A versatile JavaScript

Recently saw an article written to the flexible JavaScript, is very exclamation of the power of JavaScript.

<script language= "JavaScript" > Number.prototype.add=function (x) {return this+x;    };   Number.prototype.subtract=function (x) {return this-x;   } ; Number.prototype.getrangearray=function () {var arr=[]; for (var i=0;i<=this;i++) {Arr.push (i);}    return arr; }; Number.prototype= Object.defineproperty (Number.prototype, "double", {get:function () {return (this+this);}});    Number.prototype= Object.defineproperty (Number.prototype, "Square", {get:function () {return (this*this);}});   5+2 Alert (5..add (2));     Alert (5[' Add '] (2));   Alert ((5). Add (2));   5+2-3 Alert (5..add (2). Subtract (3));   Alert (5[' Add '] (2) [' Subtract '] (3));   Alert ((5). Add (2) [' Subtract '] (3));    Alert (5..add (2) [' Subtract '] (3));   Array 0-5 alert ((5). Getrangearray ());     Alert (5..getRangeArray ());   Alert (5[' Getrangearray ');   The alert ((5). Double);   alert (5..double);   Alert (5[' double ']);   X*x Alert ((5). Square);   alert (5..square);   Alert (5[' square '); (5+5) * (5+5) ALert ((5). Double.square);   alert (5..double.square);   Alert (5[' double ' [' Square ']); Alert (5[' Double '].square);</script>

A versatile JavaScript