[Haskell-beginners] Global variables

[Krzysztof Skrzętnicki]

You can store IORef / MVar / whatever in the environment. The counter is
supposed to be global, so it should work for multiple threads.

Best regards,
Krzysztof Skrzętnicki

On Wed, Jun 29, 2011 at 17:27, Christopher Done <chrisdone at googlemail.com>wrote:

> On 29 June 2011 17:22, Michael Xavier <nemesisdesign at gmail.com> wrote:
> > I tend to use Control.Monad.Reader for stateful stuff like this. It is
> found
> > in the mtl package
> > http://hackage.haskell.org/package/mtl-2.0.1.0
>
> How would you use reader for a counter?
>
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