1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>模拟Java中的Map</title>
6
7 <script>
8
9 function Map(){
10
11 var obj = {};
12 //put 方法
13
14 this.put = function(key , value){
15 obj[key] = value;
16 }
17
18 //size 方法
19
20 this.size = function(){
21 var count = 0;
22 for(var attr in obj){
23 count++;
24 }
25 return count;
26 }
27
28 //get方法
29
30 this.get = function(key){
31 //判断key是否存在
32 if(key || obj[key] === 0 || obj[key] === false){
33 return obj[key];
34 }else{
35 return null;
36 }
37 }
38
39 //remove 方法
40
41 this.remove = function(key){
42 if(key || obj[key] || obj[key] === false){
43 delete obj[key];
44 }
45 }
46
47 //eachMap 方法
48
49 this.eachMap = function(fn){
50 for(var attr in obj){
51 fn(attr ,obj[attr]);
52 }
53 }
54
55
56
57 }
58
59
60
61 var m = new Map();
62 m.put(‘1‘,‘123‘);
63 m.put(‘2‘,true);
64 m.put(‘3‘,false);
65 m.put(‘4‘,new Date());
66
67 alert(m.size());
68 alert(m.get(‘2‘));
69 m.remove(‘4‘);
70 m.eachMap(function(key,value){
71 alert(key + "：" + value);
72 });
73
74
75 </script>
76
77
78
79 </head>
80 <body>
81
82 </body>
83 </html>
时间： 2024-11-02 01:32:57