in reply to Extending Array

An a additional possibility is to turn the HashRef into a hash variable and call a hash slice to add the next two key / value pairs. Read the perlvar detail on $; for more information

#!/usr/bin/perl

use strict;
use warnings;

my $thing = {
   'A' => 'hello',
   'B' => 'there'
};
#use a hash slice
@$thing{'C', 'D'} = ('cutie', 'pie');

print "$thing->{'A'} $thing->{'B'} $thing->{'C'} $thing->{'D'}\n";

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In Section Seekers of Perl Wisdom