jwgoedert

//takes a collection and returns a boolean if any of the
//values pass the test
_.some = function some(collection, fn){
    var isTrue = false;
    var isFalse = true;
    if(_.typeOf(fn) !== 'function') fn = _.identity;//why this is?
    _.each(collection, function(el, i, collection){
        fn(el, i, collection) ? isTrue = true : isFalse = false;
    });
    if (isTrue === false) return false;

jwgoedert

//takes a collection and test and returns a boolean if 
//all values pass the test
_.every = (col, test) => {
    if (!test) test = _.identity;
    let passed = true;
    _.each(col, (item, i, col) =>{
        if(!test(item, i, col)) passed = false;
    });
    return passed
};

jwgoedert

//takes a collection and checks if it has a value in it
_.contains = function contains(collection, value){
    var tOrF = false;
    var valIs;
    _.each(collection, function(el, i, collection){
        tOrF = (el === value ? valIs = true : false);        
    });
    if (valIs !== undefined) return valIs;
    return tOrF;
}

jwgoedert

//takes an array and property and returns an array of those values
_.pluck = function pluck(arr, property){
    var values = [];
    _.map(arr, function(el, i, arr){
        values.push(el[property]);
        
    });
    return values;
}

jwgoedert

//takes a collection and  a function with (el,i,col)
//and returns a new collections modified
_.map1 = function map(collection, fn){
    var newCollection = [];
    _.each(collection, function(el, i, collection){
        newCollection.push(fn(el,i,collection));        
    });
    return newCollection;
}
//steve

jwgoedert

//takes an array and returns an array of unique values
_.unique =  function unique(list){
 var unArray = [];
 _.each(list, function(el, i, list){
     if(_.indexOf(unArray, el) === -1) unArray.push(el);
 });    
    return unArray;
}

jwgoedert

//takes an array and a function and returns two arrays that
//are falsey and truthy
"use strict";

_.partition1 = function (list, test) {
    var truthy = [];
    var falsey = [];
    _.each(list, function (el, i, list) {
        if (test(el, i, list)) truthy.push(el);
        if (test(el, i, list) !== true) falsey.push(el);

jwgoedert

/* Reject works like filter but in reverse, it returns an
array containing all the elements that did't pass the test.
*/
//version using each
_.reject = function(list, test){
    var newArr = [];
    _.each(list, function(el, i, list){
       if(test(el, i, list) !== true) newArr.push(el); 
    });
    return newArr;

jwgoedert

/*Filter takes an array and a callback function that passes 
a test with available (element, index, array) arguments and
returns an array with all the values that pass the test.
*/

_.filter = function filter(list, test){
    var newArr = [];
    _.each(list, function(el, i, list){
        if (test(el, i, list)) newArr.push(el);
        });

jwgoedert

//takes an array and a value and returns the first index 
//where that value appears.
//this version uses 'each' to iterate through the array.

_.indexOf = function(list, val){
    let outVal = -1;
    _.each(list, function(el, i, list){
      if(outVal === -1 && el === val) outVal = i;  
    });
    return outVal;