Nodejs Array ForEach forEach(cb)

Method Source Code

'use strict';/*w  w  w  . j av  a2  s .  c o  m*/

Array.prototype.forEach = function(cb) {
  for(let i = 0 ; i < this.length ; i++) {
    cb(this[i]);
  }
};

Related

1. forEach(callback, context)

   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);
   };
   

2. forEach(callback, context)

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

3. forEach(callback, thisArg)

   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);
   };
   ...
   

4. forEach(cb)

   Array.prototype.forEach = function(cb){
     for(var k in this) cb(this[k]);
   };
   

5. forEach(cb)

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

6. forEach(fn)

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

7. forEach(fn)

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

8. forEach(fn)

   Array.prototype.forEach = function(fn)
       for (var i=0;i<this.length;i++)
           fn(this[i]);
   

9. forEach(fn, context)

   Array.prototype.forEach = function(fn, context) {
     if (typeof fn != "function") {
       throw new TypeError(fn + " is not a function");
     if (typeof context === 'undefined') {
       context = this;
     for (var i = 0, l = this.length; i < l; ++i) {
       fn.call(context, this[i], i, this);
   ...