my %tmp = map { $_ => 1} @foo;
my @uniq_foo = sort keys %tmp;
%tmp = map { $_ => 1} @bar;
my @uniq_bar = sort keys %tmp;
%tmp = map { $_ => 1} @baz;
my @uniq_baz = sort keys %tmp;

##</code><code>##

use List::MoreUtils;

my @uniq_foo = uniq @foo;
my @uniq_bar = uniq @bar;
my @uniq_baz = uniq @baz;