访问元素的json数组

Question

此处的演示工作： http : //jsfiddle.net/8Q4Lf/3/

我正在使用json检索数组并将其存储在隐藏的input ：

$.post("http://"+ document.domain + baseUrl + "/tickets/getCategoryDepartmentRelation/",
    function(dat){
        $('#departmentsByCategory_array').val(JSON.stringify(dat));         
});

调用返回此值：

{
    "Investigation Request": [
        "Client server",
        "Interface",
        "Engine"
    ],
    "Configure Planning": [
        "Interface",
        "Engine"
    ],
    "Bug Report": [
        "Client server",
        "Interface",
        "Engine",
        "Database"
    ],
    "Development Request": [
        "Interface",
        "Dev Management",
        "Database",
        "Client server",
        "Engine"
    ],
    "Suggestion Box": [
        "Dev Management"
    ],
    "Post Site Feedback": [
        "Web"
    ]
}

该数组的json表示形式：

Array
(
    [Investigation Request] => Array
        (
            [0] => Client server
            [1] => Interface
            [2] => Engine
        )

    [Configure Planning] => Array
        (
            [0] => Interface
            [1] => Engine
        )

    [Bug Report] => Array
        (
            [0] => Client server
            [1] => Interface
            [2] => Engine
            [3] => Database
        )

    [Development Request] => Array
        (
            [0] => Interface
            [1] => Dev Management
            [2] => Database
            [3] => Client server
            [4] => Engine
        )

    [Suggestion Box] => Array
        (
            [0] => Dev Management
        )

    [Post Site Feedback] => Array
        (
            [0] => Web
        )

)

这将用以下数据填充input ：

<input type="hidden" name="demo" value="{&quot;Investigation Request&quot;:[&quot;Client server&quot;,&quot;Interface&quot;,&quot;Engine&quot;],&quot;Configure Planning&quot;:[&quot;Interface&quot;,&quot;Engine&quot;],&quot; Bug Report&quot;:[&quot;Client server&quot;,&quot;Interface&quot;,&quot;Engine&quot;,&quot;Database&quot;],&quot; Development Request&quot;:[&quot;Interface&quot;,&quot;Dev Management&quot;,&quot;Database&quot;,&quot;Client server&quot;,&quot;Engine&quot;],&quot;Suggestion Box&quot;:[&quot;Dev Management&quot;],&quot;Ticket Site Feedback&quot;:[&quot;Web&quot;]}" id="departmentsByCategory_array">

我可以得到完整的数组：

$('#departmentsByCategory_array').val();

但是我试图只检索一个元素的值，例如“ Configure Planning” 。

如何在Javascript或jQuery中使用这些值进行播放？ （循环比较）

Answer 1

我发现了问题。 您将在json表示中返回一个额外的空间，因此您要访问的是" Bug Report" ，而不是 "Bug Report" 。

alert(data[' Bug Report']);

此处修改小提琴： http : //jsfiddle.net/8Q4Lf/2/

关键的" Development Request" 。

alert(data[' Development Request']);

Answer 2

var data = JSON.parse($('#departmentsByCategory_array').val());
data['Configure Planning']; //returns Configure Planning array