在 Javascript 中使用枚举
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Using Enums In Javascript
提问by user1219627
I have the following ENUM in my Javascript:
我的 Javascript 中有以下 ENUM：
var letters = { "A": 1, "B": 2, "C": 3.....}
And to use this I know use:
要使用它，我知道使用：
letters.A
But I was wondering if there was a way that i could replace A with a variable. I have tried something like
但是我想知道是否有一种方法可以用变量替换 A 。我试过类似的东西
var input = "B";
letters.input;
but this does not work.
但这不起作用。
Any suggestions?
有什么建议？
Thanks
谢谢
回答by Paul
You can use the Bracket Notation Member Operator:
您可以使用括号符号成员运算符：
letters[input];
It expects a string, so letters.B == letters["B"], and:
它需要一个字符串，所以letters.B == letters["B"]，并且：
var letters = { "A": 1, "B": 2, "C": 3 },
input = "B";
console.log(letters[input]);
outputs 2.
输出2。
