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4b done

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Aaro Koivukangas
2025-12-22 21:40:56 +02:00
parent 465a2b4803
commit 9545dd72e9
1 changed files with 3 additions and 1 deletions
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exercises/Set4b.hs
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@@ -124,5 +124,7 @@ headHelper x (Just a) = Just x
myLast :: [a] -> Maybe a
myLast xs = foldr lastHelper Nothing xs
lastHelper = todo
lastHelper x acc = case acc of
Nothing -> Just x
Just a -> Just a