Function.prototype.$concat = function(){
var funcs = [this].concat(Array.apply([], arguments));
return function(){
var ret = [];
for(var i = 0; i < funcs.length; i++){
var func = funcs[i] instanceof Function ? funcs[i] : new Function(funcs[i]);
ret.push(func.apply(this, arguments));
}
return ret;
}
}
//var concat = (function a(a){
// alert("a:"+a);
//}).$concat(function b(b){
// alert("b:"+b);
//});
//concat(1);

Function.prototype.$curry=function(){
with({that:this})
return function()
{
var args = Array.prototype.slice.call(arguments);
if(args.length<that.length)
{
return function(){
var _args = args.concat(Array.prototype.slice.call(arguments));
return that.$curry().apply(this,_args);
}
}
else return that.apply(this,args);
}
}
//var curry=(function f(a,b,c){
// alert([a,b,c]);
// }).$curry();
//curry(1)(2)(3);
//curry(1,2)(3);

Function.prototype.$bind=function(object){
var callback = function () {
return arguments[0];
}
with(object){
return eval('callback(' + this.toString() + ')');
}
}
//var obj = {a:1,b:2};
//var bind=(function (){
// a=10;
// b=11;
//}).$bind(obj);
//bind();
//alert(obj.a);

String.prototype.$format=function(){
var ret;
for(var i=1;i<arguments.length;i++){
var exp = new RegExp('//{' + (i-1) + '//}','gm');
ret = (ret||this).replace(exp,arguments[i-1]);
}
return ret;
}
//alert("{0},{1},{4}".$format(0,1,2));