Issue #3021 has been updated by Yusuke Endoh.

Assigned to set to Yukihiro Matsumoto

Hi,

2010/3/27 Marc-Andre Lafortune <redmine / ruby-lang.org>:
> Array#permutation and #combination will yield to the given block, or else return an enumerator.
>
> I believe Array#product should have been designed the same way.
>
> Returning an enumerator today would break compatibility though.
>
> I suggest that Array#product(&block) yields to the block and returns self. This maintains compatibility while making it possible to produce an enumerable with my_array.to_enum(:product, ...) or to avoid building an intermediate array.


Agreed!

In fact, I suggested the similar change to let Array#product
return an Enumerator.  [ruby-dev:39277]

Of course, it has a compatibility problem, and matz himself
suggested exactly the same change as you.  [ruby-dev:39306]

-- 
Yusuke ENDOH <mame / tsg.ne.jp>
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