function Mother(age){
this.age=age;
this.num=["hello","world"];
}
Mother.prototype.printage=function(){
console.log(this.age);
}
function Person(name,age){
Mother.call(this,age);
this.name=name;
}
Person.prototype=new Mother();
Person.prototype.constructor=Person;
Person.prototype.printname=function(){
console.log(this.name);
}
var p1=new Person("jack",20);
p1;
上面的理解下 继承
分为组合继承 分为
1 组合继承
2 寄生组合继承
寄生组合继承理解有点问题