动态变量在javascript中命名 [英] Dynamic variables names in javascript

问题描述

我有变量：

var variableDynamic = 1;
// or    
var variableDynamic = 1 + i++;

有没有办法用它来创建动态变量名，例如：

Is there any way to use that to create dynamic variable names, for example something like this:

var variableName + variableDynamic = {};
// or
var (variableName + variableDynamic) = {};

我知道上面写的是荒谬的，但这是为了解释这个想法。有可能吗？

I know what I wrote above is absurd, but this is to explain the idea. Is it possible?

好的，每次用户点击添加时我想要创建元素（上传表单）新的文件组，一切正常，除了我用它的插件需要特殊的变量为每个上传表单触发上传按钮（.uploadStoredFiles（）;）。

Ok, what I want to do to create element (upload form) every time user click on add new file group, everything is working fine except that plugin that I use for it need special variable for each upload form to trigger upload button (.uploadStoredFiles();).

这是我做的粗略代码：

    $('#addOneMoreFileOrGroup').on('click', function(){

    var latestFileUploaderId = parseInt($('.well-large .file-uploader').last().attr('id').split('-')[2]) + 1;

    $('.well-large .control-group:last').after('<div class="control-group deal-type-online">  \
        <label class="control-label">File / File Group Title:</label> \
        <div class="controls"> \
            <input class="span4 file-title" type="text"> \
            <span class="question label label-warning" data-title="File / Group Name:" data-content="Name for your file or group of related files (for example your brand logotype in different file formats)." data-original-title="">?</span> \
            <div id="file-uploader-' + latestFileUploaderId + '" class="file-uploader"></div> \
        </div> \
    </div>');

    var HERE_I_NEED_DYNAMIC_VAR = new qq.FileUploader({
        element: document.getElementById('file-uploader-' + latestFileUploaderId + ''),
        action: 'do-nothing.htm',
        autoUpload: false,
        debug: true,
        uploadButtonText: '<i class="icon icon-plus"></i> Select Files...',
        onSubmit: function() {

            $('#file-uploader-' + latestFileUploaderId + ' .qq-uploader').after('<button id="file-uploader-trigger-' + latestFileUploaderId + '" class="btn btn-primary"><i class="icon-upload icon-white"></i> Upload now</button>');

            $('#file-uploader-trigger-' + latestFileUploaderId + '').on('click', function() {

                if($(this).parent().parent().parent().parent().find('.file-title').val() !== '') {
                    HERE_I_NEED_DYNAMIC_VAR.uploadStoredFiles();
                } else {

                    $(this).parent().parent().parent().addClass('error');

                }

            });

        }
    });

});

}

推荐答案

在JavaScript中，对象的属性可以通过 obj.prop 或 obj ['prop'] 进行访问。

In JavaScript, an object's properties can be access either by obj.prop or obj['prop'].

在全局范围内，所有变量都是窗口属性的子项。所以你将能够做到：

In the global scope, all variables are children of the window property. So you'll be able to do:

var variableDynamic = 'Test';
window['variableName' + variableDynamic] = 'your value';

查看这个小提琴。

但是，如果你想将这个变量的范围限制为一个函数，你必须定义一个父对象并使用它来代替窗口。

However, if you'd like to limit the scope of this variable to a function, you would have to define a parent object and use this in place of window.

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