objectLiteral.js

// 1.任意参数的加法运算
        function add(){
           var sum = 0
           for(var i=0;i<arguments.length;i++){
               if(!isNaN(arguments[i])){
                 sum += parseFloat(arguments[i])
               }
           }
           return sum
        }
        console.log(add(1,2))
        console.log(add(1,2，3,4,5,6))


// 2.闭包
        var name = "cynthia"
        var obj = {
            name : "wuqian",
            sex : "girl",
            getName : function(){
                 return this.name
            } 
        }
        console.log(obj.getName()) //wuqian
        console.log(name)  //cynthai



// 3.调用对象字面量里的方法
        var cyn = {
            name : "wuqian",
            sex : "girl",
            Add : function(){
                var sum = 0
                for(var i=0;i<arguments.length;i++){
                   if(!isNaN(arguments[i])){
                     sum += parseFloat(arguments[i])        
                   }
                }
                return sum
            }  
        };
        cyn.say = function(){
            return "给对象字面量添加方法"
        }
        cyn.socre = "给对象字面量添加变量"

        console.log(cyn.Add(100,300))  //400
        console.log(cyn.say())  //给对象字面量添加方法
        console.log(cyn.socre)  //给对象字面量添加变量