在Javascript中使用变量的字符串作为JSON的属性名称？ [英] Using string from variable as property name for JSON in Javascript?

问题描述

所以我通过AJAX抓取JSON，但需要重新配置它。部分原因是使用变量中包含的字符串作为嵌套对象的属性名称。

So I'm grabbing a JSON via AJAX, but need to re-configure it. Part of that means using a string contained in a variable as the property name of a nested object.

但是Javascript不允许这样做。它将变量视为文字字符串，而不是读取值。

But Javascript doesn't allow this. It treats variables as literal strings, instead of reading the value.

这是一个片段：

var pvm.exerciseList = [];

$.get('folder_get.php', function(data){
    var theList = $.parseJSON(data);
    $.each(theList, function(parentFolder, files) {
        var fileList = [];
        $.each(files, function(url, name) {
            thisGuy.push({fileURL: url, fileName: name});
        });
        pvm.exerciseList.push({parentFolder: fileList});
    });
});

无论如何都有这个吗？我需要提取parentFolder中包含的字符串。现在，JS只是按字面解释它。

Is there anyway around this? I need to extract the string contained in "parentFolder." Right now, JS is just interpreting it literally.

推荐答案

使用 [] 将变量解析为属性名称的语法。这可能需要中间人 {} ：

Use the [] syntax to resolve a variable as a property name. This might require an intermediary {}:

$.get('folder_get.php', function(data){
    var theList = $.parseJSON(data);
    $.each(theList, function(parentFolder, files) {
        var fileList = [];
        $.each(files, function(url, name) {
            thisGuy.push({fileURL: url, fileName: name});
        });

        // Make an object    
        var tmpObj = {};
        // And give it a property with the current value of parentFolder
        tmpObj[parentFolder] = fileList;
        // Then push it onto the array
        pvm.exerciseList.push(tmpObj);
    });
});

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