diff options
Diffstat (limited to 'challenge-115')
| -rwxr-xr-x | challenge-115/stuart-little/haskell/ch-1.hs | 16 | ||||
| -rwxr-xr-x | challenge-115/stuart-little/haskell/ch-2.hs | 14 |
2 files changed, 30 insertions, 0 deletions
diff --git a/challenge-115/stuart-little/haskell/ch-1.hs b/challenge-115/stuart-little/haskell/ch-1.hs new file mode 100755 index 0000000000..5253ee7b01 --- /dev/null +++ b/challenge-115/stuart-little/haskell/ch-1.hs @@ -0,0 +1,16 @@ +#!/usr/bin/env runghc + +-- run <script> <space-separated strings> + +import Data.List ((\\)) +import System.Environment (getArgs) + +canChain :: [String] -> Char -> Char -> Bool +canChain ws s e + |null ws = False + |length ws == 1 = ((head.head $ ws) == s) && ((last.head $ ws) == e) + |otherwise = any (\w -> canChain (ws \\ [w]) (last w) e) (filter (\w -> head w == s) ws) + +main = do + ws <- getArgs + putStrLn . show . fromEnum $ (canChain (tail ws) (last . head $ ws) (head . head $ ws)) diff --git a/challenge-115/stuart-little/haskell/ch-2.hs b/challenge-115/stuart-little/haskell/ch-2.hs new file mode 100755 index 0000000000..684e4f025c --- /dev/null +++ b/challenge-115/stuart-little/haskell/ch-2.hs @@ -0,0 +1,14 @@ +#!/usr/bin/env runghc + +-- run <script> <space-separated digits> + +import Data.List (intercalate,sort) +import System.Environment (getArgs) +import Text.RegexPR (subRegexPR) + +lgstEven :: [String] -> String +lgstEven digs = if even.(read::String->Int) $ res then res else "No even digits.." where + res = (subRegexPR "(.)([13579]*)$" "\\2\\1").(intercalate "").reverse.sort $ digs + +main :: IO () +main = getArgs >>= putStrLn.lgstEven |
