inheritPrototypal.js

// 原型式继承

// 其基本思路是借助原型可以基于已有的对象创建新的对象

function object(o){

 function F(){}

 F.prototype = o;

 return new F();

}

var person = {

  name: "Tom",

  friends:  ["Jack", "John", "Kim"]

};

var David = object(person);

David.name = "David";

David.friends.push("Amy");

console.log(David.friends);// ["Jack", "John", "Kim", "Amy"]

var Rob = object(person);

Rob.name = "Rob";

console.log(Rob.friends);// ["Jack", "John", "Kim", "Amy"]