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
How to do enums in Elm Learn	11	8711	June 13, 2018
Enums, several different ways Request Feedback	5	926	November 9, 2019
Enum helper package? Request Feedback	15	1558	April 15, 2019
A tool for autogenerating code and en/de-coders of enum-like types Show and Tell	1	692	January 18, 2019
Mapping Tagged Union types to other languages? Learn	26	4703	November 24, 2018

Best way to represent an enum

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