普通数组排序 默认升序，回调函数处理后为降序 

 1 <!DOCTYPE html>
 2 <html>
 3     <head>
 4         <meta charset="utf-8" />
 5         <meta name="viewport" content="width=device-width, initial-scale=1">
 6         <title></title>
 7         <script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.js"></script>
 8     </head>
 9     <body>
10         <script>
11             var arr = [4, 3, 6, 5, 7, 2, 1];
12             var arr1 = arr.sort();
13             console.log(arr1[0]);
14             //输出结果[1,2,3,4,5,6,7]
15             var arr2 = arr.sort(function(a, b) {
16                 return b - a;
17             });
18             console.log(arr2);
19             //输出结果[7,6,5,4,3,2,1]
20         </script>
21     </body>
22 </html>

 

posted @ 2018-10-30 15:11  我爱大西瓜  阅读(197)  评论(0)    收藏  举报