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Top Forums Shell Programming and Scripting Print array into a single file - AWK Post 302724297 by Corona688 on Wednesday 31st of October 2012 01:07:05 PM
Old 10-31-2012
NR and FNR are special variables in awk. NR means the total number of records processed, FNR is the number of records read from the current file. When they are identical, that means you are in the very first file and nowhere else.

I use that to load the list of stuff to translate into awk, stuffing it into an array like T["AAA"]="-10" Then the 'next' tells it to skip to the next line, preventing it from running any of the code below.

For all the other files, it checks if the array T has anything with an index identical to column 8. $8 in T ...and if it does, it just overwrites column 8 with the contents of the array. $8=T[$8]

Then it prints the entire line to the file FILENAME ".aaa". FILENAME is a special variable which names the current file. Putting two strings together like this concatenates them. So if the current file is file1, it will write to "file1.aaa".
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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). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWgawk | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+ NOTES
Source for gawk is available on http://opensolaris.org. Free Software Foundation Nov 3 1999 IGAWK(1)
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