Constants example

example.rb

module Employees
  BASE_SALARY = 4000
  
  class GarbageCollector
    def self.salary
      BASE_SALARY + 200
    end
  end
  
  class Marketer
    def self.salary
      BASE_SALARY + 400
    end
  end
end

Employees::GarbageCollector.salary # 4200
Employees::Marketer.salary # 4400
Employees::BASE_SALARY # 4000