http://qs321.pair.com?node_id=245119


in reply to Detecting duplicate keywords passed in a form

Remove the duplicate words in a list and preserve the original order of the words:

  my %seen;
  my @keywords = grep ! $seen{lc()}++, qw(this that other foo THIS bar
+);

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Dan Kubb, Perl Programmer

In Section Seekers of Perl Wisdom