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JavaScript ---案例(统计字符出现次数)

 统计字符出现次数

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var str = "abcabcabbbbbbbbbbbb"

        var obj = {}
        for(var i=0;i<str.length;i++){
            console.log(str[i])
            var key = str[i]

            if(obj[key]){
                obj[key]++
            }else{
                obj[key] = 1
            }
        }
        console.log(obj)
    </script>
</body>
</html>


原文地址:https://blog.csdn.net/weixin_58694594/article/details/142425701

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