| 28.Design Patterns | ||
| 28.1.Singleton Pattern( 2 ) | 28.7.Observer Pattern( 1 ) | |
| 28.2.Factory Pattern( 3 ) | 28.8.Strategy Pattern( 1 ) | |
| 28.3.Observer Pattern( 1 ) | 28.9.Template Pattern( 1 ) | |
| 28.4.Adapter Pattern( 1 ) | 28.10.Chain Responsibility( 1 ) | |
| 28.5.Facade Pattern( 1 ) | 28.11.Bridge Pattern( 1 ) | |
| 28.6.MVC Pattern( 1 ) | 28.12.Decorator Pattern( 1 ) | |