Re: [Haskell-beginners] File I/O: reading from, writing to, same file in one function

On Thu, Feb 5, 2015 at 10:30 PM, Geoffrey Bays wrote:

Francesco:

Unfortunately, using withFile I get the same error as before with handles: hPutStr: illegal operation (handle is closed).

This error suggests you're forgetting to reopen your file in WriteMode once withFile closed it (you *did *read the documentation of withFile ?). Trying to write on a closed handle is an exercise in futility. -- Jedaï