newRPL - build 1255 released! [updated to 1299]

[Claudio L.]

Aha, thoughts converging into something.
The dictionary-lists or lua tables would allow you to assign a multiplicity to a numeric key, so it's a good container for what you want to achieve with multi sets. From there it's just a matter of defining sets commands to do the operations. Not sure about using overloadable operators (to keep the tables generic), but specific commands would work (much like it works now for binary integers, BADD, BSUB, etc operating over an existing generic type).