On Wed, Mar 3, 2010 at 6:30 PM, Thomas DuBuisson wrote:

On Wed, Mar 3, 2010 at 10:26 AM, Pradeep Wickramanayake wrote:

...

getItemFile :: IO String

This says getItemFile is an action that returns a string.  No arguments.

...

getItemFile test = ...

And your implementation obviously requires a file path as an argument.  You wanted a type signature of:

getItemFile :: FilePath -> IO String

or perhaps more simply (FilePath is just an alias for String):

getItemFile :: String -> IO String

Cheers, Thomas _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

Or maybe you just want: getItemFile = do test <- readFile "input.txt" return test i.e. exactly what you have but without the argument. This is actually exactly the same as getItemFile = readFile "input.txt"