recreation_centre_expanded.rb

# recreation_centre_expanded.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; end

class RecreationCentre < CityPark
  attr_reader :philanthropist
  
  include Swimmable

  @@num_rec_centres = 0

  def initialize(name, num_trees, philanthropist)
    super(name, num_trees)
    @philanthropist = philanthropist
    @@num_rec_centres += 1
  end

  def whats_this
    self
  end

  def self.num_rec_centres
    @@num_rec_centres
  end
end

class Forest < GreenSpace; end

class Lake < Forest
  include Swimmable
end

dufferin_park = CityPark.new("Dufferin Park", 2000)
wallace_emerson = RecreationCentre.new("Wallace Emerson", 2, "Joe Beef")
scadding_court = RecreationCentre.new("DunBat", 25, "Jim Balsillie")


RecreationCentre.num_rec_centres # => 2
scadding_court.name # => "DunBat"
scadding_court.name = "Scadding Court"
scadding_court.name # => "Scadding Court"
scadding_court.whats_this # => #<RecreationCentre:0x00007fc73b9a0060 @name="Scadding Court", @num_trees=25, @philanthropist="Jim Balsillie">