From: Ryan Davis <ryand-ruby@...>
Date: 2004-12-08T07:55:04+09:00
Subject: Re: [rcr] String#split behaves odd

To weigh in, I think the behavior of split should necessarily be 
compared to splits in other languages, as long as our split acts in a 
consistent and well behaved way. For me, that roughly means that there 
should be a 1:1 correlation between join and split. Namely, anything 
split (with a constant string/pattern) should be able to be joined back 
to the original using that constant string. This is not currently the 
case in ruby:

irb(main):008:0> %w( aabb bbaa ).map do |s| s.split(/a/).join('a') == 
s; end
=> [true, false]