javascript - 使用 Javascript 迭代 JSON 数据

Question

我正在开发一个项目，其中有一系列只能使用预定义次数的密码。现在，我有两个 JS 函数进行验证，还有一个外部 JSON 文件包含要验证的数据。我的 JS 函数目前只能验证一种可能的密码。不知道如何扩展这些函数以迭代完整的 JSON 文件。欣赏任何方向。

谢谢

    function validateCode() {            
        var txtCode = document.getElementById("INPUT_PASSCODE");
        var results = txtCode.value.trim() != "" ? getRemainingCode(txtCode.value) : -1;

        if (results == 0) {
            alert('This code is no longer elegible');
            txtCode.value = '';
            txtCode.focus();

            return false;
        }
        else if (txtCode.value.trim() != "" && results == -1) {
            alert('Invalid code used');
            txtCode.value = '';
            txtCode.focus();

            return false;
        }

        return true;
    }

    function getRemainingCode(code) {
        var count = -1; //Not a valid code

        jQuery.ajax({
            url: '../codeCheck.aspx?Code=' + code + '&formhash=dfsgdfg',
            dataType: 'json',
            success: function (result) {
                count = result.REMAINING;

                if (isNaN(count))
                    count = -1;
            },

            async: false
        });

        return count;

    }

JSON 数据

{
   "Passcode_1":{
      "ID":"sdfg3456",
      "USED":"0",
      "REMAINING":"1",
      "TIMESTAMP":"4/30/2014 3:16:53 PM"
   },
   "Passcode_2":{
      "ID":"jkhl765",
      "USED":"0",
      "REMAINING":"1",
      "TIMESTAMP":"4/30/2014 3:16:53 PM"
   },
   "Passcode_3":{
      "ID":"cvbn435",
      "USED":"0",
      "REMAINING":"1",
      "TIMESTAMP":"4/30/2014 3:16:53 PM"
   },
   "Passcode_4":{
      "ID":"345fgh",
      "USED":"0",
      "REMAINING":"1",
      "TIMESTAMP":"4/30/2014 3:16:53 PM"
   },
   "Passcode_5":{
      "ID":"5hrdd54",
      "USED":"0",
      "REMAINING":"1",
      "TIMESTAMP":"4/30/2014 3:16:53 PM"
   }
}

Answer 1

要访问对象，您需要通过 for in 循环遍历它。

for(var i in result)
{
    var count = result[i].REMAINING;
}