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Top Forums Shell Programming and Scripting Delete a row that has a duplicate column Post 302321059 by ks_reddy on Saturday 30th of May 2009 01:55:20 AM
Old 05-30-2009
Hi Friends,

Can anybody change the above script "#awk 'a !~ $1; {a=$1}' test.log
" to keep the last repeated entry and delete all the previous duplicates.
For example if the input file is
1 2 3 4
2 2 4 5.
Here column 2 field(s) are repeating.
So I want the output as 2 2 4 5 but not 1 2 3 4.
Thanks in advance..
 

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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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