Decorator pattern for adding responsibilities to objects without modifying their existing code.

🧩 Java samples for a popular design pattern.

Repo with examples and short description regarding the most popular behavioral patterns

Define a family of algorithms, put each of them in a separate class, and make their objects interchangeable

Use different types of iterators to iterate through different types of complex data structures

Add new operations to existing object without modifying the existing objects.

C# patterns

A simple finite state machine written in Java.

Behavioral patterns on Swift

Implementation Examples And Notes on Gang Of Four Design Patterns

Python Design Patterns

Java Design Patterns