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Just another update

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Ingy döt Net 2015-02-20 00:35:01 -05:00
parent a25938f123
commit 00a190b0a6
6591 changed files with 94363 additions and 23227 deletions
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15
Task/URL-decoding/Haskell/url-decoding.hs Normal file
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import qualified Data.Char as Char
urlDecode :: String -> Maybe String
urlDecode [] = Just []
urlDecode ('%':xs) =
case xs of
(a:b:xss) ->
urlDecode xss
>>= return . ((Char.chr . read $ "0x" ++ [a,b]) :)
_ -> Nothing
urlDecode ('+':xs) = urlDecode xs >>= return . (' ' :)
urlDecode (x:xs) = urlDecode xs >>= return . (x :)
main :: IO ()
main = putStrLn . maybe "Bad decode" id $ urlDecode "http%3A%2F%2Ffoo%20bar%2F"