Here you can find the source of forEach(callback, context)
Array.prototype.forEach = Array.prototype.forEach || function (callback, context) { context = context || window;// ww w .j ava2 s . c o m var l = this.length; for (var i = 0; i < l; i++) callback.call(context, this[i], i, this); };
"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 = 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); }; ...
Array.prototype.forEach = function(cb){ for(var k in this) cb(this[k]); };
Array.prototype.forEach = function(cb) { for (var i = 0; i < this.length; i++) { cb(this[i]); };