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Top Forums Shell Programming and Scripting Sorting the contents of a variable Post 303034989 by rbatte1 on Friday 10th of May 2019 12:26:28 PM
Old 05-10-2019
How about:

Code:
OPTIONS="a b c A B D"

OPTIONS=$( \
               echo "${OPTIONS}" | \
               tr " " "\n" | \
               tr "[:upper:]" "[:lower:]" | \
               sort -u | \
               tr "\n" " " \
         )

I've just broken up the lines for clarity. Does that do the job?

Not a great plan if the content of $OPTIONS is very large (a few million items) and would be terrible with any values containing a space.

Also, don't call this in a loop because of the many many processes it might create and the costs associated with that.




Robin
 

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WRAP-AND-SORT(1)					      General Commands Manual						  WRAP-AND-SORT(1)

NAME
wrap-and-sort - wrap long lines and sort items in Debian packaging files SYNOPSIS
wrap-and-sort [options] DESCRIPTION
wrap-and-sort wraps the package lists in Debian control files. By default the lists will only split into multiple lines if the entries are longer than 80 characters. wrap-and-sort sorts the package lists in Debian control files and all .install files. Beside that wrap-and-sort removes trailing spaces in these files. This script should be run in the root of a Debian package tree. It searches for control, control.in, copyright, copyright.in, install, and *.install in the debian directory. OPTIONS
-h, --help Show this help message and exit. -a, --wrap-always Wrap all package lists in the Debian control file even if the entries are shorter than 80 characters and could fit in one line line. -s, --short-indent Only indent wrapped lines by one space (default is in-line with the field name). -b, --sort-binary-packages Sort binary package paragraphs by name. -k, --keep-first When sorting binary package paragraphs, leave the first one at the top. Unqualified debhelper(7) configuration files are applied to the first package. -n, --no-cleanup Do not remove trailing whitespaces. -d path, --debian-directory=path Location of the debian directory (default: ./debian). -f file, --file=file Wrap and sort only the specified file. You can specify this parameter multiple times. All supported files will be processed if no files are specified. -v, --verbose Print all files that are touched. AUTHORS
wrap-and-sort and this manpage have been written by Benjamin Drung <bdrung@debian.org>. Both are released under the ISC license. DEBIAN
Debian Utilities WRAP-AND-SORT(1)
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