On 28/09/2011, at 17:11, Evan Laforge wrote:
I don't think that's a realistic attitude at the moment. tailDropWhile was one of the first things I put in my personal library, along with various string functions like strip, split, and join, and I still use them all the time on strings. Certainly the performance sensitive parts of code use ByteString or Text, but the vast majority of strings are not in critical sections or are quite small and using Text everywhere would be awkward syntactically for no measurable gain. Also a lot of libraries only accept and produce Strings.
If performance isn't a concern, what's wrong with using reverse . dropWhile f . reverse? Another easy definition is this: foldr (\x xs -> if null xs && f x then [] else x:xs) [] Roman