Ruby Mixins

readme.md

Hey, look at me!

This is a small little module demonstrating Ruby mixins with modules.

How to Use

Don't use this gist, actually.. Not using it is that easy!

apartment.rb

class Apartment < Dwelling
  include Holder

  attr_accessor :rent
  
  def initialize(address, rent, roommate_capacity)
    super(address)
    @rent = rent
    set_capacity(roommate_capacity)
  end
  
  def roommates
    holdables
  end
  
  def add_roommate(occupant)
    add_holdable(occupant)
  end
end

dwelling.rb

class Dwelling
  attr_reader :address

  def initialize(address)
    @address = address
  end
end

holder.rb

module Holder
  def set_capacity(capacity)
    @capacity = capacity
  end
  
  def full?
    holdables.size >= capacity
  end
  
  private
  
  attr_reader :capacity
  
  def holdables
    @holdables ||= []
  end
  
  def add_holdable(holdable)
    holdables << holdable
  end
end

truck.rb

class Truck
  include Holder
  
  def initialize(box_capacity)
    set_capacity(box_capacity)
  end
  
  def boxes
    holdables
  end
  
  def add_box(box)
    add_holdable(box)
  end
end