I've got an easy Set problem. I have two lists of objects and I want intersection and difference, etc.

BUT I'd like to have them be compared by calling $_->id rather than refaddr $_. I don't think either Set::Object or Set::Scalar allow the user to provide an identity comparison function, or make clear how to subclass to change identity comparison.

Am I missing it, or is there another module that allows this? It seems like a common need.

thanks

update: edited for clarity