はじめてのHaskell(7)
練習問題
countbyte.hs
main = do cs <- getContents print $ countByte cs countByte cs = length cs
countwords.hs
main = do cs <- getContents print $ countWords cs countWords cs = length $ words cs
swap.hs
main = do cs <- getContents putStr $ swap cs swap :: String -> String swap cs = concatMap expandA cs expandA :: Char -> String expandA 'a' = ['A'] expandA 'A' = ['a'] expandA c = [c]
sort.hs
import System import List main = do cs <- getContents putStr $ unlines $ sort $ lines cs
uniq.hs
import List main = do cs <- getContents putStr $ unlines $ remdup $ group $ sort $ lines cs where remdup :: [[a]] -> [a] remdup [] = [] remdup (x:xs) = head x :remdup xs
uniq2.hs
import List main = do cs <- getContents putStr $ unlines $ map head $ group $ lines cs
