如何在JavaScript中使变量可按名称作为字符串寻址? [英] How to make a variable addressable by name as string in JavaScript?

问题描述

有没有一种方法可以将变量名称转换为javascript中的字符串?具体来说:

Is there a way to convert variable names to strings in javascript? To be more specific:

var a = 1, b = 2, c = 'hello';
var array = [a, b, c];

现在在遍历数组的某个时候，我需要获取变量名称(而不是它们的值)作为字符串-即为'a'或'b'或'c'.而且我真的需要它是一个字符串，以便它是可写的.我该怎么办?

Now at some point as I go through the array, I need to get variable names (instead of their values) as strings - that would be 'a' or 'b' or 'c'. And I really need it to be a string so it is writeable. How can I do that?

推荐答案

使用Javascript对象文字:

Use a Javascript object literal:

var obj = {
    a: 1,
    b: 2,
    c: 'hello'
};

然后您可以像这样遍历它:

You can then traverse it like this:

for (var key in obj){
    console.log(key, obj[key]);
}

然后访问对象的属性，如下所示:

And access properties on the object like this:

console.log(obj.a, obj.c);

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