最病 A Pattern Categories ll -Scope 口 Object Patterns a Describe relationships between objects and are primarily defined y com position. a Relationships in object patterns are typically created at runtime and are more dynamic and flexible Composite Visitor Decorator Iterator Command Proxy Strategy Facade Observer Chain of Responsibility Prototype Flyweight Mediator Bridge State Builder Memento Singleton Abstract Factory Institute of Computer Software 2021/2/7 Nanjing UniversityPattern Categories II -- Scope  Object Patterns  Describe relationships between objects and are primarily defined by composition.  Relationships in object patterns are typically created at runtime and are more dynamic and flexible 2021/2/7 Institute of Computer Software Nanjing University 15 Composite Visitor Decorator Iterator Command Memento Proxy Facade Observer Chain of Responsibility Builder Singleton Prototype Flyweight Mediator Bridge State Abstract Factory Strategy