When building complex software systems, writing code that simply "works" is not enough. As systems scale and requirements evolve, poorly structured object creation, tight coupling, hardcoded control flows, and static inheritance hierarchies lead to fragile architectures.
This comprehensive guide breaks down five essential design patterns—Abstract Factory, Strategy, Adapter, Observer, and Decorator—with real-world enterprise scenarios, anti-patterns, trade-offs, and refactoring step-by-steps.
Pattern
Category
Core Intent
