how to create an object from number enum in typescript?

Question

I have one enum that I would like to do reverse mapping so eventually I have one object with key as enum.value and value as enum's key I can hardcode all key-value pair but how can I write something more dynamic?

export declare enum SAMPLE {
  AIR = 0,
  EARTH = 1,
  WATER = 2
}

REVERSESAMPLE {
SAMPLE.AIR = 'Air',
SAMPLE.EARTH = 'Earth',
SAMPLE.WATER = 'Water',

}

Numeric enums already have a reverse mapping, does that not suffice? If not, please consider editing the question to make it the issue explicit. Also note though that "AIR" and "Air" are different strings; is that case difference intentional or a typo? Are you intending to declare the enum instead of actually emitting it? If so, how does it work? — jcalz
– jcalz, Commented Mar 10, 2022 at 21:25
yes, it is intentional or different case and declare. so I have to to SAMPLE enum from other file and the based on the type value from the object {type: 1} I have i need to return the string 'Earth'. however for some reason the i get undefined from SAMPLE[Object.type] — jacobcan118
– jacobcan118, Commented Mar 10, 2022 at 23:09
I’m sorry, I really don’t understand that at all 😞. Your sentences don’t make sense to me. Could you try to rephrase? I imagine that you might not be a native speaker of English, but I can’t help if I don’t understand you. — jcalz
– jcalz, Commented Mar 10, 2022 at 23:36

vitaliyirtlach · Accepted Answer · 2022-03-10 21:28:41Z

1

You don't need to do this. Sample[0] => "Air" And Sample.Air => 0

answered Mar 10, 2022 at 21:28

vitaliyirtlach

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