overview_demo.rb

class Sandwich
end

class GrilledCheeseMaker
  def initialize(bottom_substrate, top_substrate, cheese_type, cook_type)
    @bottom_substrate = bottom_substrate
    @top_substrate = top_substrate
    @cheese_type = cheese_type
    @cook_type = cook_type

    make_sandwich!
  end 

  def make_sandwich!
    puts "Getting #{@bottom_substrate} of bread"
    puts "Getting #{@top_substrate} of bread"
    puts "Getting some #{@cheese_type}"

    puts "Putting #{@cheese_type} on #{@bottom_substrate}"
    puts "Putting #{@top_substrate} on half-completed cold sandwich"

    puts "Putting a #{@cook_type} on the sandwich"
  end 
end

GrilledCheeseMaker.new('wheat', 'wheat', 'gruyere', 'wicked scorch')

overview_demo2.rb

class Sandwich
end

class GrilledCheeseMaker
  def initialize(bottom_substrate, top_substrate, cheese_type, cook_type)
    @bottom_substrate = bottom_substrate
    @top_substrate = top_substrate
    @cheese_type = cheese_type
    @cook_type = cook_type

    make_sandwich!
  end

  def make_sandwich!
    get_items
    arrange_items
    cook_sandwich
  end

  private

    def get_items
      puts "Getting #{@bottom_substrate} of bread"
      puts "Getting #{@top_substrate} of bread"
      puts "Getting some #{@cheese_type}"
    end

    def arrange_items
      puts "Putting #{@cheese_type} on #{@bottom_substrate}"
      puts "Putting #{@top_substrate} on half-completed cold sandwich"
    end

    def cook_sandwich
      puts "Putting a #{@cook_type} on the sandwich"
    end

end

GrilledCheeseMaker.new('wheat', 'wheat', 'gruyere', 'wicked scorch')


=begin rdoc

## Why is this better?

* We've provided 3 debug domains by doing this (is the issue in item fetching,
  preparation, or cooking?)
* By doing so these methods can easily be moved (Refactoring: Move Method) and
  re-homed onto the `Sandwich` class
* Is this fully-factored into proper objects?  **NO**.  But we are offering a
  way of attacking complexity thaty easily segueywas into discussions around:
  * inversion of control
  * dependency injection
  * means for scaling to complexity
=end