http://www.perlmonks.org?node_id=656970


in reply to Re^3: Object method prototypes?
in thread Object method prototypes?

what's worse than copying the hash is having the called method (or another it calls) impolitely muck with your hashref by deleting or adding keys for its own purposes.

next thing you know, you find yourself making a copy anyway so you can send an anon ref to that instead..