| 34.Design Pattern |
| 34.1.Singleton( 5 ) | 34.11.Facade Pattern( 2 ) |
| 34.2.Observable and Observer( 6 ) | 34.12.Factory Pattern( 2 ) |
| 34.3.Abstract Factory Pattern( 1 ) | 34.13.Iterator Pattern( 1 ) |
| 34.4.Adapter Pattern( 3 ) | 34.14.Mediator Pattern( 1 ) |
| 34.5.Bridge Pattern( 1 ) | 34.15.Prototype Pattern( 1 ) |
| 34.6.Builder Pattern( 3 ) | 34.16.Proxy Pattern( 3 ) |
| 34.7.Chain of Responsibility Patterns( 3 ) | 34.17.State Pattern( 2 ) |
| 34.8.Command Pattern( 2 ) | 34.18.Strategy Pattern( 2 ) |
| 34.9.Composite Pattern( 1 ) | 34.19.Template Pattern( 2 ) |
| 34.10.Decorator Pattern( 3 ) | 34.20.Visitor Pattern( 2 ) |