From: William Morgan <wmorgan-ruby-talk@...>
Date: 2005-03-11T21:45:44+09:00
Subject: Re: Is iterating in lock-step possible?

Excerpts from Roshan James's mail of 11 Mar 2005 (EST):
> On a related note, I had asked this question about C# and it looks like
> C# can do both of these cleanly - 
> foreach(<type> t in foo())
> {
> 	foreach(<type> t in bar())
> 	{
> 		//nested
> 	}
> }

I think you might be overlooking the obvious, which is that you can take
this approach in Ruby. You're writing the objects that do the
computations, right? Simply give them #next? and #next methods and use a
while loop. That's what you'd be doing in these other languages.

The prevalence of internal iterators in Ruby's API is simply a
reflection of the fact that they're so nice to use. It's not the only
way to iterate.

-- 
William <wmorgan-ruby-talk@masanjin.net>