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CDE

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Ingy döt Net 2013-04-10 16:57:12 -07:00
parent 518da4a923
commit 764da6cbbb
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Task/Empty-string/Haskell/empty-string.hs Normal file
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import Control.Monad
-- In Haskell strings are just lists (of characters), so we can use the function
-- 'null', which applies to all lists. We don't want to use the length, since
-- Haskell allows infinite lists.
main = do
let s = ""
when (null s) (putStrLn "Empty.")
when (not $ null s) (putStrLn "Not empty.")