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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 303034987 by jgt on Friday 10th of May 2019 12:13:22 PM
Old 05-10-2019
Sorting the contents of a variable
i want to reduce the OPTIONS variable which is a list of email addresses to just the unique entries. The following works, but, i would like to accomplish it without using the temporary file (dest.txt)



Code:
$echo $OPTIONS                         
a b c A B D                                         
$cat clean                             
#!/usr/bin/bash                                     
n=$#                                                
i=1                                                 
cat /dev/null >/usr/spool/lp/temp/dest.txt          
while [ $i -le $n ]                                 
do                                                  
        c=$(echo $1 |tr "[:upper:]" "[:lower:]" )   
        echo $c>>/usr/spool/lp/temp/dest.txt        
        shift                                       
        let i=$i+1                                  
done                                                
sort -u </usr/spool/lp/temp/dest.txt                
                                                    
$ OPTIONS1=$(./clean $OPTIONS)          
$ echo $OPTIONS1                        
a b c d                                             
$

 

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LEARN ABOUT BSD

nfdump

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

NAME

       nfdump, nfload - notesfile dump/load programs

SYNOPSIS

       nfdump notesfile

       nfload [ -Ddirectory ] notesfile

DESCRIPTION

       Nfdump and nfload are used to convert notesfile data base formats.

       Nfdump  converts  the  specified  notesfile  to a portable ASCII format and writes it to standard output.  Some diagnostics are produced on
       stderr.	Nfdump can be run by any user; access to a particular notesfile is governed by that notesfile's access list.

       Nfload is used on the output from nfdump to create a new notesfile.  The -D option specifies an alternate base directory for the notesfile.
       If unspecified, this defaults to ``/usr/spool/notes''.  Nfload reads standard input for the ASCII representation of the notesfile.

       Typical	use  of  these	two programs occurs when converting an existing notesfile data base to a new format.  The nfdump program should be
       compiled with the older structure definitions while nfload is compiled with the newer structures.  The data base can then be converted with
       a shell script of the following nature:

	    mkdir .OLD
	    mv * .OLD
	    for i in `ls .OLD`
	    do
		 echo $i start
		 nfdump $i | nfload -D/usr/spool/newnotes $i
	    done
		 echo $i done
	    echo ALL DONE
	    rm -rf .OLD

       This assumes that the old data base is in ``/usr/spool/notes'' and the new data base is to be placed in ``/usr/spool/newnotes''.  After the
       conversion is complete, one can move the old data base from ``/usr/spool/notes'' to ``/usr/spool/oldformat'' and the  new  data	base  from
       ``/usr/spool/newnotes'' to ``/usr/spool/notes''.

FILES

SEE ALSO

       notes(1),
       The Notesfile Reference Manual

AUTHORS

       Ray Essick (uiucdcs!essick, essick%uiuc@csnet-relay.arpa)
       Department of Computer Science
       University of Illinois at Urbana-Champaign
       Urbana, IL

       Rob Kolstad (kolstad@convex.UUCP)
       CONVEX Computer Corporation
       Richardson, TX

							      University of Illinois							 NFDUMP(8)
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