Re: [Haskell-cafe] Use forM_ with Maybe, it's Foldable!

27 Jan 2013


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Felipe Almeida Lessa  writes:
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A few days ago I decided to hoogle the type of whenJust [2] and what I
discovered is that
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import Data.Foldable (forM_)
  whenJust = forM_
You can also use "for_", if you want to use Applicative instead of Monad.

-- 
John Wiegley
FP Complete                         Haskell tools, training and consulting
http://fpcomplete.com               johnw on #haskell/irc.freenode.net