Thanks, that helped! Even tough I don't understand what "for my $i (0 .. $#arr)" means, changing 
sub reverseArray {
    for(my $i=0;$i<scalar(@_);$i++){
        @{$_[$i]} = reverse @{$_[$i]};
    }
}

[download]
to 
sub reverseArray {
    my @arr = @_;
    for(my $i=0;$i<scalar(@arr);$i++){
        $arr[$i] = [reverse @{$arr[$i]}];
    }
}

[download]
did the trick!

So, if I understand it correctly, a subroutine can change variables from the function it was called from.

In reply to Re^2: Array value changing for some reason by Silt
in thread Array value changing for some reason by Silt

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