Message Passing System?

[Inny]

I think inni meant ruffian.signal.send( "zomg" ).

Correct, I accidentally used the wrong syntax when typing up the example.

Nevertheless, it is possible to create a "callable" table in Lua using metatables. That's probably what he meant with "(or which metatables)".

The "with metatables" part means that instead of the closure I used, which could be very memory inefficient, I could stuff the binding information in a table and do magic with the metatable. This code of mine demonstrates how I generally do callbacks in a space efficient way:
https://github.com/inmatarian/landofway ... l.lua#L262