[Haskell-beginners] Re: Count how often a menu has been selected

Felipe wrote:

If you want variables in the impure sense, use IORefs.

import Data.IORef

...

a <- newIORef 0 onActivateLeaf menuAddOne $ do modifyIORef a (+1) print a

Hi Felipe, this works great except for the "print a" part which I replaced by: b <- readIORef a print b I should now have the tools to try to implement my real life problem. Thank you, Bernhard