I read your question to mean if you have a series of values in an array, how can you determine which values are not present. An easy implementation would use a hash. Assuming you have you values stored in @array, the following code would work:

my %value_hash = ();
foreach my $value (@array) {
    $value_hash{$value} = 1;
}
for my $value (0 .. 31) {
    if (not $value_hash{$value}) {
        push @missing, $value;
    }
}

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In reply to Re: screen out an untained array from a special array by kennethk
in thread screen out an untained array from a special array by Hanken

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