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groupBy Missing #437

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schnecki opened this issue Nov 3, 2017 · 1 comment
Open

groupBy Missing #437

schnecki opened this issue Nov 3, 2017 · 1 comment
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C - collection collection stuff X - help wanted Need help from someone

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@schnecki
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schnecki commented Nov 3, 2017 •
edited

Hi,
I'm missing the groupBy function for lists/sequentials. Is there a reason why it's not there?
@schnecki
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schnecki commented Nov 3, 2017 •
edited

And why is there no instance for Foldable on NonEmpty?

instance Foldable c => Foldable (NonEmpty c) where
  foldl' f a (NonEmpty xs) = foldl' f a xs
  foldr' f a (NonEmpty xs) = foldr' f a xs

Then groupBy could be implemented. But the current NonEmpty is quite unusable.

@vincenthz vincenthz added C - collection collection stuff X - help wanted Need help from someone labels Nov 11, 2017
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