There is a little program of which behavior I don't understand.
If it's not a bug, could you explain it to me ?
> filename = "data.txt"
> bug :: IO()
> bug =
> do db <- readFile filename
> --putStr (show db)
> writeFile filename ("abc"++db)
This program runs perfectly well. But if the line with the 'putStr' is
removed, then the resulting file is incorrect: instead of writing s
and then copy what was in the file, only s is written, as if the
variable db' was empty, whatever was in the file.
Else, thanks for your job ! Haskell and Hugs, are really great tools.
Pierre Lemaire
