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Add function to also combine errors #27

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ad-si opened this issue Sep 1, 2021 · 1 comment

ad-si commented Sep 1, 2021

There already exists:

combine : List (Result x a) -> Result x (List a)

But I'm missing a

combineErr : List (Result x a) -> Result (List x) (List a)

Should this be added?

lue-bird commented Dec 5, 2021 •

edited

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ResultME.combineList from the-sett's error-handling is similar

type alias ResultME err a =
    Result (Nonempty err) a

combineList : List (ResultME err a) -> ResultME err (List a)

The error list in the combined Result is Nonempty
also the input results are Results with Nonempty errors

You could throw a PR in there with a version fromCombinedList (short for List.map fromResult >> combineList)

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