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  1. or download this
    my @array = [[1,2,3],[4,5,6],[7,8,9]];
  2. or download this
    my @array = ([1,2,3],[4,5,6],[7,8,9]); # Note parens.
# or
my $aRef = [[1,2,3],[4,5,6],[7,8,9]]; # Note aref, not array
  3. or download this
    ${$aRef->[0]}[1]
# or
$aRef->[0]->[1]
# or the most common...
$aRef->[0][1]