From: Stefan Rusterholz <apeiros@...>
Date: 2007-08-08T09:28:08+09:00
Subject: Re: Alternate Regular Expressions?

Kenneth McDonald wrote:
> the biggest problem with regular expressions in most languages isn't the
> syntax, but rather
> the inability to easily compose small REs into larger REs. Which is why
> so many programs end
> up with huge, unreadable REs.

You can do that in ruby rather simply:
# example taken from an example earlier in this thread
name = /[a-z]+/i
host = /[a-z]+/i
tld = /com|net|org|edu/
input.scan(%r{\b#{name}@#{host}\.#{tld}\b}) do |match|
   puts "Found email address #{match}"
end

Regards
Stefan
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