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Full Discussion: Sed Command and the "|"?
Top Forums Shell Programming and Scripting Sed Command and the "|"? Post 302687529 by Don Cragun on Thursday 16th of August 2012 06:06:19 PM
Old 08-16-2012
According to the POSIX standard, the sed utility uses Basic Regular Expressions (BREs). BREs don't have an the "|" operator. Some, but not all, versions of sed have a -r (or --regexp-extended) option (as an extension to the standard) that causes sed to use Extended Regular Expressions (EREs) instead of BREs. Some other versions of sed have a -E option that serves the same purpose.

EREs do have the "|" operator and would work as you expect in your perl script. The awk utility also uses EREs when selecting lines to process as well as in the sub() and gsub() string functions.

Hope this helps.
 

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Perl::Critic::Command(3)				User Contributed Perl Documentation				  Perl::Critic::Command(3)

NAME
Perl::Critic::Command - Guts of perlcritic. SYNOPSIS
use Perl::Critic::Command qw< run >; local @ARGV = qw< --statistics-only lib bin >; run(); DESCRIPTION
This is the implementation of the perlcritic command. You can use this to run the command without going through a command interpreter. INTERFACE SUPPORT
This is considered to be a public class. However, its interface is experimental, and will likely change. IMPORTABLE SUBROUTINES
"run()" Does the equivalent of the perlcritic command. Unfortunately, at present, this doesn't take any parameters but uses @ARGV to get its input instead. Count on this changing; don't count on the current interface. TO DO
Make "run()" take parameters. The equivalent of @ARGV should be passed as a reference. Turn this into an object. AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com> COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license can be found in the LICENSE file included with this module. perl v5.16.3 2014-06-09 Perl::Critic::Command(3)
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