Re: [Haskell-cafe] how to apply a function which returns IO() to a list?

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