Add or replace class methods?

[Thalassicus]

Is it possible to add to or replace methods of the built-in classes?

 

[Pazyryk]

These are just Lua metatables, right? Should be possible from the Lua perspective, unless they were put off limits.

 

[Thalassicus]

I tried doing so a few months ago but couldn't figure out how. If anyone knows, it would be helpful. For example... changing a function like shown below.

function City_GetNumBuildingClass(city, buildingClass)
  return City_GetNumBuilding(city, Player_GetUniqueBuildingID(Players[city:GetOwner()], buildingClass))
end

It's a small difference, but would make the code more organized for each of those functions to be a part of their respective classes. I just can't figure out how.

City_GetNumBuildingClass(city, buildingClass)
|
v
city:GetNumBuildingClass(buildingClass)