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dailyprogrammer #279 solution attempt in haskell
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| import Data.List | |
| import Data.List.Utils -- cabal install missingH | |
| -- solution.hs | |
| -- reflow and justify input text to 40-char width. | |
| -- redir the output to a formatting function, so | |
| -- results can actually be seen. e.g.: | |
| -- putStrLn(prettify "sample text") | |
| -- curryfying function | |
| prettify :: [Char] -> [Char] | |
| prettify [] = [] | |
| prettify a = concat(justify(reflow(words a))) | |
| -- reflow word list function | |
| reflow:: [[Char]] -> [[Char]] | |
| reflow a@(_:[]) = a | |
| reflow a@(x:y:_) | |
| | length(x ++ " " ++ y) <= 40 = reflow((x ++ " " ++ y):tail(tail a)) | |
| | otherwise = (x ++ "\n"):[] ++ reflow(tail a) | |
| -- justify line list function | |
| justify :: [[Char]] -> [[Char]] | |
| justify a@(_:[]) = a | |
| justify a@(x:_) | |
| | (length(findIndices(== ' ') x) + (length x) <= 40) | |
| = justify((replace " " " " x):(tail a)) | |
| | otherwise = x:[] ++ justify(tail a) |
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