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Full Discussion: combining sed commands
Top Forums UNIX for Dummies Questions & Answers combining sed commands Post 302090990 by Corona688 on Thursday 28th of September 2006 10:33:26 AM
Old 09-28-2006
You can combine multiple sed statements by concatenating them with semicolons, like 's/a/b/g;s/c/d/g'. I'm not sure those statements will do what you want, though.

Try:
Code:
sed -r 's/^(.*)$/\1new\n\1newline\n/'

Instead of using two statements, I use extended regexes, which support backreferences -- the \1 gets replaced with the contents of the brackets, letting me print it twice without two expressions.
Last edited by Corona688; 09-28-2006 at 11:38 AM..
 

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LEARN ABOUT DEBIAN

log::log4perl::resurrector

Resurrector(3pm)					User Contributed Perl Documentation					  Resurrector(3pm)

NAME

       Log::Log4perl::Resurrector - Dark Magic to resurrect hidden L4p statements

DESCRIPTION

       Loading "use Log::Log4perl::Resurrector" causes subsequently loaded modules to have their hidden

	   ###l4p DEBUG(...)
	   ###l4p INFO(...)
	   ...

       statements uncommented and therefore 'resurrected', i.e. activated.

       This allows for a module "Foobar.pm" to be written with Log4perl statements commented out and running at full speed in normal mode.  When
       loaded via

	   use Foobar;

       all hidden Log4perl statements will be ignored.

       However, if a script loads the module "Foobar" after loading "Log::Log4perl::Resurrector", as in

	   use Log::Log4perl::Resurrector;
	   use Foobar;

       then "Log::Log4perl::Resurrector" will have put a source filter in place that will extract all hidden Log4perl statements in "Foobar"
       before "Foobar" actually gets loaded.

       Therefore, "Foobar" will then behave as if the

	   ###l4p DEBUG(...)
	   ###l4p INFO(...)
	   ...

       statements were actually written like

	   DEBUG(...)
	   INFO(...)
	   ...

       and the module "Foobar" will indeed be Log4perl-enabled. Whether any activated Log4perl statement will actually trigger log messages, is up
       to the Log4perl configuration, of course.

       There's a startup cost to using "Log::Log4perl::Resurrector" (all subsequently loaded modules are examined) but once the compilation phase
       has finished, the perl program will run at full speed.

       Some of the techniques used in this module have been stolen from the "Acme::Incorporated" CPAN module, written by chromatic. Long live
       CPAN!

COPYRIGHT AND LICENSE

       Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2010-07-21							  Resurrector(3pm)
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