Traversable.mapM_ missing

[Andreas Abel]

On some haskell list I read that for lists,

   mapM_ f l

is more space-efficient that just

   void $ mapM f l

Any reason why mapM_ is missing from Data.Traversable?

Cheers,
Andreas

-- 
Andreas Abel  <><      Du bist der geliebte Mensch.

Theoretical Computer Science, University of Munich
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