From: Geert Fannes <Geert.Fannes@...>
Date: 2005-06-03T19:07:03+09:00
Subject: Re: internal iterators in ruby

So, if I understand well, the problem with iterating over different
enumerables synchronously has to do with the absence of a #rewind and
#next method for enumerables. The Generator class solves this using the
slow #callcc method and allows one to step through the Enumerable#each
method, element by element. Wouldn't it be better if the enumerable
required a #rewind and #next method and constructs the #each method out
of these instead of doing the reverse using #callcc?
Greetings,
Geert Fannes.


You code works only for arrays, but it's quite efficient.

This works for all Enumerable types, is less efficient - and it's part
of
the std lib:

http://www.ruby-doc.org/stdlib/libdoc/generator/rdoc/classes/SyncEnumera
tor.html

Know your standard libs... :-)

Kind regards

    robert