Javascript-使用字符串作为对象引用 [英] Javascript - use string as object reference

问题描述

如果我有一堆对象，并且在这些对象中包含字符串"id"(与对象名称相同)，该如何使用该字符串来引用该对象?

If I have a bunch of objects, and within these objects is the string "id" (which is the same as the object name) how can I use this string to reference the object?

示例:

//These objects are tests - note the id's are the same as the object name

var test1 = {
    id : "test1",
    data : "Test 1 test 1 test 1"
}

var test2 = {
    id : "test2",
    data : "Test 2 test 2 test 2"
}


/* ----- My Function   ----- */

var myObj = null;

function setMyObj(obj){
   myObj = obj;
}

setMyObj(test1);

/* ----- My Function   ----- */

现在，如果我拨打以下电话:

Now, if I call the following:

myObj.id;

结果为"test1"(字符串). 如果要使用它从test1中获取数据，该怎么办?

The Result is "test1" (a string). If I want to use this to get the data from test1, how would I do so?

"myObj.id".data
[myObj.id].data

^^^

这些不起作用！

干杯， 丰富

推荐答案

如果您的变量是在全局范围内定义的，则可以使用以下方法

If your variables are defined on a global scope, the following works

window[ myObj.id ].data

如果您处于函数范围内，则事情会变得困难得多.然后，最简单的方法是在窗口上的特定命名空间中定义对象，然后检索与上述代码类似的对象.

If you are in a function's scope, things get a lot harder. Easiest way then is to define your objects in a specific namespace on window and retrieve the objects similar to the above code.

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