Although you give examples of strange code and it does not pretend to be good, I can't resist pointing that:

code block given to sort must behave (as POD stays.)
Namely, once f(a,b) return false f(b,a) must return true.
Some versions of perl dumped core when fed some misbehaving comparision sub.
Such core dumps were fixed, but general rule remain: comparision sub must behave

This means that sort {rand(5) <=> rand(5)} is obviously wrong, but sort {1} also not good.

Best regards,
Courage, the Cowardly Dog

In reply to Re^4: Pearls (not really) of Perl programming by Courage
in thread Pearls (not really) of Perl programming by PetaMem

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