On 21/04/2012, Andreas Abel <andreas.a...@ifi.lmu.de> wrote:
> to avoid silly "return ()" statements like in
>
>    when cond $ do
>      monadicComputationWhoseResultIWantToDiscard
>      return ()

(when cond ∘ void) monadicComputationWhoseResultIWantToDiscard
or
when cond $ () <$ monadicComputationWhoseResultIWantToDiscard

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