developer-delphi-patterns-behavioral

To implement the Observer pattern in Delphi, use an IObserver interface to define update methods, allowing subject objects to notify registered listeners of state changes for decoupled event notification. The included PAS files demonstrate this structure.

The best way to add Undo support in Delphi is using an ICommand interface that defines both Execute and Undo methods, encapsulating reversible actions as objects. The provided PAS examples demonstrate this pattern for hands-on experimentation.

To use the Strategy pattern in Delphi, define interchangeable algorithms behind a common interface, enabling runtime selection and improved decoupling. The skill provides concrete PAS files demonstrating this for hands-on scenarios.

Yes, Delphi behavioral design patterns like Mediator and State are specifically suited for UI coordination and state-driven behavior. The skill includes PAS examples demonstrating these patterns to improve flexibility and maintainability.

Use the Chain of Responsibility pattern in Delphi for pipeline processing where requests pass sequentially through handlers, whereas the Mediator pattern centralizes UI coordination. The skill provides PAS examples to guide pattern selection.

To create a custom Iterator in Delphi, implement an interface defining traversal methods to access elements sequentially without exposing the underlying structure. The skill provides concrete PAS examples demonstrating custom iteration.