How classes and objects are composed to form larger structures. Adapter, Decorator , Bridge How objects communicate and distribute responsibility. Strategy, Observer, Command Reader Perspectives
: While authoritative, some modern reviewers find it dense. Beginners often recommend starting with Head First Design Patterns on Quora as a more approachable introduction before diving into the GoF original. Design Patterns Elements of Reusable Object-Ori...
: It shifted the focus from writing code to designing systems with "distilled knowledge" of object-oriented techniques. How classes and objects are composed to form