var newObject=new Object();//var newObject={};//1.直接设置属性newObject.hello1="hello 1";
    console.log(newObject.hello1)//2.中括号法newObject["hello2"]="hello 2";console.log(newObject.hello2);//3 设置对象属性，并修改现有属性的特性Object.defineProperty(newObject,"hello3",{value:"hello 3",writable:true,enumerable:true,configurable:true});console.log(newObject.hello3);//3的模板，添加多个属性时可减少代码量var defineProp=function(obj,key,value){//config.value=value; 书中此处的代码用了会报错：config is not defined，故修改了此处代码。var config = {value: value,writable: true,enumerable: true,configurable: true};Object.defineProperty(obj,key,config);};var person=Object.create(null);defineProp(person,"language","js");defineProp(person,"birthday","1989");defineProp(person,"hasBeard",false);//遍历打印person的所有属性for (var obj in person) {console.log(obj + ' : ' + person[obj]);}//4 设置对象属性的另一种方法
    Object.defineProperties(newObject,{"someKey":{value:"hello world",writable:true},"anotherKey":{value:"foo bar",writable:false}});//此处打印用for循环为空，原因不明
    console.log(newObject.someKey);console.log(newObject.anotherKey);//5 继承，子类会获得父类的属性var driver=Object.create(person);defineProp(driver,"topSpeed","100mph");for (var obj in driver) {console.log(obj + ' : ' + driver[obj]);}

    //简单的构造器模式function Car(model,year,miles){this.model=model;this.year=year;this.miles=miles;this.toString=function(){return this.model+" has done "+this.miles+" miles";}}

//带原型的构造器function Car(model,year,miles){this.model=model;this.year=year;this.miles=miles;};Car.prototype.toString=function(){return this.model+" has done "+this.miles+" miles";};