On Mon, Jan 2, 2012 at 3:14 PM, max <m...@mtw.ru> wrote:
> I want to write a function whose behavior is as follows:
>
> foo "string1\nstring2\r\nstring3\nstring4" = ["string1",
> "string2\r\nstring3", "string4"]
>
> Note the sequence "\r\n", which is ignored. How can I do this?
Here's a simple way (may not be the most efficient) -
import Data.List (isSuffixOf)
split = reverse . foldl f [] . lines
where
f [] w = [w]
f (x:xs) w = if "\r" `isSuffixOf` x then ((x++"\n"++w):xs) else (w:x:xs)
Testing -
ghci> split "ab\r\ncd\nefgh\nhijk"
["ab\r\ncd","efgh","hijk"]
-- Anupam
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