simonmarhaskell:
I guess the problem with the splitWith thing is that it's a slippery path that leads right up to full-on parsers.
Exactly, and this is why we didn't reach a concensus last time.
Would someone like to make a concrete proposal (with code!) for 2-3 functions we could reasonably add to Data.List?
No parsers! I vote for this, currently implemented in Data.ByteString: -- | split on characters split :: Char -> String -> [String] -- | split on predicate * splitBy :: (Char -> Bool) -> String -> [String] and -- | split on a string tokens :: String -> String -> [String] Question over whether it should be: splitBy (=='a') "aabbaca" == ["","","bb","c",""] or splitBy (=='a') "aabbaca" == ["bb","c"] I argue the second form is what people usually want. -- Don