Re: [Haskell-beginners] Noobie attempt to process log output into dependency graph

f :: [input] -> state -> outputs

.. or with state monad m it could be a combination of f :: [input] -> m outputs f :: [input] -> outputs - for intermediate results where state is not R/W state + IO is not too difficult. here is a very good explanation http://stackoverflow.com/questions/3640120/combine-state-with-io-actions I understood the last one - Use liftIO - best