Sandi Metz - Less - The Path to Better Design

gistfile1.rb

# Sandi Metz - Less - The Path to Better Design
# http://vimeo.com/26330100
# http://less-goruco.heroku.com/
#
# Abstractions are more stable than concretions.

class Trip
  attr_reader :bicycles, :customers, :vehicle
  
  def prepare(preparers)
    preparers.each {|preparer| preparer.prepare_trip(self)}
  end
end

class Mechanic
  def prepare_trip(trip)
    trip.bicycles.each {|bicycle| prepare_bicycle(bicycle)}
  end
end

class TripCoordinator
  def prepare_trip(trip)
    buy_food(trip.customers)
  end
end

class Driver
  def prepare_trip(trip)
    vehicle = trip.vehicle
    gas_up(vehicle)
    fill_water_tank(vehicle)
  end
end

Thanks for sharing!