Hi,

Please, try the code below it's an addition to suaveant previous code.
It should do what you want or you can improve on it, until you get what you really want!

use strict;
use warnings;

my $info = test();
printing($info);

sub printing {
    my ($args) = @_;
    foreach my $name ( keys %{$args} ) {

        # tell the number of emails attached to a person
        my $count = scalar @{ $args->{$name} };

        # if more than one email is attached to a person
        # that individual is not Unique
        $count == 1
          ? print "Unique: ", $name, " email: ", @{ $args->{$name} }, 
+$/
          : print "Dups: ", $name, map { " email:  $_$/" } @{ $args->{
+$name} };
    }

}

sub test {
    my @names = qw(Joe mary ann pete amy jerry Joe ann John John );
    my @email = qw(joe@test.com mary@test.com ann@nowhere.com
      pete@here.com amy@ok.com jerry@b.com joe@test.com ann@nowhere.co
+m John@test.com John@ok.com);
    my %emails;

    foreach my $name (@names) {
        push @{ $emails{$name} }, shift @email;
    }
    return \%emails;

}
[download]

Output

Unique: jerry email: jerry@b.com
Unique: pete email: pete@here.com
Dups: Joe email:  joe@test.com
 email:  joe@test.com
Dups: John email:  John@test.com
 email:  John@ok.com
Unique: amy email: amy@ok.com
Dups: ann email:  ann@nowhere.com
 email:  ann@nowhere.com
Unique: mary email: mary@test.com
[download]

You might want to check the following documentation for more info:

• perldsc
• perldata
• perllol

Also check this module: Data::Dumper
it stringified perl data structures, suitable for both printing and eval!!!