js查询字符串

写好了886最近学啥闭包快晕厥了（其实是困

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Login</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="index2.css" />
    <script src="main.js"></script>
</head>
    
<body>
        <!-- 用indexof查找一串字符中某个字符出现的次数 -->
    <script>
       var s="袁老师帅啊帅啊超级帅！！！";
       var target="帅";
       var count=0;
       var a=-1;
       var flag=0;
       function find(a){
            
            if(a==-1&&flag!=0)
                return 0;
            else{
                a=s.indexOf(target,a+1);
                count++;
                flag=1;
                return find(a);
            }
       }
       find(a);
       console.log(count-1);
    </script>
    
</body>

</html>

有3个"帅"呢

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先画饼

 

posted @ 2018-10-30 22:04  风间6324  阅读(233)  评论(0)  编辑  收藏  举报