[Haskell-beginners] [IO String] to IO [String]
nathan.huesken at posteo.de
Sun Mar 31 12:24:33 CEST 2013
sequence :: Monad m => [m a] -> m [a]
sequence f :: IO [String]
should be what you want.
On 03/31/2013 12:19 PM, 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?
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