From: Trans <transfire@...>
Date: 2007-12-16T23:21:26+09:00
Subject: Re: An idiomatic way to traverse all pairs in an enumerable?



On Dec 15, 6:03 pm, "Shot (Piotr Szotkowski)" <s...@hot.pl> wrote:
> I seem to end up doing the following quite a lot:
>
> enum.each do |a|
>   enum.each do |b|
>     next if a >= b
>     # do_something with a and b
>   end
> end
>
> In general, I'm looking for an idiomatic way of traversing each
> possible pair of a given enum's contents (once). Is there a more
> compact construct?

Facets exits for you.

http://facets.rubyforge.org/rdoc/core/classes/Enumerable.html#M000450

T.

http://facets.rubyforge.org