G'day all.
Quoting Asfand Yar Qazi <[EMAIL PROTECTED]>:
> Actually, I'm trying to avoid library functions, so I can learn the
> language and the functional way of thinking. How would one implement
> the concatMap function?
See if you can work how how this one works. No library functions, apart
from function composition.
statesList :: StateNode a -> [a]
statesList s
= statesList' s []
where
statesList' (State x) = (x:)
statesList' (CompositeState xs) = statesLists xs
statesLists [] = id
statesLists (x:xs) = statesList' x . statesLists xs
Cheers,
Andrew Bromage
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