Question

我想获取li ID属性（将是userID）的值，并将其用作字符串的一部分，我最终将其用作变量名称的一部分。我将使用此变量名来创建一个数组。

我理解基础知识，但似乎无法找到jQuery / javascript的正确组合来实现这种魔力。

jQuery('#user-list li').click(function() {
    var userID = jQuery(this).attr("id");

    // i want to add the word array to the end of userID
    var theVariableName = userID + "Array";

    // I want to use this variable to create an array
    var theVariableName = new Array();

    // I want to continue to use the name throughout my document
    theVariableName.push({startTime: 7, endTime: 10});

    alert(theVariableName[0].startTime);

});

Answer 1

使用Object来保存各种用户数组：

window.userData = {};

$(...).click(function() {
    // ...
    window.userData[userID] = [];
    window.userData[userID].push({startTime:7, endTime:10});

    alert(window.userData[userID][0].startTime);
}

您可能不希望将userData对象存储在全局命名空间中;为了防止意外的名称冲突，你至少应该将它放在你自己的命名空间中。

Answer 2

您可以将变量存储在全局window对象中：

jQuery('#user-list li').click(function() {
    var userID = jQuery(this).attr("id");

    // i want to add the word array to the end of userID
    var theVariableName = userID + "Array";

    // I want to use this variable to create an array
    window[theVariableName] = new Array();

    // I want to continue to use the name throughout my document
    window[theVariableName].push({startTime: 7, endTime: 10});

    alert(window[theVariableName][0].startTime);
});

实际上，未在闭包中声明的每个var x声明的变量x都将驻留在全局对象中。但是，我建议您使用另一个全局对象，例如userStorageObject或类似的东西：

var userStorageObject = {};
jQuery('#user-list li').click(function() {
    var userID = jQuery(this).attr("id");

    // i want to add the word array to the end of userID
    var theVariableName = userID + "Array";

    // I want to use this variable to create an array
    userStorageObject[theVariableName] = new Array();

    // I want to continue to use the name throughout my document
    userStorageObject[theVariableName].push({startTime: 7, endTime: 10});

    alert(userStorageObject[theVariableName][0].startTime);
});

它在这里工作：http://jsfiddle.net/bingjie2680/NnnRk/

Answer 3

你可以这样做..

var variable = "Array";
window[id+variable] = "value";

Answer 4

尝试eval：

var theVariableName = userID + "Array";
eval(theVariableName+"= new Array()");

动态jQuery变量名称

4 个答案: