Hi John, long `endsWith` short = (reverse short) `isPrefixOf` (reverse long)
would be a possibility (and might be slightly more efficient). And this argument order is much better according to the principle of least surprise (a `endsWith` b is naturally interpreted so that b is the suffix). Regarding your "map ..." problem: map (`endsWith` "t") ["cat","dog"] takes two keystrokes more, but preserves meaning in infix application. Cheers, Daniel Am Samstag, 21. Oktober 2006 17:19 schrieb John Ky: > Hello, > > I have this function here: > > endsWith :: Eq a => [a] -> [a] -> Bool > > endsWith suffix list > > > > | lengthDifference < 0 = False > > | otherwise = (drop lengthDifference list) == suffix > > > > where lengthDifference = (length list) - (length suffix) > > Would this be the preferred function argument order? Or is the reverse > (ie. endsWith list suffix) better? > > I like being able to say "abc" `endsWith` "c", but I also like to be able > to say map (endsWith 't') ["cat", dog"] but I can't have both. > > By the way, is there a better way to write this function to be clearer and > more efficient? > > Thanks > > -John _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
