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Full Discussion: Remove duplicated records and update last line record counts
Top Forums Shell Programming and Scripting Remove duplicated records and update last line record counts Post 303032048 by Don Cragun on Sunday 10th of March 2019 06:29:06 AM
Old 03-10-2019
Quote:
Originally Posted by nezabudka
Hi Don, thanks for the explanation.
Code:
awk 'BEGIN {FS=OFS=","} /^T/ {$2=length(A)} !A[$0]++'

Hi nezabudka,
Always glad to help.

This is another interesting way to do it. Unfortunately, the standards do not specify the behavior of the awk length built-in function when given an array name as an argument. This use is described on the GNU gawk man page and works in BSD awk version 20070501 (but is not documented in the BSD awk man page) that is installed on macOS Mojave (version 10.14.3).

I have no idea whether or not this will work (as an undocumented feature) on green_k's Solaris system in /usr/xpg4/bin/awk or nawk. I also do not know if gawk is installed on green_k's system.
This User Gave Thanks to Don Cragun For This Post:
nezabudka
 

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LEARN ABOUT OPENSOLARIS

ucblinks

ucblinks(1B)					     SunOS/BSD Compatibility Package Commands					      ucblinks(1B)

NAME

       ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices

SYNOPSIS

       /usr/ucb/ucblinks [-e rulebase] [-r rootdir]

DESCRIPTION

       ucblinks  creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
       ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.

       ucblinks does not remove unneeded compatibility links; these must be removed by hand.

       ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been  created,
       since the reconfiguration may have resulted in more compatibility names being needed.

       In  releases prior to SunOS 5.4, ucblinks used a  nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses  nawk
       for the default operation, although  nawk rule-bases can still be specifed with the -e option.  The  nawk rule-base equivalent to the SunOS
       5.4 default operation can be found in /usr/ucblib/ucblinks.awk.

OPTIONS

       -e rulebase    Specify rulebase as the file containing nawk(1) pattern-action statements.

       -r rootdir     Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.

FILES

       /usr/ucblib/ucblinks.awk    sample rule-base for compatibility links

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)

SunOS 5.11							    13 Apr 1994 						      ucblinks(1B)
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