From: Sylvain Joyeux <sylvain.joyeux@...>
Date: 2007-01-23T17:40:47+09:00
Subject: Re: Regular expression: Is this a bug or feature?

> irb(main):001:0> s1='a=1'
> => "a=1"
> irb(main):003:0> s1 =~ /a|b=(.)/
> => 0                              <------ expression matches
> irb(main):004:0> $1
> => nil                            <------ but where is argument?
You wanted to do s1 =~ /(?:a|b)=(.)/. The | operator has a low precedence 
in regexps
-- 
Sylvain Joyeux