javascript深度克隆

 1 var oPerson={
 2     oName:"rookiebob",
 3     oAge:"18",
 4     oAddress:{
 5         province:"beijing"
 6     },    
 7     ofavorite:[
 8         "swimming",
 9         {reading:"history book"}
10     ],
11     skill:function(){
12         console.log("bob is coding");
13     }
14 };
15 function clone(obj){
16     var result={};
17     for(key in obj){
18         result[key]=obj[key];
19     }
20     return result;
21 }
22 var oNew=clone(oPerson);
23 console.log(oPerson.oAddress.province);//beijing
24 oNew.oAddress.province="shanghai";
25 console.log(oPerson.oAddress.province);//shanghai

 1 function deepClone(obj){
 2     var result,oClass=isClass(obj);
 3         //确定result的类型
 4     if(oClass==="Object"){
 5         result={};
 6     }else if(oClass==="Array"){
 7         result=[];
 8     }else{
 9         return obj;//此处如果用return result=obj;会大幅增加时间复杂度
10     }
11     for(key in obj){
12         var copy=obj[key];
13         if(isClass(copy)=="Object"){
14             result[key]=arguments.callee(copy);//递归调用
15         }else if(isClass(copy)=="Array"){
16             result[key]=arguments.callee(copy);
17         }else{
18             result[key]=obj[key];
19         }
20     }
21     return result;
22 }
23 //返回传递给他的任意对象的类
24 function isClass(o){
25     if(o===null) return "Null";
26     if(o===undefined) return "Undefined";
27     return Object.prototype.toString.call(o).slice(8,-1);//返回"[object type]"数组故需从数组第8个元素到最后一个元素截取“type”部分内容
28 }
29 var oPerson={
30     oName:"rookiebob",
31     oAge:"18",
32     oAddress:{
33         province:"beijing"
34     },    
35     ofavorite:[
36         "swimming",
37         {reading:"history book"}
38     ],
39     skill:function(){
40         console.log("bob is coding");
41     }
42 };
43 //深度克隆一个对象
44 var oNew=deepClone(oPerson);
45  
46 oNew.ofavorite[1].reading="picture";
47 console.log(oNew.ofavorite[1].reading);//picture
48 console.log(oPerson.ofavorite[1].reading);//history book
49  
50 oNew.oAddress.province="shanghai";
51 console.log(oPerson.oAddress.province);//beijing
52 console.log(oNew.oAddress.province);//shanghai