> > I need to extact the user name of every user who is logged in /var/log/maillog.I >just want the user name and every one must be present just one time. > Now I can extract all the strings with the user name and every name is repeated many >times.What can I do?Thanks a lot > See the documentation that comes with your installation of perl.
Or read it here: http://www.perldoc.com/perl5.6.1/pod/perlfaq4.html#How-can-I-remove-duplicate-elements-from-a-list-or-array- -Jeff Lowrey
