in reply to Why does testing for the existence of hash keys create the keys ?
... Why?
Autovivification check this Understand autovivification
If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me
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Seekers of Perl Wisdom