spanuska

class ChangeDispenserCashregister

	attr_accessor :total, :payment, :change_to_dispense
	
	COINS = { quarter: 25, dime: 10, nickel: 5, penny: 1 }
	
	def initialize
		get_total
		get_payment

spanuska

class	Interpolater

	attr_accessor :data, :template

	def initialize(template, data)
		@template = template
		@data = data

		replace_bracketed_words
	end

spanuska

class Member
  attr_accessor :username, :streak_dates
  
  def initialize(username)
    @username = username
    @streak_dates = []
  end

  def practice
    self.streak_dates << Date.today unless self.streak_dates.include?(Date.today)

spanuska

class Streak
  attr_accessor :username, :streak_dates
  
  def initialize
    @streak_dates = []
  end

  def extend_streak
    self.streak_dates << Date.today unless self.streak_dates.include?(Date.today)
  end

spanuska

class Book
  attr_accessor :title, :author
  def initialize(args)
    args = defaults.merge(args)
    @title = args[:title]
    ...
  end
	
  def store_book
    # logic for storing the book at a location on the shelf 

spanuska

class Shelf
  ...
  def store(@book)
    # logic to find the correct location on itself for @book
  end
end

class Book
  attr_accessor :title, :author
  def initialize(args)

spanuska

class Shelf
  ...
  def store(book)
    length = book.length
    width = book.width
    depth = book.depth
    # logic to find the nearest spot that can accomodate the given dimensions
  end
end

spanuska

class Book
  ....
  def initialize(args)
    args = defaults.merge(args) # If you're using Ruby <2.0, this is the way to go.
    @title = args[:title]
    @author = args[:author]
  end
  def defaults
    {title: "Unknown", author: "Unknown"}
  end

spanuska

class Book
  ....
  def initialize(title: 'Unknown', author: 'Unknown') # This is the Ruby >= 2.0 syntax.
    @title = title
    @author = author
  end
end

spanuska

class Shelf # without the wrapper
  ...
  def store(book)
    # imagine complicated logic here...
    intermediate_result = book.storage_requirements / self.capacity
    # imagine more complicated logic...
  end
end

class Shelf # with wrapper