Nodejs Array ForEach forEach(fn)

Method Source Code

Array.prototype.forEach=function(fn){
    var arr=this;
    var length=this.length;
    for(var i=0;i<length;i++){
        fn(arr[i],i,arr);/*from   w  ww.  j  a va 2 s  . co m*/
    }
}

Related

1. 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);
   };
   ...
   

2. forEach(cb)

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

3. forEach(cb)

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

4. forEach(cb)

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

5. forEach(fn)

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

6. forEach(fn)

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

7. 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);
   ...
   

8. forEach(fun /*, thisp */)

   Array.prototype.forEach = Array.prototype.forEach || function(fun ) {
     "use strict";
     if (this === void 0 || this === null) throw new TypeError();
     var t = Object(this);
     var len = t.length >>> 0;
     if (typeof fun !== "function") throw new TypeError();
     var thisp = arguments[1];
     for (var i = 0; i < len; i++) {
       if (i in t) fun.call(thisp, t[i], i, t);
   ...
   

9. forEach(fun /*, thisp*/)

   Array.prototype.forEach = function(fun )
       var len = this.length;
       if (typeof fun != "function")
         throw new TypeError();
       var thisp = arguments[1];
       for (var i = 0; i < len; i++)
         if (i in this)
   ...