Module include: Real world example

include_example.rb

module Logging
  def log(level, message)
    File.open("log.txt", "a") { |f| f.write "#{level}: #{message}" }
  end
end

class Service
  include Logging
  
  def do_something
    begin
      # do something
    rescue StandardError => e
      log(:error, e.message)
    end
  end
end