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Full Discussion: Flat file to csv conversion
Top Forums Shell Programming and Scripting Flat file to csv conversion Post 302405669 by Franklin52 on Friday 19th of March 2010 12:56:28 PM
Old 03-19-2010
The given command should work, but to be more precise, if the lines are ending with txt you can use the $ anchor:
Code:
awk '/txt$/{if(s){print s}{s=$0;next}}{s=s "," $0}' file

More about anchors:

Regexp Operators - The GNU Awk User's Guide
 

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PPIx::Regexp::Token(3pm)				User Contributed Perl Documentation				  PPIx::Regexp::Token(3pm)

NAME
PPIx::Regexp::Token - Base class for PPIx::Regexp tokens. SYNOPSIS
use PPIx::Regexp::Dumper; PPIx::Regexp::Dumper->new( 'qr{foo}' )->print(); INHERITANCE
"PPIx::Regexp::Token" is a PPIx::Regexp::Element. "PPIx::Regexp::Token" is the parent of PPIx::Regexp::Token::Assertion, PPIx::Regexp::Token::Backtrack, PPIx::Regexp::Token::CharClass, PPIx::Regexp::Token::Code, PPIx::Regexp::Token::Comment, PPIx::Regexp::Token::Control, PPIx::Regexp::Token::Greediness, PPIx::Regexp::Token::GroupType, PPIx::Regexp::Token::Literal, PPIx::Regexp::Token::Modifier, PPIx::Regexp::Token::Operator, PPIx::Regexp::Token::Quantifier, PPIx::Regexp::Token::Reference, PPIx::Regexp::Token::Structure, PPIx::Regexp::Token::Unknown, PPIx::Regexp::Token::Unmatched and PPIx::Regexp::Token::Whitespace. DESCRIPTION
This class represents the base of the class hierarchy for tokens in the PPIx::Regexp package. METHODS
This class provides no public methods beyond those provided by its superclass. SUPPORT
Support is by the author. Please file bug reports at <http://rt.cpan.org>, or in electronic mail to the author. AUTHOR
Thomas R. Wyant, III wyant at cpan dot org COPYRIGHT AND LICENSE
Copyright (C) 2009-2012 by Thomas R. Wyant, III This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full text of the licenses in the directory LICENSES. This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. perl v5.14.2 2012-06-06 PPIx::Regexp::Token(3pm)
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