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Full Discussion: Comparing rows and columns
Top Forums Shell Programming and Scripting Comparing rows and columns Post 302512449 by itkamaraj on Sunday 10th of April 2011 10:35:49 AM
Old 04-10-2011
Code:
for i in `cut -d, -f1 file_name | sort -u`; do sort -rk2 file_name | grep -m1 $i; done

---------- Post updated at 08:05 PM ---------- Previous update was at 08:05 PM ----------

Code:
kamaraj@kamaraj-laptop:~/Desktop/Scripts$ cat interchange 
file1.h, 2.0
file2.c, 3.1
file1.h, 2.5
file3.c, 3.3.3
file1.h, 1.2.3
kamaraj@kamaraj-laptop:~/Desktop/Scripts$ for i in `cut -d, -f1 interchange | sort -u`; do sort -rk2 interchange | grep -m1 $i; done
file1.h, 2.5
file2.c, 3.1
file3.c, 3.3.3

This User Gave Thanks to itkamaraj For This Post:
pravsripad
 

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LEARN ABOUT SUSE

lzdiff

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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