通过函数选出数组中最大值和其索引;

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <script>
        var a = [2,3,4,5,6,9,1,2,3]
        function max(a){
            var c = a[0];
            var b = 0;
            for(var k in a){
                if(c<a[k]){
                    c = a[k]
                    console.log(k)
                }
            }
            return c;

        }
        console.log(max(a))
    </script>
</body>
</html>

 另一种方法:

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Document</title>
 6 </head>
 7 <body>
 8     <script>
 9         var a = [2,3,4,5,6,9,1,2,3]
10         // function max(a){
11         //     var c = a[0];
12         //     var b = 0;
13         //     for(var k in a){
14         //         if(c<a[k]){
15         //             c = a[k]
16         //             console.log(k)
17         //         }
18         //     }
19         //     return c;
20 
21         // }
22         // console.log(max(a))
23         Math.max.apply([],a)
24         console.log(a.indexOf(Math.max.apply([],a)))
25         
26     </script>
27 </body>
28 </html>

 

posted @ 2016-08-16 09:43  挥刀  阅读(461)  评论(0编辑  收藏  举报