javaScript - 对象的创建方式与遍历对象

1.使用对象字面量的方式：

    var person1={
      id: 1001,
      name: "levi",
      love: ["1","2","3"],
      say: function (arg){
        console.log(arg)
      }
    }
    var id=person1.id;
    person1.say("你好");

 

2.使用Object 关键字方式来创建

    var person2=new Object();
    person2.id=1001;
    person2.name="levi";
    person2.love=["1","2","3"];
    person2.say=function (arg){
      console.log(arg);
    }
    var id=person2.id;
    person2.say("你好");

 

3.用构造函数来创建

    function person3(id,name,love) {
      this.id=id;
      this.name=name;
      this.love=love;
      this.say=function (arg){
        console.log(arg);
      }
    }
    var human=new person3(1001,"levi",[1,2]);
    var id=human.id;
    human.say("你好");

 

遍历对象：

    //遍历对象
    for(var key in obj){
      var key_name=key;
      var value=obj[key];
    }