[Haskell-beginners] how to skip pattern match error when applying a mapM_

Daniel Trstenjak daniel.trstenjak at gmail.com
Tue Jan 17 20:36:37 UTC 2017

> now how can I know the behaviour in between the line of a Monad.
> I aimagine that this is the purpose of the bind method (>>=).

Yes, that's the case.

> Where is this  defined  for Maybe and IO ?

You just look at the Monad instance for the type. IO is a bit special, but
here is the one for Maybe[1].


[1] http://hackage.haskell.org/package/base-
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