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-rw-r--r--challenge-239/deadmarshal/haskell/ch2.hs14
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diff --git a/challenge-239/deadmarshal/haskell/ch2.hs b/challenge-239/deadmarshal/haskell/ch2.hs
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+module Ch2 where
+
+consistentStrings :: [String] -> String -> Int
+consistentStrings xs allowed =
+ length $ filter (==True) $ map (\s -> cond s) xs
+ where
+ cond s = all (\c -> elem c allowed) s
+
+main :: IO ()
+main = do
+ print $ consistentStrings ["ad","bd","aaab","baa","badab"] "ab"
+ print $ consistentStrings ["a","b","c","ab","ac","bc","abc"] "abc"
+ print $ consistentStrings ["cc","acd","b","ba","bac","bad","ac","d"] "cad"
+