You can use sequence which will turn your [IO String] into a IO [String]. If you want to "map a function" along the way, you can use mapM (or traverse): That is: mapM :: (String -> IO b) -> [IO String] -> IO [b] For further reading, there is a paper about this function called The Essence of the Iterator Pattern. On 31/03/13 20:19, Ovidiu D wrote:
I have the function f which reads lines form the stdin and looks like this:
f :: [IO String] f = getLine : f
What I don't like is the fact that the line processing I'm doing will have to be in the IO Monad
I would like to make this function to have the signature f : IO [String] ...such that I can get rid of the IO monad and pass the pure string list to the processing function.
Can I do this?
Thanks
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