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Full Discussion: Problem in sorting a text file
Special Forums UNIX Desktop Questions & Answers Problem in sorting a text file Post 302647167 by drl on Sunday 27th of May 2012 11:43:47 PM
Old 05-28-2012
Hi.

For complex ordering tasks I often use the nonstandard utility msort:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate hybrid ordering of fields, msort.
# See: http://freshmeat.net/projects/msort

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C msort

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

pl " Results of msort, hybrid ordering:"
msort -q --line --position 1,1 --comparison-type hybrid -- data1

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 5.0.8 (lenny) 
bash GNU bash 3.2.39
msort 8.44

-----
 Input data file data1:
b2
a1
b1
A1
y
m
x
1
10
11
2
3
4
M
X
Y

-----
 Results of msort, hybrid ordering:
1
2
3
4
10
11
A1
M
X
Y
a1
b1
b2
m
x
y

The msort utility was in the Debian repository for my system. See the URL noted in the script for other options.

Best wishes ... cheers, drl
 

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LEARN ABOUT DEBIAN

pm-is-supported

PM-IS-SUPPORTED(1)					       pm-utils User Manual						PM-IS-SUPPORTED(1)

NAME

       pm-is-supported - Test whether suspend or hibernate is supported.

SYNOPSIS

       pm-is-supported [{--suspend | --hibernate | --suspend-hybrid}]

DESCRIPTION

       This manual page documents briefly the pm-is-supported command.

       The intended purpose of pm-is-supported is to find out which power management modes are supported by the system. hald(8) will call it to do
       just that. (Note that UPower does not use this.)

OPTIONS

       --suspend
	   Test whether suspend is supported. Suspend is a state where most devices are shutdown, except for RAM. This state still draws power.

       --hibernate
	   Test whether hibernate is supported. During hibernate the state of the system is saved to disk, the system is fully powered off.

       --suspend-hybrid
	   Test whether hybrid-suspend is supported. Hybrid-suspend is the process where first the state of the system is saved to disk -- just
	   like with hibernate -- but instead of poweroff, the system goes in suspend state, which means it can wakeup quicker than for normal
	   hibernation. The advantage over suspend is that you can resume even if you run out of power. s2both is a hybrid-suspend implementation.

RETURN VALUE

       The result of the test for a certain powermanagement state is defined by the following exit codes.

       Code   Diagnostic
       0      State available.
       1      State NOT available.

SEE ALSO

       hald(8), pm-suspend(8), s2both(8), UPower(7)

AUTHOR

       Tim Dijkstra <tim@famdijkstra.org>
	   Manpage author.

COPYRIGHT

       Copyright (C) 2007 Tim Dijkstra

       This manual page was originally written for the Debian(TM) system, and has been adopted by the pm-utils project.

       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.

pm-is-supported 						   Apr 18, 2007 						PM-IS-SUPPORTED(1)
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