On Sat, Jan 1, 2011 at 10:06 PM, Jesse Schalken <jesseschal...@gmail.com>wrote:
> > > On Sat, Jan 1, 2011 at 8:39 PM, Henning Thielemann < > lemm...@henning-thielemann.de> wrote: > >> >> On Sat, 1 Jan 2011, Jesse Schalken wrote: >> >> On Sat, Jan 1, 2011 at 8:54 AM, Felipe Almeida Lessa < >>> felipe.le...@gmail.com> wrote: >>> >>> > No definition for last works with infinite lists =). >>> >>> >>> Unless you make the result nullable, of course. >>> >>> maybeLast :: [a] -> Maybe a >>> >>> >>> maybeLast [] = Nothing >>> >>> maybeLast [x] = Just x >>> maybeLast (_:xs) = maybeLast xs >>> >> >> How would this work for infinite lists? >> >> > If your list is infinitely big, then reaching its end will take infinitely > long. ;) > > It will loop forever, just like `last [1...]` does. > > Oh, sorry. My participation in this thread can be safely ignored. I read "No definition of last works for infinite lists" as "No definition of last works for empty lists", sorry.
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
