Follow up question

[Stefan Karrmann]

Andre W B Furtado schrieb folgendes am Tue, Apr 03, 2001 at 12:35:05AM -0300:
> Perhaps the following code will fit your purpose:
> 
> main :: IO ()
> main = do
>     file <- readFile "c:/myfile.txt"
>     word <- getWordIO file
> 
> getWordIO :: String -> IO String
> getWordIO word = return (getWord word)

You may five the follwing a try.

main :: IO ()
main = do
   file <- readFile "c:/myfile.txt"
   let word = getWord file
   -- do some calculations with word
   -- return result


> Where getWord is the same you defined. You can also try:
> ----- Original Message -----
> From: <MikeKn22@aol.com>
> To: <haskell@haskell.org>
> Sent: Monday, April 02, 2001 10:41 PM
> Subject: Follow up question
> 
> 
> > I am a bit confused by your response Mieszko.  What I am looking to do is
> have a function say called
> >
> > ConvertString :: IO String -> String
> >
> > or something like that.  Not sure if your examples achieve this.  I want
> to take the IO String and be able to use it as a String somehow.  My problem
> is I have a function for instance
> >
> > getWord :: String -> String
> > getWord [] = []
> > getWord (x:xs)
> >     | elem x whitespace = []
> >     | otherwise         = x : getWord xs
> >
> > If I change the header to
> >
> > getWord :: IO String -> IO String
> >
> > I get errors of types not matching.  Sorry if these are stupid questions
> but I am very confused by the difference of IO String and String, and want
> to know how you can use the IO String like a String.  Thank you.
> >
> > Rob

-- 
Stefan Karrmann