打印出数组中的重复数, 重复几次 

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 * @Date: 2022-08-19 17:24:16
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<!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>重复次数</title>
</head>

<body>
    <script>
        // 打印出[1,1,1,1,1,1, 3,3,3,3,3,3,3,3,3,5,5,5,5]数组中的重复数, 重复几次

        var arr = [1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5];
　　　　　var count = 0;
        var str = {};
        for (var i = 0; i < arr.length;i++) {
            for (var j = i + 1; j < arr.length; j++) {
                if (arr[i] === arr[j]) {
                    count++;
                    // js中为对象添加属性和属性值
                    str[arr[i]] = count;
                }
            }
            i += count;
            count = 0;
        }
        //遍历对象
        for (let k in str) {
            console.log(`${k}重复次数${str[k]}次`);
        }
    </script>
</body>

</html>

 

posted @ 2022-08-20 20:07  丹江路39号  阅读(39)  评论(0)    收藏  举报