Post: "The method_missing() Chainsaw"

before_method_missing_1.rb

class InformationDesk
  def emergency
    # Call emergency...
    "emergency() called"
  end
  
  def flights
    # Provide flight information...
    "flights() called"
  end
  
  def local_transports
    # Return a metro map...
    "local_transports() called"
  end
  
  def hotels
    # Find a suitable hotel...
    "hotels() called"
  end
  
  # ...even more methods
end

before_method_missing_2.rb

class DoNotDisturb
  def initialize
    @desk = InformationDesk.new
  end
  
  def check_lunch_break
    hour = Time.now.hour
    raise "Out for lunch" if hour >= 12 && hour < 14
  end
  
  def emergency
    @desk.emergency
  end
  
  def flights
    check_lunch_break
    @desk.flights
  end
  
  def local_transports
    check_lunch_break
    @desk.local_transports
  end
  
  def hotels
    check_lunch_break
    @desk.hotels
  end

  # ...and more methods to match the remaining methods in InformationDesk
end

# At 12:30...
DoNotDisturb.new.emergency # => "emergency() called"
DoNotDisturb.new.flights   # ~> -:32:in `check_lunch_break': Out for lunch (RuntimeError)