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Top Forums Shell Programming and Scripting Compare two files and print the two lines with difference Post 302327320 by drl on Saturday 20th of June 2009 09:01:07 PM
Old 06-20-2009
Hi.

If you have access to Linux, a recent package, moreutils, contains a number of clever utilities, among them is combine:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate combine from Linux package moreutils.

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1) combine
set -o nounset
echo

FILE1=data1
FILE2=data2

echo
echo " Data file $FILE1:"
cat $FILE1

echo
echo " Data file $FILE2:"
cat $FILE2

echo
echo " Results not in $FILE2:"
combine $FILE1 not $FILE2

echo
echo " Results not in $FILE1:"
combine $FILE2 not $FILE1

exit 0

Producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
combine - ( /usr/bin/combine Jun 28 2008 )


 Data file data1:
ABCD 4322 26485
JMTJ 5311 97248
XMPJ 4321 58978

 Data file data2:
ABCD 4321 26485
JMTJ 5311 97248
XMPJ 4321 68978

 Results not in data2:
ABCD 4322 26485
XMPJ 4321 58978

 Results not in data1:
ABCD 4321 26485
XMPJ 4321 68978

Best wishes ... cheers, drl
 

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

NAME
Struct::Compare - Recursive diff for perl structures. SYNOPSIS
use Struct::Compare; my $is_different = compare($ref1, $ref2); DESCRIPTION
Compares two values of any type and structure and returns true if they are the same. It does a deep comparison of the structures, so a hash of a hash of a whatever will be compared correctly. This is especially useful for writing unit tests for your modules! PUBLIC FUNCTIONS
o $bool = compare($var1, $var2) Recursively compares $var1 to $var2, returning false if either structure is different than the other at any point. If both are undefined, it returns true as well, because that is considered equal. BUGS
/NEEDED ENHANCEMENTS o blessed references compare currently does not deal with blessed references. I need to look into how to deal with this. LICENSE
(The MIT License) Copyright (c) 2001 Ryan Davis, Zen Spider Software Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. AUTHOR
Ryan Davis <ryand-cmp@zenspider.com> Zen Spider Software <http://www.zenspider.com/ZSS/> perl v5.12.4 2011-07-04 Compare(3pm)
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