in reply to Re^4: Effeciency of key-only hash
in thread Effecicncy of key-only hash

++
You have a wonderful point there.
In my mind, personally, I associate sets with hashes of undef, so I get to see easily if an exists is missing, but I can see others letting it go.
[]s, HTH, Massa (κς,πμ,πλ)

In Section Seekers of Perl Wisdom