gistfile1.rb

class ChangeDispenser
  attr_reader :purse

  MONEY_TO_VALUE = {
    quarter: 25, 
    dime: 10, 
    nickel: 5, 
    penny: 1
  }

  def initialize
    @purse = Hash.new(0)
  end

  def add_cents(cents)
    MONEY_TO_VALUE.each do |coin, value|
      coin_qty = cents / value
      
      @purse[coin] += coin_qty
      cents -= (coin_qty * value)
    end
  end

  def dispense
    # Dispensing should clear the purse not just return the calculcated change everytime.
    # One way to do that is to copy the value of @purse and then clear the purse
    # Other way is to try the Hook gem to act as a callback. (haven't tried this yet.)
    
    change = @purse.clone
    @purse.clear
    change
  end
end