[Haskell-beginners] Maybe monad and computations

[Emmanuel Touzery]

Hello,

 I'm often using the Maybe monad to combine Maybe computations one after
the other without conditionals.

 But I'm not sure how to do it, when I have several operations which return
Maybe and I want all the indiviual values in the end, not a combination of
the values.

 Currently I do:

let allTogether = do
  ma <- doA
  mb <- doB
  return (ma, mb)
case allTogether of
  Nothing -> ...
  Just (a, b) -> ...

 This way in this case I have one case instead of two, however I'm sure
there must be a nicer way to achieve this result?

 Thank you!

Emmanuel
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