Nodejs Utililty Methods Array Each

Array.prototype.each = function (fn) {
  var i = 0, length = this.length, ret;
  fn = typeof fn === 'function' ? fn : function () {};
  for (; i < length; i++) {
    ret = fn.call(this[i], i, this[i]);
    if (ret === false || ret !== undefined && ret !== true) {
      return ret;
  return this;
};

Array.prototype.each = function(fn){
    fn = fn || Function.K;
     var a = [];
     var args = Array.prototype.slice.call(arguments, 1);
     for(var i = 0; i < this.length; i++){
         var res = fn.apply(this,[this[i],i].concat(args));
         if(res != null) a.push(res);
     return a;
...

Array.prototype.each = function(fn) {
  for(var i = 0; i < this.length; i++) {
    fn(i, this[i]);
  };
};

Array.prototype.each = function(fn, last) {
    if (typeof fn != "function") return false;
    for (var index = 0; index < this.length; index++) {
            fn(this[index], index);
    if (last) last();
};

Array.prototype.each = function(fnCallback) {
    var value = null;
    for (var elementIndex in this) {
        if (this.hasOwnProperty(elementIndex)) {
            value = fnCallback.apply(this[elementIndex], [elementIndex, value]);
    return (value) ? value : this;
};
...

Array.prototype.each = function(fun) {
    for (var i = 0; i < this.length; i++) {
        fun(this[i]);
};

function emptyFn() {}
function random(n) {
    return +n ? Math.floor(Math.random() * (n+1)) : Math.random();
Array.prototype.each = Object.prototype.each = Function.prototype.each = function(fun) {
    for (var key in this) {
        if (this.hasOwnProperty && this.hasOwnProperty(key)) {
            if (fun.call(this, this[key], key, this) === false) {
                return;
...

Array.prototype.each = function (func) {
    return _.each(this, func);
};

Array.prototype.each = function(func) {
  function each(array, func) {
  for (var i=0; i<array.length; ++i) {
    func.call(array[i], i);
 each(this, func); 
};

Array.prototype.each = function (func) {
  var arr = this;
  for (var i = 0; i < arr.length; i++) {
    func(arr[i]);