javascript - JavaScript 中的递归循环

Question

我尝试使用递归循环将某些属性写入 html，但无法使代码工作:(

我有哈希数组，正如您在 Json 中看到的那样。具有以下属性:serno - 序列号、parent_serno - 父级的序列号、name - 属性名称。我想首先写下每个具有“parent_serno == 0”的 hash.name，然后在每个之后我想写下具有“parent_serno = serno(第一个散列)”的散列名称，这是根据将它们分组serno 和parent_serno。

你们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。您正在更改 parent 变量，但随后让 for 循环继续运行，现在正在搜索错误的 parent。

要么使用不同的变量:

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);
        }
    }
}

或者根本没有:

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);
        }
    }
}