You're right, I'm not sure yet if I really need a hash. I'll have to figure out some of the details.

I also already started using the "not exists" part, but running into a problem with that: I want to move the setup of the dispatch table / array into a module, but in the module the "exists &{"tcid_$_"} always fails as the sub is not defined in this module. Is there a good workaround for this?