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Top Forums Shell Programming and Scripting figuring out an awk one liner Post 302640873 by benalt on Tuesday 15th of May 2012 11:33:28 AM
Old 05-15-2012
figuring out an awk one liner

I have googled around a bit and could not find an answer to how this works:
Code:
echo $STRING | awk '$0=$NF' FS=

I know what each part is doing. The record is being set to equal the last field and the field separator is being set to null so that each character is considered a field. Why can FS= be put at the end like that though? I presume that the '$0=$NF' is used as a pattern match. Perhaps my problem is more with the syntax as I am used to using awk more like:
Code:
   awk '/string/ { # some code etc. }'

Thanks,
Ben

Last edited by Scrutinizer; 05-15-2012 at 12:34 PM.. Reason: code tags
 

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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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