8-3 原型对象

  <script>
        function Stack(){
            this.items =[];
        }
        /*
        入栈 push
        出栈 pop
        peek 获取栈顶
        isEmpty  判断栈是否为空
        size 可以看栈中是否有多少个只
        */
       Stack.prototype.push = function(val){
        this.items.push(val);
       }
       Stack.prototype.pop = function(){
        var res = this.items.pop();
        return res;
       }
       Stack.prototype.peek = function(){
           return this.items[this.items.length-1]
       }
       var s =new Stack();
       s.push(2);
       s.push(3);
       console.log(s.items);
       //console.log(s.pop())
       console.log(s.peek())
    </script>

 <script>
        /*
        Members
        name
        age
        sex
        在Members原型上定义sayNamae方法 console.log(this.name)
        实例化自己和同桌
        08里面写
        */
        function Student(name,age,sex){
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
        Student.prototype.sayName = function(){
            console.log(this.name)
        }
        Student.prototype.saySkill = function(){
            console.log(this.age)
        }
        Student.prototype.saysex = function(){
            console.log(this.sex)
        }
        var p = new Student("韩磊",21,"男")
        console.log(p)
        p.sayName();
        p.saySkill();
        p.saysex();
        var g = new Student("高云锋",20,"男")
        console.log(g);
        g.sayName();
        g.saySkill();
        g.saysex();
    </script>