recreation_centre_last_example.rb

# recreation_centre_last_example.rb

module Swimmable
  def swim
    "Can swim here!"
  end
end

class GreenSpace
  attr_accessor :name, :num_trees
  
  def initialize(name, num_trees) 
    @name = name
    @num_trees = num_trees
  end
end

class CityPark < GreenSpace
  attr_accessor :rec_centre
end

class RecreationCentre
  attr_reader :philanthropist
  attr_accessor :name
  
  include Swimmable

  def initialize(name, philanthropist)
    @name = name
    @philanthropist = philanthropist
  end

  def to_s
    name
  end

  def whats_this
    self
  end
end

class Forest < GreenSpace; end

class Lake < Forest
  include Swimmable
end

alexandria_park = CityPark.new("Alexandria Park", 2500)
wallace_emerson = RecreationCentre.new("Wallace Emerson", "Joe Beef")
scadding_court = RecreationCentre.new("DunBat", "Jim Balsillie")


scadding_court.name # => "DunBat"
scadding_court.name = "Scadding Court"
scadding_court.name # => "Scadding Court"
scadding_court.whats_this # => #<RecreationCentre:0x00007fc73b9a0060 @name="Scadding Court", @philanthropist="Jim Balsillie">
alexandria_park.rec_centre = scadding_court
puts alexandria_park.rec_centre # Scadding Court (because of our polymorphic new to_s method)