undef(@hash{qw(shave the modern way)});
Do @hash{qw(shave the modern way)}=(); instead. It's arguably a bug that the former creates the shave, the, and modern keys if they don't exist. Note that it does not set their values to undef if they do already exist.
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In reply to Re^2: Effecicncy of key-only hash by ysth
in thread Effecicncy of key-only hash by brycen

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