Proposal: Add &&& and *** to Data.Tuple

Yitzchak Gale gale at
Thu Oct 18 06:23:22 EDT 2007

May I suggest an alternative?

Write a nice wiki article explaining that you do not
need to understand arrows to use these functions.

Show what the types of the functions are when
used in the naive way, and give some nice examples.

Explain anything else that a beginner might need
to know when using them in this way - like,
how to understand weird error messages you
might get in GHC or Hugs. Or when it might
be necessary to specify a type signature when
otherwise you wouldn't have needed to.

Put a link to the wiki article in the Haddock docs
for Control.Arrow, and in various tutorials. And we are


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