The Command Pattern in Depth

Packaging commands as objects and sending them to a receiver enables a clean, loosely coupled design that’s easy to maintain.

The Decorator Pattern in Depth

Add functionality to a class without modifying it.

The State Pattern

Elegantly manage state transitions without large switches or numerous if statements.

The Visitor Design Pattern in Depth

Perform one or more operations on a collection of different data types without disrupting existing code.

The Proxy Pattern

A good solution when you need to enable or mediate access to objects, either local or remote