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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.
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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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