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Full Discussion: Comparing two files and writing mismatched rows along with mismatched columns. Pointing out the mism
Top Forums UNIX for Advanced & Expert Users Comparing two files and writing mismatched rows along with mismatched columns. Pointing out the mism Post 302997144 by drl on Monday 8th of May 2017 01:29:03 PM
Old 05-08-2017
HI.

Using your sample data, here is a solution using a GNU utility, dwdiff. Basically, it operates on space-separated words, so I modified your sample files to be that instead of | separated:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate field/word diff, dwdiff.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C dwdiff

FILE=${1-data1}

pl " Input data files:"
head data?

pl " Amended data files::"
sed 's/|/ /g' data1 > t1
sed 's/|/ /g' data2 > t2
head t?

pl " Results:"
dwdiff t1 t2

pl " More details for dwdiff:"
dixf dwdiff

exit 0

producing:
Code:
$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.7 (jessie) 
bash GNU bash 4.3.30
dwdiff 2.0.9

-----
 Input data files:
==> data1 <==
1|piyush|bangalore|dev 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|delhi|QA

==> data2 <==
1|piyush|bangalore|QA 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|bangalore|dev

-----
 Amended data files::
==> t1 <==
1 piyush bangalore dev 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit delhi QA

==> t2 <==
1 piyush bangalore QA 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit bangalore dev

-----
 Results:
1 piyush bangalore [-dev-] {+QA+} 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit [-delhi QA-] {+bangalore dev+}

-----
 More details for dwdiff:
dwdiff  a delimited word diff program (man)
Path    : /usr/bin/dwdiff
Version : 2.0.9
Type    : ELF 64-bit LSB executable, x86-64, version 1 (SYSV ...)
Help    : probably available with --help
Repo    : Debian 8.7 (jessie)

Note that the braces enclose the markers + for an addition, - for a deletion.

There are a number of additional options. See man dwdiff for details.

Best wishes ... cheers, drl
 

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LEARN ABOUT DEBIAN

empty-page

EMPTY-PAGE(1)							 ExactImage Manual						     EMPTY-PAGE(1)

NAME

       empty-page - empty page detector of the ExactImage toolkit

SYNOPSIS

       empty-page [option...] {-i | --input} input-file

       empty-page {-h | --help}

DESCRIPTION

       ExactImage is a fast C++ image processing library. Unlike many other library frameworks it allows operation in several color spaces and bit
       depths natively, resulting in low memory and computational requirements.

       empty-page counts dark pixels of a black and white image and decides with a threshold whether the page is most probably empty, and thus can
       be removed from the image processing stream.

OPTIONS

       -i file, --input file
	   Read image from the specified file.

       -m n, --margin n
	   Set width of border margin to skip. For speed reasons, the margin has to be a multiple of 8. The default is 16.

       -p x, --percentage x
	   Set fraction of permissible dark pixels. The default is 0.05 (5%).

       -h, --help
	   Display help text and exit.

EXAMPLES

	   $ empty-page -i test.tif
	   The image has 75461 dark pixels from a total of 1060992 (7.11231%).
	   non-empty

EXIT STATUS

       The exit status is 0 if the image is mostly white, 1 otherwise.

SEE ALSO

       exactimage(7)

AUTHORS

       Jakub Wilk <jwilk@debian.org>
	   Wrote this manual page for the Debian system.

       http://www.exactcode.de/site/open_source/exactimage/
	   This manual page incorporates texts found on the ExactImage homepage.

COPYRIGHT

       This manual page was written for the Debian system (and may be used by others).

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at
       your option) any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2.

empty-page							    09/09/2013							     EMPTY-PAGE(1)
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