Nodejs Utililty Methods Object Bind

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

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

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

"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;
...

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

Object.prototype.mapWithKey = function(f) {
  var result = new Array();
  for (var key in this) {
    result[result.length] = f(key, this[key]);
  };
  return result;
};

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