Nodejs Object Bind mapWithKey(f)

Method Source Code

Object.prototype.mapWithKey = function(f) {
   var result = new Array();
   for (var key in this) {
      result[result.length] = f(key, this[key]);
   };//from w ww .  j  ava 2s .c  o  m
   return result;
};

Related

1. bind(method)

   Object.prototype.bind = function(method){
     var object  = this;
     return function(){
           method.apply(object, arguments);
       };
   

2. bind(prop)

   Object.prototype.bind = function (prop) {
       var self = this;
       var method = this[prop];
       return function () {
     return method.apply(self, arguments);
       };
   };
   

3. map(cb, thisArg)

   Object.prototype.map = function(cb, thisArg) {
     thisArg = thisArg || this;
     var that = this;
     Object.getOwnPropertyNames(this).map(function(name) {
       cb(name, that[name]);
     });
     return this;
   };
   

4. map(f)

   "use strict";
   var map = function(f, thing) {
     if(thing.map) {
       return thing.map(f);
     throw new Error("Object given does not implement map");
   };
   var square = function(x) {
     return x * x;
   ...
   

5. map(obj, callback)

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

6. addMixin(mixin)

   Object.prototype.addMixin = function (mixin) {    
     for (var prop in mixin) {
       if (mixin.hasOwnProperty(prop)) {
         this.prototype[prop] = mixin[prop];
   };