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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
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Task/Nested-templated-data/Haskell/nested-templated-data-5.hs Normal file
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unusedIndices :: (Foldable t, Eq i) => [(i,a)] -> t i -> [i]
unusedIndices d = foldMap unused
where unused i = maybe (pure i) (pure []) $ lookup i d
unusedData :: (Foldable t, Eq i) => [(i, a)] -> t i -> [(i,a)]
unusedData = foldr delete
where delete i = filter ((i /= ) . fst)