Design Patterns: Behavioral

Overview

Behavioral patterns address how objects communicate and distribute responsibility. They replace tangled conditional logic, tight coupling, and ad-hoc event wiring with well-named structures. Recognizing which pattern is — or should be — present is a core code review skill.

When to Use

• Large switch/if-else blocks branching on type or state
• Tightly coupled objects calling each other in every direction
• Duplicated algorithm logic with only small steps varying
• Event/notification systems needing correctness and scalability review

Quick Reference