Updated: To reflect the reality check from johngg below.

Comparison of packed integer will only work if they are unsigned (or all positive or all negative) and packed in big-endian (Network) order: 

$belo = pack 'N', 10000; $behi = pack 'N', 20000; $ben = pack 'N', 123
+45;;
$belo lt $ben && $behi gt $ben and print 'Works';;
Works

[download]

Not if they are packed in little-endian (VAX) order:

$lelo = pack 'V', 10000; $lehi = pack 'V', 20000; $len = pack 'V', 123
+45;;
$lelo lt $len && $lehi gt $len and print 'Works';;

[download]

The same thing for packed signed integers (but only works if the numbers are all positive or all negative):

$bello = pack 'l>', 10000; $belhi = pack 'l>', 20000; $beln = pack 'l>
+', 12345;;
$bello lt $beln && $belhi gt $beln and print 'Works';;
Works

$lello = pack 'l<', 10000; $lelhi = pack 'l<', 20000; $leln = pack 'l<
+', 12345;;
$lello lt $leln && $lelhi gt $leln and print 'Works';;

[download]
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In reply to Re: comparison of packed signed integers by BrowserUk
in thread comparison of packed signed integers by gerleu

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