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  1. or download this
    @$outputRef = sort @$outputRef;
  2. or download this
    my $foo = [ [ 4, 1, 6 ], [ 4, 1, 5 ] ];
    my $foo_0 = $foo->[0];
    my $foo_1 = $foo->[1];
    ...
    
    use Data::Dumper;
    print Dumper($foo);