Question

我尝试使用递归循环将某些属性写入html，但不能使代码工作：（

我在Json中看到了哈希数组。具有以下属性：serno - 序列号，parent_serno - 父序列号，名称 - 属性的名称。我想先写下每个hash.name，其中包含＆＃34; parent_serno == 0＆＃34;然后在每一个之后我想要写出具有＆＃34; parent_serno = serno（第一个哈希）＆＃34;的哈希名称。它根据serno和parent_serno对它们进行分组。

你能告诉我我做错了什么吗？

 var dataBase = [{"serno": 1, "parent_serno": 0, "name": "Home"},
            {"serno": 2, "parent_serno": 0, "name": "Search"},
                {"serno": 10, "parent_serno": 2, "name": "Search Payment"},
            {"serno": 11, "parent_serno": 2, "name": "Problematic Search Payment"},
            {"serno": 12, "parent_serno": 2, "name": "Cash Error"},
            {"serno": 13, "parent_serno": 2, "name": "Payment Note"},
            {"serno": 89, "parent_serno": 2, "name": "Search Payment By Category"},
            {"serno": 131, "parent_serno": 2, "name": "Search Payment New"},
            {"serno": 3, "parent_serno": 0, "name": "User Mangement"},
            {"serno": 4, "parent_serno": 0, "name": "Service Provider"},
            {"serno": 5, "parent_serno": 0, "name": "General"},
            {"serno": 88, "parent_serno": 5, "name": "Balance and Financial"},
            {"serno": 14, "parent_serno": 5, "name": "My Subagents"},
            {"serno": 15, "parent_serno": 5, "name": "My Providers"},
            {"serno": 16, "parent_serno": 5, "name": "My Dealers"},
            {"serno": 17, "parent_serno": 5, "name": "My Wallets"},
            {"serno": 19, "parent_serno": 5, "name": "Accounts"},
            {"serno": 45, "parent_serno": 19, "name": "Bank Accounts"},
            {"serno": 46, "parent_serno": 19, "name": "Transfers"},
            {"serno": 0, "parent_serno": 5, "name": "My Statements"},
            {"serno": 47, "parent_serno": 20, "name": "My Terminals"}];

        var funkcia = function(parent) {
            for (var i=0, i < dataBase.length, i++){
                if (dataBase[i].parent_serno == parent){
                    document.write(dataBase[i].name);
                    parent = dataBase[i].serno;
                    funkcia(parent);
                };
                  };
                    };

funkcia(0);

Answer 1

 parent = dataBase[i].serno;
 funkcia(parent);

这是你的问题。你正在改变parent变量，但是让for循环继续运行，现在正在搜索错误的parent。

要么使用其他变量：

function funkcia(parent) {
    for (var i=0; i < dataBase.length; i++){
        if (dataBase[i].parent_serno == parent){
            document.write(dataBase[i].name);
            var new_parent = dataBase[i].serno;
            funkcia(new_parent);
        }
    }
}

或根本没有：

function funkcia(parent) {
    for (var i=0; i < dataBase.length; i++){
        if (dataBase[i].parent_serno == parent){
            document.write(dataBase[i].name);
            funkcia(dataBase[i].serno);
        }
    }
}

Javascript中的递归循环

1 个答案: