Getting the Key of a Key Value Pair

Question

I have a key value pair array in js

var tabList = {0:'#description', 1:'#media', 2:'#attributes', 3:'#calendar', 4:'#pricing'}

I'm using the keys to get the values in my code

ie. tabList[2] returns #attributes

I thought I could do the same in reverse to get the key

tabList[#media] and have it return 1

But this doesn't work

How can I fetch the key with only the value as input?

@csmckelvey - that solution uses Underscore. May not apply here. — Randy Casburn, May 10 '18 at 23:43
@RandyCasburn The "accepted" solution (which is not even the top upvoted) does, but not all of them do. — takendarkk, May 10 '18 at 23:43
@csmckelvey - yeah - there are a bazillion of them. OP should search. — Randy Casburn, May 10 '18 at 23:45
Is there a reason you're not storing this in an array? You could then just use `findIndex()` — Mark, May 10 '18 at 23:45
See MDN about it: https://developer.mozilla.org/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/Object/keys — Giovanni Klein Campigoto, May 10 '18 at 23:46

score 1 · Answer 1 · answered May 10 '18 at 23:45

There are plenty of solutions here Swap key with value JSON

I will flip key with values 1st

var tabList = {0:'#description', 1:'#media', 2:'#attributes', 3:'#calendar', 4:'#pricing'}
let flipped=Object.assign({}, ...Object.entries(tabList).map(([k,v]) => ({ [v]: k })))
console.log(flipped);
console.log(flipped['#description']);

Getting the Key of a Key Value Pair

1 Answers1