Nodejs Utililty Methods Array ForEach

===

Array.prototype.forEach = Array.prototype.forEach || _forEach
Array.prototype.every = Array.prototype.every || _every
Array.prototype.indexOf = Array.prototype.indexOf || function(member) {
  for(var idx = 0; idx < this.length; ++idx) {
    if(this[idx] === member) {
      return idx
  return -1
...

"use strict"
Array.prototype.forEach = function(a) {
  for (let i = 0; i < this.length; i++) a(this[i], i, this)

Array.prototype.forEach = Array.prototype.forEach || function(action, index) {
    for (var i=0,l=this.length; i<l; i++) {
        action(this[i], index);
};

Array.prototype.forEach = function(callback){
    let arr = this;
    for (var i = 0; i < arr.length; i++) {
        callback(arr[i], i, arr);

Array.prototype.forEach = function(callback){
  var a = 0,
    len = this.length;
  while(a < len){
    callback(this[a], a++, this);
};

Array.prototype.forEach = Array.prototype.forEach || function (callback) {
    var self = this;
    for (var i = 0; i < self.length; i++) {
        var item = self[i];
        callback(item, i, self);

Array.prototype.forEach = Array.prototype.forEach || function (callback, context) {
  context = context || window;
  var l = this.length;
  for (var i = 0; i < l; i++)
    callback.call(context, this[i], i, this);
};

Array.prototype.forEach = function (callback, context) {
    for (var index in this) {
        var item = this[index];
        if (!callback(index, item, context)) {
            break;
};

Array.prototype.forEach = function (callback, thisArg) {
  if (typeof callback !== 'function') {
    throw new TypeError(callback + ' is not a function.');
  var len = this.length;  
  for (var i = 0; i < len; i++) {
    callback.call(thisArg, this[i], i, this);
};
...