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Full Discussion: AWK - Different outputs *Question*
Top Forums UNIX for Dummies Questions & Answers AWK - Different outputs *Question* Post 302623315 by Corona688 on Friday 13th of April 2012 11:44:17 AM
Old 04-13-2012
The NR==FNR controls whether the code block behind it runs.

When you put the code block on a different line, the statement is used for a different purpose -- determines whether the line prints. And the code block, without anything in front of it, runs every line, and the last line is never run because of the 'next' in the line above.

Code:
BEGIN{ FS="," }
NR==FNR {A[$1]=$1;next}
{if (A[$1]==$1) print $0}

 

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LEARN ABOUT SUSE

tzselect

TZSELECT(8)						    Linux System Administration 					       TZSELECT(8)

NAME

       tzselect - select a timezone

SYNOPSIS

       tzselect

DESCRIPTION

       The  tzselect  program asks the user for information about the current location, and outputs the resulting timezone description to standard
       output.	The output is suitable as a value for the TZ environment variable.

       All interaction with the user is done via standard input and standard error.

EXIT STATUS

       The exit status is zero if a timezone was successfully obtained from the user, nonzero otherwise.

ENVIRONMENT

       AWK    Name of a Posix-compliant awk program (default: awk).

       TZDIR  Name of the directory containing timezone data files (default: /usr/share/zoneinfo).

FILES

       TZDIR/iso3166.tab
	      Table of ISO 3166 2-letter country codes and country names.

       TZDIR/zone.tab
	      Table of country codes, latitude and longitude, TZ values, and descriptive comments.

       TZDIR/TZ
	      Time zone data file for timezone TZ.

SEE ALSO

       tzfile(5), zdump(8), zic(8)

COLOPHON

       This page is part of release 3.25 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

								    2007-05-18							       TZSELECT(8)
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