Code examples of design patterns in various languages: C#, C++, Go, Java, PHP, Python, Ruby, Rust, Swift, TypeScript, and more.

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Mediator Lets you reduce chaotic dependencies between objects. The pattern restricts direct communications between the objects and forces them to collaborate only via a mediator object.

Full code example in Java with detailed comments and explanation. Singleton is a creational design pattern, which ensures that only one object of its kind exists and provides a single point of access to …

Full code example in Java with detailed comments and explanation. Builder is a creational design pattern, which allows constructing complex objects step by step.

Full code example in Java with detailed comments and explanation. Strategy is a behavioral design pattern that turns a set of behaviors into objects and makes them interchangeable inside original …

Adapter pattern in C++. Full code example in C++ with detailed comments and explanation. Adapter is a structural design pattern, which allows incompatible objects to collaborate.

Full code example in C++ with detailed comments and explanation. Abstract Factory is a creational design pattern, which solves the problem of creating entire product families without specifying their …

This example shows how a request containing user data passes a sequential chain of handlers that perform various things such as authentication, authorization, and validation.

Full code example in C++ with detailed comments and explanation. Prototype is a creational design pattern that allows cloning objects, even complex ones, without coupling to their specific classes.