11月4

1.// 链式编程

function student(id,name){

    this.id =id;

    this.name =name;

    this.scores = [

         {subject:"html",score:90 },

         {subject:"js",score:90 }

     ],

     this.eat = function(food){

        console.log("吃" + food)

        return this

     },

     this.sleep = function(){

        console.log("睡")

        return this

     }

 }

 var stu = new student(1001,"张三");

 stu.eat("").sleep().eat("").sleep().eat("").sleep().eat("").sleep();// 链式编程

 

运行结果：

 

[Running] node "c:\Users\詹詹\Desktop\js\tempCodeRunnerFile.js"

吃

睡

吃

睡

吃

睡

吃

睡

[Done] exited with code=0 in 0.116 seconds

 

2. 可以拓展

//function

function student(id,name){

   this.id =id;

   this.name =name;

   this.scores = [

        {subject:"html",score:90 },

        {subject:"js",score:90 }

    ]

}

student.prototype.sex="男";

student.prototype.eat = function (food) {   //扩展

    console.log("吃" + food)

}

var stu = new student(1000,"张三");

stu.eat("米饭");

console.log(stu.sex)

运行结果：

[Running] node "c:\Users\詹詹\Desktop\js\tempCodeRunnerFile.js"

吃

睡

吃

睡

吃

睡

吃

睡

[Done] exited with code=0 in 0.116 seconds