her.esy.fun/src/posts/0010-Haskell-Now/evenSum_v3.hs

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2019-12-25 15:35:56 +00:00
-- Version 3
evenSum l = accumSum 0 l
where
accumSum n [] = n
accumSum n (x:xs) =
if even x
then accumSum (n+x) xs
else accumSum n xs