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@shigemk2 shigemk2/length.hs
Created Feb 18, 2015

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import Data.List
numUniques :: (Eq a) => [a] -> Int
-- ポイントフリースタイルが登場しています
numUniques = length . nub
numUniques' x = (length . nub) x
main = do
print $ numUniques [3,3,3,4,5] -- 3
print $ numUniques' [3,3,3,4,5] -- 3
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