Learn C++ Design Patterns
the fast way

All 22 classic patterns, rewritten to be quick to grasp: a one-sentence intent, a real-world analogy, and a short modern C++ example you can compile and run. No fluff.

Three families of patterns

Every classic pattern answers one of three questions.

Creational Patterns

How objects get made. These patterns hide the messy details of construction so your code never says new ConcreteThing() in a hundred places.

5 patterns →🧩

Structural Patterns

How objects fit together. These patterns compose classes and objects into bigger structures that stay flexible and cheap to change.

7 patterns →🔄

Behavioral Patterns

How objects talk to each other. These patterns untangle communication so responsibilities are clear and coupling stays low.

10 patterns →

All patterns

Jump straight to any pattern in the catalog.

Creational Patterns

Singleton One instance for the whole program, with one global access point.Factory Method Let subclasses decide which concrete object to create.Abstract Factory Create whole families of related objects that match each other.Builder Assemble complex objects step by step, skipping what you don't need.Prototype Clone existing objects without depending on their concrete classes.

Structural Patterns

Adapter Make two incompatible interfaces work together.Bridge Split one giant class hierarchy into two independent ones.Composite Treat single objects and whole trees of objects the same way.Decorator Stack new behavior onto an object by wrapping it.Facade One simple front door to a complicated subsystem.Flyweight Share the heavy, repeated data so millions of objects fit in RAM.Proxy A stand-in object that controls access to the real one.

Behavioral Patterns

Chain of Responsibility Pass a request along a chain until someone handles it.Command Turn an action into an object you can queue, log, and undo.Iterator Walk through a collection without knowing how it's stored.Mediator Stop objects talking to each other directly — route it through a hub.Memento Snapshot an object's state so you can restore it later.Observer Notify many objects automatically when one object changes.State Let an object change its behavior when its internal state changes.Strategy Swap an algorithm at runtime like changing a cartridge.Template Method Fix the skeleton of an algorithm, let subclasses fill in the steps.Visitor Add new operations to a class family without touching it.