[Haskell-beginners] combine concatMap and mapM

[Renah Scarowsky]

Hi,

How would I combine the functionalities of concatMap and mapM to define a function like:
Monad m => (a  -> m [b]) -> [a] -> m [b]

I need to create a recursive function within the IO monad which results in a list of the original type.
So something like:
goX :: MonadIO m => x -> m [x]
goX = do
....
x includes within it a list of xs, let's call it (children x)
I need to call goX on each of the children and get a modified list of children as result
ys <- ?
return $ x { children = ys } : zs


Thanks,

Renah Scarowsky
Suite Solutions
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http://www.suite-sol.com<http://www.suite-sol.com/>


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