Head First Design Patterns: A Brain-Friendly Guide by Eric Freeman, Elisabeth Robson, Bert Bates and Kathy Sierra

These are my C++ implementations of all the exercises in Head First Design Pattern I did them for my own learning. I hope that they will be useful to someone else.

Please let me know if you found a mistake or a bug.

Cheers!

NOTE: stay tune for the rest of the patterns

Contents

• Chapter 1. Strategy
• Chapter 2. Observer
  • Weather-O-Rama: push model
  • Weather-O-Rama: pull model
• Chapter 3. Decorator
  • starBuzz Coffee Shop
• Chapter 4. Factory
  • Simple Factory
  • The Factory Method
  • Abstract Factory
• Chapter 5. Singleton
  • Classic Singleton
  • Chocolate Boiler
  • Thread Safe:
    • Synchronized
    • Eagerly created instance
    • Double-checked lock
    • Subclassed
• Chapter 6. Command
  • Simple Remote Control
  • Remote Control
  • Remote Control with undo
  • Remote Control Party Macros
  • Dinner Order using lambda function
• Chapter 7. Adapter and Facade
  • Adapter
    • Object Adapter
    • Class Adapter
  • Facade
• Chapter 8. Template Method
  • Barista: Coffee and Tea
  • sort
• Chapter 9. Iterator and Composite
  • Iterator
    • Diner Merger
    • Diner Merger - built-in Java Iterator
    • Diner/Cafe Merger
  • Composite
    • Menu
    • Menu Iterator
• Chapter 10. State
  • Gumball Machine - without state pattern
  • Gumball Machine - with state pattern
  • Gumball Machine - with Winner State