JavaScript面向对象编程（11）其他继承方式

1、
将父对象作为新对象的原型

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1function object(o) {

2   var n;

3   function F() {}

4   F.prototype = o;

5   n = new F();

6   n.uber = o;

7   return n;

8}

9

10var shape = {

11  name: 'Shape',

12  toString: function(){

13          if(this.uber)

14              return this.uber.toString() + ', ' + this.name;

15          else

16              return this.name;

17      }

18}

19var twoDShape = object(shape);

20twoDShape.name = "2 D Shape";

21alert(twoDShape.toString());

22

2、在子构造器中调用父构造器Parent.apply();并传递参数，这样与父对象的this绑定的属性同时成为子对象的属性

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1function Shape(id) {

2   this.id = id;

3

4}

5Shape.prototype.name = 'shape';

6Shape.prototype.toString = function(){return this.name;};

7

8function Triangle() {

9   Shape.apply(this, arguments);//原生属性继承

10}

11