Re^8: Using hashes for set operations...

[LanX]

in reply to Re^7: Using hashes for set operations...
in thread Using hashes for set operations...

However, this claim would imply that stringification defines a bijection between objects and their hash keys.

Ergo, hash keys are all you need! ;-)

in theory yes, practically no.

There is no pure perl way to get the ref from the stringification, as long the relation is stored in a hash (sic).

And yes collisions can happen, when strings and references are mixed into one set...then resulting into the need of a specialized stringification.