$array{ pack 'C*', @sortedIndices } = $somevalue;

##</code><code>##

$array->[1][2] = 'the value';
... sometime later
$array->[1][2][3] = 'the value';

##</code><code>##

$array->{ pack 'C*', 1, 2 } = 'the value';
$array->{ pack 'C*', 1, 2, 3 } = 'the value';