Nuno,

I have this function which write a file:

writeHtml b x y = do writeFile (b ++ ".html") (htmlCode b x y)

i need to apply to each member of a given list:

Have a look at the mapM and mapM_ functions from the Prelude. Instantiated to IO, these have the following types: mapM :: (a -> IO b) -> [a] -> IO [b] mapM_ :: (a -> IO b) -> [a] -> m () HTH, Stefan

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"developer" == developer writes:

developer> Hi, I have this function which write a file: developer> writeHtml b x y = do writeFile (b ++ ".html") (htmlCode b x developer> y) developer> i need to apply to each member of a given list: developer> the way i always try to codify functions in haskell is developer> allways the same, the most primitive one and i think i cant developer> use it here. developer> writeList [] = ??? developer> writeList (x:xs) = (writeHtml x) ??? writeList [] = return () writeList (x:xs) = do writeHtml x writeList xs -- WBR, Max Vasin.