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December 30, 2014 21:27
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// Copyright Joyent, Inc. and other Node contributors. | |
// | |
// Permission is hereby granted, free of charge, to any person obtaining a | |
// copy of this software and associated documentation files (the | |
// "Software"), to deal in the Software without restriction, including | |
// without limitation the rights to use, copy, modify, merge, publish, | |
// distribute, sublicense, and/or sell copies of the Software, and to permit | |
// persons to whom the Software is furnished to do so, subject to the | |
// following conditions: | |
// | |
// The above copyright notice and this permission notice shall be included | |
// in all copies or substantial portions of the Software. | |
// | |
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN | |
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | |
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
// USE OR OTHER DEALINGS IN THE SOFTWARE. | |
// NOTE: These type checking functions intentionally don't use `instanceof` | |
// because it is fragile and can be easily faked with `Object.create()`. | |
function isArray(ar) { | |
return Array.isArray(ar); | |
} | |
exports.isArray = isArray; | |
function isBoolean(arg) { | |
return typeof arg === 'boolean'; | |
} | |
exports.isBoolean = isBoolean; | |
function isNull(arg) { | |
return arg === null; | |
} | |
exports.isNull = isNull; | |
function isNullOrUndefined(arg) { | |
return arg == null; | |
} | |
exports.isNullOrUndefined = isNullOrUndefined; | |
function isNumber(arg) { | |
return typeof arg === 'number'; | |
} | |
exports.isNumber = isNumber; | |
function isString(arg) { | |
return typeof arg === 'string'; | |
} | |
exports.isString = isString; | |
function isSymbol(arg) { | |
return typeof arg === 'symbol'; | |
} | |
exports.isSymbol = isSymbol; | |
function isUndefined(arg) { | |
return arg === void 0; | |
} | |
exports.isUndefined = isUndefined; | |
function isRegExp(re) { | |
return isObject(re) && objectToString(re) === '[object RegExp]'; | |
} | |
exports.isRegExp = isRegExp; | |
function isObject(arg) { | |
return typeof arg === 'object' && arg !== null; | |
} | |
exports.isObject = isObject; | |
function isDate(d) { | |
return isObject(d) && objectToString(d) === '[object Date]'; | |
} | |
exports.isDate = isDate; | |
function isError(e) { | |
return isObject(e) && objectToString(e) === '[object Error]'; | |
} | |
exports.isError = isError; | |
function isFunction(arg) { | |
return typeof arg === 'function'; | |
} | |
exports.isFunction = isFunction; | |
function isPrimitive(arg) { | |
return arg === null || | |
typeof arg === 'boolean' || | |
typeof arg === 'number' || | |
typeof arg === 'string' || | |
typeof arg === 'symbol' || // ES6 symbol | |
typeof arg === 'undefined'; | |
} | |
exports.isPrimitive = isPrimitive; | |
function isBuffer(arg) { | |
return arg instanceof Buffer; | |
} | |
exports.isBuffer = isBuffer; | |
function objectToString(o) { | |
return Object.prototype.toString.call(o); | |
} |
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