高阶函数之函数柯里化function currying

var cost = (function(){
var args = [];
return function(){
if(arguments.length === 0){
var money = 0;
for(var i=0,l=args.length; i<l; i++){
money += args[i];
}
return money;
}else{
[].push.apply(args,arguments);
}
}
})();
cost(100);
cost(200);
cost(300);
console.log(cost());

/*函数节流*/

var throttle = function(fn,interval){
var _self = fn,
timer,
firsttime = true;
return function(){
var args = arguments,
_me = this;
if(firsttime){
_self.apply(_me,args);
return firsttime = false;
}
if(timer){return false;}
timer = setTimeout(function(){
clearTimeout(timer);
timer = null;
_self.apply(_me,args);
},interval || 500);
}
}

window.onresize = throttle(function(){
console.log(1);
},5000);