arian

// http://jsperf.com/function-proto-bind/3
Function.prototype.bind = function(that){
    var self = this,
        args = arguments.length > 1 ? Array.slice(arguments, 1) : null,
        F = function(){};

    var bound = function(){
        var context = that, length = arguments,length;
        if (this instanceof bound){
            F.prototype = self.prototype;

arian

// A memoize function to store function results of heavy functions
// http://jsfiddle.net/arian/UQsEA/1/


(function(slice){

Function.prototype.memoize = function(hashFn, bind){
    var cache = {}, self = bind ? this.bind(bind) : this, hashFn = hashFn || JSON.stringify;
    return function(){
        return ((key = hashFn(slice.call(arguments))) in cache)