定义对象的四种方法

//字面量
var obj1 = { "name": "gao" };
   console.log(obj1.name)

// new Object;
var obj2 = new Object();
obj2.name = "wang";
   console.log(obj2);




// 构造函数

 function Xy(name) {
     this.name = name
 }

 var obj3 = new Xy("gao");
 console.log(obj3)

//工厂模式

function z(name) {
    var obj4 = { "name": name };
    return obj4
}

console.log(z("gao"));