Which of these approachs autovivifies a hash entry? I know from the exists docs that the exists test won't autovivify. I'm pretty sure the last test will autovivify. I'm not sure about defined, though.

In reply to Re^2: Hashing it out: defined? exists? by Nkuvu
in thread Hashing it out: defined? exists? by eff_i_g

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