javascript设计模式-掺元类

 1 function augment(receivingClass,givingClass){
 2     if(arguments.length > 2){
 3         for(var i= 2, len = arguments.length;i<len;i++){
 4             receivingClass.prototype[arguments[i]] = givingClass.prototype[arguments[i]];
 5         }
 6     }else{
 7         for(var methodName in givingClass.prototype){
 8             if(!receivingClass.prototype[methodName]){
 9                 receivingClass.prototype[methodName] = givingClass.prototype[methodName];
10             }
11         }
12     }
13 }
14 
15 function Author(name,books){
16     this.name = name;
17     this.books = books;
18 }
19 Author.prototype.getBooks = function(){
20     return this.books;
21 }
22 
23 var MiXin = function(){};
24 MiXin.prototype = {
25     serialize:function(){
26         var output = [];
27         for(key in this){
28             output.push(key + ":" + this[key]);
29         }
30         return output.join(", ");
31     }
32 }
33 augment(Author,MiXin);
34 var author = new Author("zap","读书笔记");
35 console.log(author.serialize());