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Top Forums Shell Programming and Scripting awk - output comming strange: for operator ~ and == . Post 302757417 by rveri on Thursday 17th of January 2013 12:49:52 PM
Old 01-17-2013
awk - output comming strange: for operator ~ and == .

Hi awk experts,

I am getting a strange output , may be it is normal but I am unable to comprehend,

When Using == operator it is showing correct:
Code:
# ls -l | awk '{for (i=0;i<=NF;i++) if ( $i =="info" )print $1,$6,$7,$8,$9}'
drwx------ Jan 17 10:44 info




But When using ~ (equal ) operator: two line output comes, when data has only one line only:

Code:
# ls -l | awk '{for (i=0;i<=NF;i++) if ( $i ~ "info" )print $1,$6,$7,$8,$9}'
drwx------ Jan 17 10:44 info
drwx------ Jan 17 10:44 info


Can you guys please explain, whats wrong happening here,
Thank you,
 

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TZSELECT(8)						      System Manager's Manual						       TZSELECT(8)

NAME
tzselect - select a time zone SYNOPSIS
tzselect DESCRIPTION
The tzselect program asks the user for information about the current location, and outputs the resulting time zone 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. ENVIRONMENT VARIABLES
AWK Name of a Posix-compliant awk program (default: awk). TZDIR Name of the directory containing time zone data files (default: /usr/local/etc/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 time zone TZ. EXIT STATUS
The exit status is zero if a time zone was successfully obtained from the user, nonzero otherwise. SEE ALSO
newctime(3), tzfile(5), zdump(8), zic(8) TZSELECT(8)
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