document.writeln("hello world!");

 

 Function.prototype.method = function (name, func) {

     this.prototype[name] = func;

     return this;

 };

 

 

 if (typeof Object.create !== 'function') {

     Object.create = function (o) {

 	var F = function () {};

 	F.prototype = o;

 	return new F();

     };}

 

 Number.method('integer', function ( ) {

 	return Math[this < 0 ? 'ceil' : 'floor'](this);

     });

 

 String.method('trim', function ( ) {

 	return this.replace(/^\s+|\s+$/g, '');

     });

 

 

 document.writeln((-10 / 3).integer( ));

 

 document.writeln("whatev     ".trim());

 document.writeln("whatev     ");

 

 Function.method('curry', function ( ) {

 	var slice = Array.prototype.slice,

 	    args = slice.apply(arguments),

 	    that = this;

 	return function ( ) {

 	    return that.apply(null, args.concat(slice.apply(arguments)));

 	};

     });

 

 var memoizer = function (memo, formula) {

     var recur = function (n) {

 	var result = memo[n];

 	if (typeof result !== 'number') {

 	    result = formula(recur, n);

 	    memo[n] = result;

 	}

 	return result;

     };

     return recur;

 };