in fact, Perl does what we tell to do, and is difficult to spot some valid Perl code that was not what we intended,but it still compile.
The tricky part is that, contrarly to what i remembered, the sort sub must not returns -1 or 0 or +1, but:returns an integer less than, equal to, or greater than 0 so all the subtractions of octets are valid return value when choosing if $a or $b must be returned.

L*
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

In reply to Re^2: Problem with a sort result by Discipulus
in thread Problem with a sort result by kzwix

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