Nodejs Object Value Iterate forEach(callback, context)

Method Source Code

// Object.forEach
Object.prototype.forEach = function(callback, context) {
   var ctx = context || null;
    Object.keys(this).forEach(function (key) {
        callback.apply(ctx, [this[key], key]);
    }, this);/*  ww  w .j a  v  a  2 s  .c o m*/
};

Related

1. each(callback, context)

   Object.prototype.each = function (callback, context)
     var key, 
       value;
     for (key in this)
       if (this.hasOwnProperty( key ))
         value = this[key];
   ...
   

2. each(f)

   Object.prototype.each = function(f) {
     for(var key in this) {
       if(this.hasOwnProperty(key)) {
         f(key, this[key]);
   };
   

3. each(iterator)

   Object.prototype.each = function(iterator) {
     var key;
     for(key in this) {
       iterator(this[key], key);
   

4. each(object, callback, scope)

   Object.each = function(object, callback, scope) {
     for (var key in object) {
       callback.call(scope, key, object[key]);
   };
   

5. forEach(obj, callback)

   "use strict";
   Object.forEach = function(obj, callback) {
       return Object.keys(obj).forEach(key => callback(obj[key], key));
   

6. loopItems(action, defaultResult)

   Object.prototype.loopItems = function(action, defaultResult) {
       var key, result;
       for (key in this) {
           if (this.hasOwnProperty(key)) {
         result = action(key, this[key]);
         if (result !== undefined) {
       return result;
       return defaultResult;
   };