Thanks and sorry. Beside new in Haskell i'm also new in this archive lists. So, i was not aware i had sent with sucess the mail to the first list. lesina

-----Original Message----- From: Keith Wansbrough [SMTP:Keith.Wansbrough@cl.cam.ac.uk] Sent: Friday, November 07, 2003 3:00 PM To: Marta Isabel Oliveira Cc: haskell@haskell.org; haskell-cafe@haskell.org Subject: Re: automaticly create the ana, cata, hylomorphisms

...

Hello programmers,

I have a problem to solve and don't have a clue where to start.

This is a homework question. Please read

http://www.haskell.org/hawiki/HomeworkHelp

for some helpful hints.

By the way, you shouldn't post the same message to multiple lists - you should choose the right one (haskell-cafe in this case), or if you must, cross-post one message to both. This means people who subscribe to both won't see your message twice.

--KW 8-) -- Keith Wansbrough http://www.cl.cam.ac.uk/users/kw217/ University of Cambridge Computer Laboratory.