How do you detect if a list has exactly 3 items in Haskell?

Posted by kunjaan on Stack Overflow See other posts from Stack Overflow or by kunjaan
Published on 2010-03-19T21:05:55Z Indexed on 2010/03/19 21:11 UTC
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-- test if a list containts exactly three characters
test :: [Char] -> Bool
test xs   | [_ , _ , _] = True
          | otherwise = False

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