$ids{'foo'}-> [ 3, 4, 5 ];
$ids{'bar'}-> [ 3 ];
$ids{'zoo'}-> [ 3, 4, 5 ];

##</code><code>##

$ids{'foo'}-> [ 5 ];

##</code><code>##

$ids{'foo'}->[ 3, 4, 5, 6 ];
$ids{'bar'}->[ 4, 5, 6, 7 ];
$ids{'zoo'}->[ 5, 6, 7, 8 ];

##</code><code>##

$ids{'foo'}->[ 3, 4, 5, 6 ];
$ids{'bar'}->[ 4, 5, 6, 7 ];
$ids{'zoo'}->[ 5, 6, 7, 8 ];
$ids{'goo'}->[ 9, 10, 11  ];