From: Doug Knight <doug.knight@uaf.edu>
To: "Mário Gamito" <gamito@gmail.com>
Cc: linux-admin@vger.kernel.org
Subject: Re: Removing lines - Part II
Date: Mon, 16 Apr 2007 13:36:15 -0800 [thread overview]
Message-ID: <4623EC4F.1060605@uaf.edu> (raw)
In-Reply-To: <CDE16182-5F7F-4232-A6AC-12C7D51E87A2@iicm.edu>
Mário,
I'll try to save you some time here. The script below should do exactly
what you asked for help with. However, as you can see, sed is a
``write only'' language. If you're going to be maintaining this code, I
would suggest rewriting it in something a bit more readable such as awk,
or perl.
-------- START OF FILE --------
\|<h4 class="post-title"><a href="http://tuxvermelho\.blogspot\.com/2006/08/bourne-shell.html">Bourne Shell</a></h4>| b remove
: next
P
d
: remove
s|<h4 class="post-title"><a href="http://tuxvermelho\.blogspot\.com/2006/08/bourne-shell.html">Bourne Shell</a></h4>.*<p><a href="http://domain.com/2006/08/bourne-shell.html">Sáb, 14 Abr 2007 12:31:07</a></p>||
t next
N
b remove
-------- END OF FILE --------
If you want to fit the script on one line, replace the line feeds with semicolons (``;'').
Doug Knight
P.S. I would advise against making a habit of using ``$'' or any other
character that has special meanings in regular expressions as a
substitution delimiter, unless you enjoy driving yourself crazy when things
don't work the way you expect them to.
Florian Klien wrote:
> On 16.04.2007, at 17:18, Mário Gamito wrote:
>> i do:
>> # sed -e 's/<h4 class="post-title"><a
>> href="http://tuxvermelho.blogspot.com/2006/08/bourne-shell.html">Bourne
>> Shell</a></h4>/<!--/' < index.html
>
> well you should escape the '/', like:
> sed -e 's/<h4 class="post-title"><a
> href="http\:\/\/tuxvermelho.blogspot.com\/2006\/08\/bourne-shell.html">Bourne
> Shell<\/a><\/h4>/<!--/'
>
> works for me. [1]
>
> you could also substitute '/' with '$':
> sed -e 's$<h4 class="post-title"><a
> href="http\://tuxvermelho.blogspot.com/2006/08/bourne-shell.html">Bourne
> Shell</a></h4>$<!--$'
>
> then you don't need to escape anything except there would be a '$' in
> the text....
>
> hth
> florian
> [1]: $ sed --version
> GNU sed version 4.1.4
> Copyright (C) 2003 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
> to the extent permitted by law.
> --Florian Klien
> student of Telematics, tutor for 'Introduction to Structured
> Programming' and 'Software Development Practical Exercises'
> at Graz university of technology.
> "When in doubt, use brute force.", Ken Thompson
>
>
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prev parent reply other threads:[~2007-04-16 21:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-16 15:18 Removing lines - Part II Mário Gamito
2007-04-16 15:41 ` Florian Klien
2007-04-16 21:36 ` Doug Knight [this message]
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