js原型式继承实现方法

function object(o){
    function F(){};
    F.prototype = o;
    return new F();
  }

//在object()函数的内部，先创建了一个临时性的构造函数，然后将传入的对象作为这个构造函数的原型，最后返回了这个临时类型的一个新实例
  var person = {
    name:"Nick",
    friends:["xiaowang","xiaochen"]
  };
  var person1 = object(person);
  person1.name = "Mike";
  person1.friends.push("xiaozhang");

  var person2 = object(person);
  person2.name = "lifei";
  person2.friends.push("xiaoli");
  console.log("person1:" + person1.name);
  console.log("person2:" + person2.name)
  console.log("person1 friends:" + person1.friends);
  console.log("person2 friends:" + person2.friends);
  console.log("all friends:" + person.friends);