Using Enums In Javascript

Question

I have the following ENUM in my Javascript:

var letters = { "A": 1, "B": 2, "C": 3.....} 

And to use this I know use:

letters.A 

But I was wondering if there was a way that i could replace A with a variable. I have tried something like

var input = "B"; letters.input; 

but this does not work.

Any suggestions?

Thanks

Answer 1

You can use the Bracket Notation Member Operator:

letters[input]; 

It expects a string, so letters.B == letters["B"], and:

var letters = { "A": 1, "B": 2, "C": 3 }, input = "B"; console.log(letters[input]); 

outputs 2.