The second "a" you put, shouldn´t be Integer?, shouldn´t you have an Integral ouput Type? It could be done using only things like map, iterate, take and other prelude staff: is that ok? Cheers, Luis Michelena (a "Just a student") ----- Original Message ----- From: xoo To: haskell-cafe@haskell.org Sent: Wednesday, June 05, 2002 8:59 AM Subject: (no subject) hi.. i was just wondering if some body could give a simple equation for the following situation.other than recursion plz.. occurrences :: Eq a => a -> [a] -> [a] --occurrences xs ys returns the number of times that xs occurs in ys thanks --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.368 / Virus Database: 204 - Release Date: 29/5/02