From: "David A. Black" <dblack@...>
Date: 2008-12-15T04:18:46+09:00
Subject: Re: Help with an "easy" regular expression substitution

--1926193751-198042275-1229282769=:4313
Content-Type: MULTIPART/MIXED; BOUNDARY="1926193751-198042275-1229282769=:4313"

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

--1926193751-198042275-1229282769=:4313
Content-Type: TEXT/PLAIN; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8BIT

Hi --

On Mon, 15 Dec 2008, Iñaki Baz Castillo wrote:

> El Domingo, 14 de Diciembre de 2008, David A. Black escribió:
>> The first thing that comes to mind:
>>
>>    text.sub(/(X-Level: )(\*+)/) { $1 + 'X' * $2.size }
>>
>> or, in Oniguruma, using look-behind:
>>
>>   text.sub(/(?<=X-Level: )(\*+)/) { 'X' * $1.size }
>
> Thanks, this is valid in Ruby, but I understand such a operation is not
> feasible with "sed" command, is it?
> I'm not sure yet about if I'll need to do this script in Ruby or Shell.

Just in case:

sed -Ee '/X-Level: \*+/s/\*/X/g'


David

-- 
David A. Black / Ruby Power and Light, LLC
Ruby/Rails consulting & training: http://www.rubypal.com
Coming in 2009: The Well-Grounded Rubyist (http://manning.com/black2)
--1926193751-198042275-1229282769=:4313--
--1926193751-198042275-1229282769=:4313--