I have a REST API that returns a json document, one field is numeric, mode. The values of the mode field are limited 0-3, they represent different states. To me this looks like an enum from other languages. What is the recommend way to represent this data in enum? I was thinking a Union type would b…

This is a great way to model this. For decoding you would map each number to the value that matches, and fail when an unexpected value is reached. Possibly something like import Json.Decode type Mode = Off | Heat | Cool | Auto decode : Json.Decode.Decoder Mode decode = Json.De…

Best way to represent an enum

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rupert November 16, 2021, 10:30am 4

Some different ways of doing Enums in Elm were discussed here:

Topic		Replies	Views
Inspiration: Cool decoder type from TypeScript Request Feedback	6	1896	August 31, 2019
How to do enums in Elm Learn	11	8183	June 13, 2018
Tips on JSON decoding Learn	4	659	November 14, 2020
Json.Decode into Union Type without an identifier Learn	5	272	September 28, 2023
JSON Decode to Opaque Type Request Feedback	9	1075	March 4, 2021

Best way to represent an enum

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