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Full Discussion: Left join on files using awk
Top Forums Shell Programming and Scripting Left join on files using awk Post 302320372 by durden_tyler on Wednesday 27th of May 2009 08:14:33 PM
Old 05-27-2009
Quote:
...
ouptut:
NY,Found
NJ,Found
PA,
CA,Found
VA,Found
TN,
...
And if you have perl, then:

Code:
perl -ne 'BEGIN{open(F,"fileb"); while(<F>){split;$found{$_[0]}="Found"} close(F)} {chomp; print "$_,$found{$_}\n"}' filea

Test:

Code:
$
$ cat filea
NY
NJ
PA
CA
VA
TN
$
$ cat fileb
NY hello
NJ 3
CA 1
VA 5
$
$ perl -ne 'BEGIN{open(F,"fileb"); while(<F>){split;$found{$_[0]}="Found"} close(F)} {chomp; print "$_,$found{$_}\n"}' filea
NY,Found
NJ,Found
PA,
CA,Found
VA,Found
TN,
$

tyler_durden
 

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LEARN ABOUT CENTOS

perlver

PERLVER(1)						User Contributed Perl Documentation						PERLVER(1)

NAME

       perlver - The Perl Minimum Version Analyzer

SYNOPSIS

	 adam@red:~$ perlver Perl-MinimumVersion
	 Found directory '.'
	 Searching for Perl files... found 3 file(s)
	 Scanning lib/Perl/MinimumVersion.pm... done
	 Scanning t/01_compile.t... done
	 Scanning t/02_main.t... done

	     ---------------------------------------------------------
	   | file			| explicit | syntax | external |
	   | --------------------------------------------------------- |
	   | lib/Perl/MinimumVersion.pm | 5.005    | ~	    | n/a      |
	   | t/01_compile.t		| ~	   | ~	    | n/a      |
	   | t/02_main.t		| ~	   | ~	    | n/a      |
	     ---------------------------------------------------------

	 Minimum version of Perl required: ...

	 adam@red:~$

DESCRIPTION

       "perlver" is a console script created to provide convenient access to the functionality provided by Perl::MinimumVersion.

       --blame option shows code which requires this version of perl

       The synopsis above pretty much covers all you need to know at this point.

TO DO

       - Add PPI::Cache integration

       - Add PPI::Metrics integration (once it exists)

       - Add some sort of parseable output

SUPPORT

       All bugs should be filed via the bug tracker at

       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Perl-MinimumVersion>

       For other issues, or commercial enhancement and support, contact the author

AUTHORS

       Adam Kennedy <adamk@cpan.org>

SEE ALSO

       PPI, Perl::MinimumVersion

COPYRIGHT

       Copyright 2005 - 2012 Adam Kennedy.

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

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.16.3							    2013-01-16								PERLVER(1)
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