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tokiwoousaka/work.hs

Created April 12, 2016 10:32
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work.hs
module Main where
import Safe
import Control.Applicative
main :: IO ()
main = do
print $ sample ([] :: [Int])
print $ sample [1]
print $ sample [1,2]
print $ sample [1,2,3,4,5]
sample :: Show a => [a] -> Maybe [String]
sample xs = fmap (map hoge) $ zip <$> Just xs <*> tailMay xs
hoge :: (Show a, Show b) => (a, b) -> String
hoge (x, y) = "<" ++ show x ++ ", " ++ show y ++ ">"
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