From: "David A. Black" <dblack@...>
Date: 2008-12-18T07:22:18+09:00
Subject: Re: Hopefully simple regex

Hi --

On Thu, 18 Dec 2008, stephen O'D wrote:

> Hi,
>
> I am trying to make a regex that will capture strings that look like
> '@string' surrounded by whitespace or at the start or end of a line -
> here is the spec:
>
>
> require 'test/unit'
>
> class RegexTest < Test::Unit::TestCase
>
>  def setup
>    # this doesn't work correctly for the fails scenarios
>    @regex = /(@{1,1}\w+)/
>  end
>
> I have tried all sorts of combinations of character class and negated
> classes etc until my eyes have started glazing over - I really though
> this should be easy - can anyone suggest a regex that pass my spec
> above?

Try this:

   @regex = /(?:^|\s)(@\w+)/


David

-- 
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