Alright, I have what I believe must be a simple question. As one of the exercises for the Haskell tutorial I got I have to implement an alternative to the 'map' function. This is what I have: ----------------------------- my/prompt $ cat Test.hs module Test where my_map p [] = [] my_map p (x:xs) = p x : my_map p xs my/prompt $ hugs [snip] Hugs.Base> :l Test Test> :also Char Char> map toUpper "Hello" "HELLO" Char> my_map toUpper "Hello" ERROR - Undefined variable "my_map" ----------------------------- I can define other functions now (e.g. Fibonacci, length of a list). So I'm not sure why I'm doing wrong here. Even if my syntax is wrong in some way, the function should be defined. I would be grateful if anyone could point out my error. Cheers, Daniel.