From: Pit Capitain <pit@...>
Date: 2002-11-19T17:13:06+09:00
Subject: Re: ruby-dev summary 18711-18810

On 19 Nov 2002 at 2:00, Bob Alexander wrote:

> (...)
> Hopefully, if "zip" becomes part of
> Ruby, the implementation could be as an iterator which never builds a
> physical version of the zipped sequence. But that is an implementation
> challenge if the input sequence are general instances of Enumerable,
> since the input sequences cannot be efficiently iterated in parallel.

Do you know implementations like (from Ruby CVS) 
rough/lib/generator.rb? Why do you think these are inefficient?

Regards,
Pit