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Full Discussion: Sorting the contents of a variable
Top Forums Shell Programming and Scripting Sorting the contents of a variable Post 303034988 by stomp on Friday 10th of May 2019 12:25:32 PM
Old 05-10-2019
Code:
echo "4 2 d c b 1 a b A b 1 B C a b c d" | ./clean.awk

# output
 a b c d 1 2 4

clean.awk
Code:
#!/usr/bin/awk -f
{
   for(i=1;i<=NF;i++)
      a[tolower($i)]=1
} 

END{ 
   for(i in a)
      printf i " "
   printf "\n"
}

awk seems to have a sorting algorithm when accessing lists.

...or in one line:

Code:
echo "4 2 d c b 1 a b A b 1 B C a b c d" | awk '{for(i=1;i<=NF;i++) {a[tolower($i)]=1}} END{for(i in a) {printf i " "} ; printf "\n"}'

 

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LEARN ABOUT LINUX

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 3.55 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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