Hi,

2010/3/31 Yusuke Endoh <redmine / ruby-lang.org>:
> 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]


Matz agreed with this feature in [ruby-dev:40867].  Thanks!

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