From: "David A. Black" <dblack@...>
Date: 2008-07-03T19:52:14+09:00
Subject: Re: yet another regexp problem

--1926193751-839390554-1215082522=:5982
Content-Type: MULTIPART/MIXED; BOUNDARY="1926193751-839390554-1215082522=:5982"

  This message is in MIME format.  The first part should be readable text,
  while the remaining parts are likely unreadable without MIME-aware tools.

--1926193751-839390554-1215082522=:5982
Content-Type: TEXT/PLAIN; charset=X-UNKNOWN; format=flowed
Content-Transfer-Encoding: QUOTED-PRINTABLE

Hi --

On Thu, 3 Jul 2008, Benjamin Billian wrote:

> On 3 Jul., 12:22, shaman <no...@nowhere.com> wrote:
>> Srijayanth Sridhar pisze:
>>
>> =A0> /([a-z]{3})[02-9][0-9]{2}\1/
>> =A0>
>> =A0> Should work.
>>
>> it's not so easy because "vvv133vvv" also should match but your
>> expression return nil :(
>
> The following Expression worked for me:
> /[a-z]{3}(?:(?:[^1]\d{2})|(?:1[^2]\d)|(?:12[^3]))[a-z]{3}/

You can just use negative lookahead:

   (?!123)


David

--=20
Rails training from David A. Black and Ruby Power and Light:
   Intro to Ruby on Rails  July 21-24      Edison, NJ
   Advancing With Rails    August 18-21    Edison, NJ
See http://www.rubypal.com for details and updates!
--1926193751-839390554-1215082522=:5982--
--1926193751-839390554-1215082522=:5982--