On Mon, Jun 20, 2011 at 1:33 AM, Dmitri O.Kondratiev <dokondr@gmail.com> wrote:

Thanks! Everything works, and 'when' is really nice.
( I still have only basic monad knowledge, need more time to spend on existing libraries)

I heavily use 'when' and 'unless'. ('unless b x' is the same as 'when (not b) x'.)