JavaScript中call和apply方法的区别实例分析

func.call(this, arg1, arg2);
func.apply(this, [arg1, arg2]);

(function(){
 Array.prototype.push.call(arguments, 4);//arguments借用Array.prototype.push方法
 console.log( arguments ); //输出： [1, 2, 3, 4]
})(1, 2, 3);
var currying = function(fn){
  var args = [];
  return function(){
    if( arguments.length === 0){
      return fn.apply( this, args);
    }
    else{
      [].push.apply( args, arguments);
      return arguments.callee; //callee已弃用
    }
  }
};
var cost = (function(){
 var money = 0;
 return function(0{
   for(var i = 0,l - arguments.length;i<l;i++){
     money += arguments[i];
   }
   return money;
 }
})();

var cost_ = currying(cost); //将cost转化成curring函数
cost_(1); cost_(2); alert(cost_()); //输出：3