prototype`.
mixin$1(lodash, lodash);
// Add functions that return unwrapped values when chaining.
lodash.add = math.add;
lodash.attempt = utility.attempt;
lodash.camelCase = string.camelCase;
lodash.capitalize = string.capitalize;
lodash.ceil = math.ceil;
lodash.clamp = number.clamp;
lodash.clone = lang.clone;
lodash.cloneDeep = lang.cloneDeep;
lodash.cloneDeepWith = lang.cloneDeepWith;
lodash.cloneWith = lang.cloneWith;
lodash.deburr = string.deburr;
lodash.endsWith = string.endsWith;
lodash.eq = lang.eq;
lodash.escape = string.escape;
lodash.escapeRegExp = string.escapeRegExp;
lodash.every = collection.every;
lodash.find = collection.find;
lodash.findIndex = array$1.findIndex;
lodash.findKey = object$1.findKey;
lodash.findLast = collection.findLast;
lodash.findLastIndex = array$1.findLastIndex;
lodash.findLastKey = object$1.findLastKey;
lodash.floor = math.floor;
lodash.forEach = collection.forEach;
lodash.forEachRight = collection.forEachRight;
lodash.forIn = object$1.forIn;
lodash.forInRight = object$1.forInRight;
lodash.forOwn = object$1.forOwn;
lodash.forOwnRight = object$1.forOwnRight;
lodash.get = object$1.get;
lodash.gt = lang.gt;
lodash.gte = lang.gte;
lodash.has = object$1.has;
lodash.hasIn = object$1.hasIn;
lodash.head = array$1.head;
lodash.identity = identity;
lodash.includes = collection.includes;
lodash.indexOf = array$1.indexOf;
lodash.inRange = number.inRange;
lodash.isArguments = lang.isArguments;
lodash.isArray = isArray;
lodash.isArrayLike = lang.isArrayLike;
lodash.isArrayLikeObject = lang.isArrayLikeObject;
lodash.isBoolean = lang.isBoolean;
lodash.isDate = lang.isDate;
lodash.isElement = lang.isElement;
lodash.isEmpty = lang.isEmpty;
lodash.isEqual = lang.isEqual;
lodash.isEqualWith = lang.isEqualWith;
lodash.isError = lang.isError;
lodash.isFinite = lang.isFinite;
lodash.isFunction = lang.isFunction;
lodash.isInteger = lang.isInteger;
lodash.isMatch = lang.isMatch;
lodash.isMatchWith = lang.isMatchWith;
lodash.isNaN = lang.isNaN;
lodash.isNative = lang.isNative;
lodash.isNil = lang.isNil;
lodash.isNull = lang.isNull;
lodash.isNumber = lang.isNumber;
lodash.isObject = isObject;
lodash.isObjectLike = lang.isObjectLike;
lodash.isPlainObject = lang.isPlainObject;
lodash.isRegExp = lang.isRegExp;
lodash.isSafeInteger = lang.isSafeInteger;
lodash.isString = lang.isString;
lodash.isTypedArray = lang.isTypedArray;
lodash.isUndefined = lang.isUndefined;
lodash.kebabCase = string.kebabCase;
lodash.last = last;
lodash.lastIndexOf = array$1.lastIndexOf;
lodash.lowerCase = string.lowerCase;
lodash.lowerFirst = string.lowerFirst;
lodash.lt = lang.lt;
lodash.lte = lang.lte;
lodash.max = math.max;
lodash.maxBy = math.maxBy;
lodash.min = math.min;
lodash.minBy = math.minBy;
lodash.noop = utility.noop;
lodash.now = date.now;
lodash.pad = string.pad;
lodash.padLeft = string.padLeft;
lodash.padRight = string.padRight;
lodash.parseInt = string.parseInt;
lodash.random = number.random;
lodash.reduce = collection.reduce;
lodash.reduceRight = collection.reduceRight;
lodash.repeat = string.repeat;
lodash.result = object$1.result;
lodash.round = math.round;
lodash.sample = collection.sample;
lodash.size = collection.size;
lodash.snakeCase = string.snakeCase;
lodash.some = collection.some;
lodash.sortedIndex = array$1.sortedIndex;
lodash.sortedIndexBy = array$1.sortedIndexBy;
lodash.sortedIndexOf = array$1.sortedIndexOf;
lodash.sortedLastIndex = array$1.sortedLastIndex;
lodash.sortedLastIndexBy = array$1.sortedLastIndexBy;
lodash.sortedLastIndexOf = array$1.sortedLastIndexOf;
lodash.startCase = string.startCase;
lodash.startsWith = string.startsWith;
lodash.sum = math.sum;
lodash.sumBy = math.sumBy;
lodash.template = string.template;
lodash.toInteger = toInteger;
lodash.toLower = string.toLower;
lodash.toSafeInteger = lang.toSafeInteger;
lodash.toString = lang.toString;
lodash.toUpper = string.toUpper;
lodash.trim = string.trim;
lodash.trimLeft = string.trimLeft;
lodash.trimRight = string.trimRight;
lodash.trunc = string.trunc;
lodash.unescape = string.unescape;
lodash.uniqueId = utility.uniqueId;
lodash.upperCase = string.upperCase;
lodash.upperFirst = string.upperFirst;
// Add aliases.
lodash.first = array$1.head;
mixin$1(lodash, (function() {
var source = {};
baseForOwn(lodash, function(func, methodName) {
if (!hasOwnProperty$7.call(lodash.prototype, methodName)) {
source[methodName] = func;
}
});
return source;
}()), { 'chain': false });
/**
* The semantic version number.
*
* @static
* @memberOf _
* @type string
*/
lodash.VERSION = VERSION;
(lodash.templateSettings = string.templateSettings).imports._ = lodash;
// Assign default placeholders.
arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
lodash[methodName].placeholder = lodash;
});
// Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
arrayEach(['drop', 'take'], function(methodName, index) {
LazyWrapper.prototype[methodName] = function(n) {
var filtered = this.__filtered__;
if (filtered && !index) {
return new LazyWrapper(this);
}
n = n === undefined ? 1 : nativeMax$9(toInteger(n), 0);
var result = this.clone();
if (filtered) {
result.__takeCount__ = nativeMin$4(n, result.__takeCount__);
} else {
result.__views__.push({ 'size': nativeMin$4(n, MAX_ARRAY_LENGTH$2), 'type': methodName + (result.__dir__ < 0 ? 'Right' : '') });
}
return result;
};
LazyWrapper.prototype[methodName + 'Right'] = function(n) {
return this.reverse()[methodName](n).reverse();
};
});
// Add `LazyWrapper` methods that accept an `iteratee` value.
arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
var type = index + 1,
isFilter = type != LAZY_MAP_FLAG;
LazyWrapper.prototype[methodName] = function(iteratee) {
var result = this.clone();
result.__iteratees__.push({ 'iteratee': baseIteratee(iteratee, 3), 'type': type });
result.__filtered__ = result.__filtered__ || isFilter;
return result;
};
});
// Add `LazyWrapper` methods for `_.head` and `_.last`.
arrayEach(['head', 'last'], function(methodName, index) {
var takeName = 'take' + (index ? 'Right' : '');
LazyWrapper.prototype[methodName] = function() {
return this[takeName](1).value()[0];
};
});
// Add `LazyWrapper` methods for `_.initial` and `_.tail`.
arrayEach(['initial', 'tail'], function(methodName, index) {
var dropName = 'drop' + (index ? '' : 'Right');
LazyWrapper.prototype[methodName] = function() {
return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
};
});
LazyWrapper.prototype.compact = function() {
return this.filter(identity);
};
LazyWrapper.prototype.find = function(predicate) {
return this.filter(predicate).head();
};
LazyWrapper.prototype.findLast = function(predicate) {
return this.reverse().find(predicate);
};
LazyWrapper.prototype.reject = function(predicate) {
predicate = baseIteratee(predicate, 3);
return this.filter(function(value) {
return !predicate(value);
});
};
LazyWrapper.prototype.slice = function(start, end) {
start = start ? toInteger(start) : 0;
var result = this;
if (result.__filtered__ && (start > 0 || end < 0)) {
return new LazyWrapper(result);
}
if (start < 0) {
result = result.takeRight(-start);
} else if (start) {
result = result.drop(start);
}
if (end !== undefined) {
end = toInteger(end);
result = end < 0 ? result.dropRight(-end) : result.take(end - start);
}
return result;
};
LazyWrapper.prototype.takeRightWhile = function(predicate) {
return this.reverse().takeWhile(predicate).reverse();
};
LazyWrapper.prototype.toArray = function() {
return this.take(MAX_ARRAY_LENGTH$2);
};
// Add `LazyWrapper` methods to `lodash.prototype`.
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
isTaker = /^(?:head|last)$/.test(methodName),
retUnwrapped = isTaker || /^find/.test(methodName),
lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName];
if (!lodashFunc) {
return;
}
lodash.prototype[methodName] = function() {
var args = isTaker ? [1] : arguments,
value = this.__wrapped__,
isLazy = value instanceof LazyWrapper,
iteratee = args[0],
useLazy = isLazy || isArray(value);
var interceptor = function(value) {
var result = lodashFunc.apply(lodash, arrayPush([value], args));
return (isTaker && chainAll) ? result[0] : result;
};
if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
// Avoid lazy use if the iteratee has a "length" value other than `1`.
isLazy = useLazy = false;
}
var action = { 'func': thru, 'args': [interceptor], 'thisArg': undefined },
chainAll = this.__chain__,
isHybrid = !!this.__actions__.length,
isUnwrapped = retUnwrapped && !chainAll,
onlyLazy = isLazy && !isHybrid;
if (!retUnwrapped && useLazy) {
value = onlyLazy ? value : new LazyWrapper(this);
var result = func.apply(value, args);
result.__actions__.push(action);
return new LodashWrapper(result, chainAll);
}
if (isUnwrapped && onlyLazy) {
return func.apply(this, args);
}
result = this.thru(interceptor);
return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
};
});
// Add `Array` and `String` methods to `lodash.prototype`.
arrayEach(['join', 'pop', 'push', 'replace', 'shift', 'sort', 'splice', 'split', 'unshift'], function(methodName) {
var func = (/^(?:replace|split)$/.test(methodName) ? stringProto : arrayProto$1)[methodName],
chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
retUnwrapped = /^(?:join|pop|replace|shift)$/.test(methodName);
lodash.prototype[methodName] = function() {
var args = arguments;
if (retUnwrapped && !this.__chain__) {
return func.apply(this.value(), args);
}
return this[chainName](function(value) {
return func.apply(value, args);
});
};
});
// Map minified function names to their real names.
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
var lodashFunc = lodash[methodName];
if (lodashFunc) {
var key = (lodashFunc.name + ''),
names = realNames[key] || (realNames[key] = []);
names.push({ 'name': methodName, 'func': lodashFunc });
}
});
realNames[createHybridWrapper(undefined, BIND_KEY_FLAG$1).name] = [{ 'name': 'wrapper', 'func': undefined }];
// Add functions to the lazy wrapper.
LazyWrapper.prototype.clone = lazyClone;
LazyWrapper.prototype.reverse = lazyReverse;
LazyWrapper.prototype.value = lazyValue;
// Add chaining functions to the `lodash` wrapper.
lodash.prototype.chain = chain$1.wrapperChain;
lodash.prototype.commit = chain$1.commit;
lodash.prototype.concat = chain$1.concat;
lodash.prototype.next = chain$1.next;
lodash.prototype.plant = chain$1.plant;
lodash.prototype.reverse = chain$1.reverse;
lodash.prototype.run = lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = chain$1.value;
if (iteratorSymbol$1) {
lodash.prototype[iteratorSymbol$1] = chain$1.toIterator;
}
console.log(zipObject(chunk(['a', 'b', 'c', 'd'], 2)));
})();
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