Just another update

Task/URL-encoding/Haskell/url-encoding.hs

@@ -0,0 +1,14 @@
+import qualified Data.Char as Char
+import Text.Printf
+
+encode :: Char -> String
+encode c
+  | c == ' ' = "+"
+  | Char.isAlphaNum c || c `elem` "-._~" = [c]
+  | otherwise = printf "%%%02X" c
+
+urlEncode :: String -> String
+urlEncode = concatMap encode
+
+main :: IO ()
+main = putStrLn $ urlEncode "http://foo bar/"