1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>去重</title>
6 </head>
7 <body>
8 <script type="text/javascript">
9 /*数组去重*/
10 function quchong(arr){
11 var len = arr.length;
12 arr.sort();
13 for(var i=len-1;i>0;i--){
14 if(arr[i]==arr[i-1]){
15 arr.splice(i,1);
16 }
17 }
18 return arr;
19 }
20 var a = ["a","a","b",'b','c','c','a','d'];
21 var b = quchong(a);
22 console.log(b);
23 /*字符串去重*/
24 function quchongstr(str){
25 var a = str.match(/S+/g);//等价于str.split(/s+/g)// s空白符，S非空白符
26 a.sort();
27 for(var i=a.length-1;i>0;i--){
28 if(a[i]==a[i-1]){
29 a.splice(i,1);
30 }
31 }
32 return a.join(" ");
33 }
34 var str = quchongstr("a a b a b e");
35 console.log(str);
36
37 </script>
38 </body>
39 </html>
