OOP Inheritance Example

local function Vehicle(wheelNum)
  local Vehicle = {}
  Vehicle.__wheelNum = wheelNum

  function Vehicle:getWheelNum()
    return self.__wheelNum
  end

  return Vehicle
end

local function Car(model)
  local Car = Vehicle(4)
  Car.__model = model

  function Car:getModel()
    return self.__model
  end

  return Car
end

local newCar = Car('toYODA')

print(newCar:getWheelNum())
print(newCar:getModel())