Or even 
my %p;
undef @p{ @q } if @q;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^3: Two simple code style advice questions by choroba
in thread Two simple code style advice questions by eyepopslikeamosquito

Title:
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and:  <code> code here </code>
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