Mahmoud Abas, Full-Stack Software Engineer & AI

System Design & Design Patterns - Pattern Categories Overview

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Pattern Categories Overview

Creational, Structural, and Behavioral Patterns

Design Patterns

Creational

Singleton, Factory, Builder

Structural

Adapter, Decorator, Facade

Behavioral

Observer, Strategy, Command

Purpose

Creational Patterns: Deal with object creation mechanisms, creating objects in a manner suited to the situation.

How should this object come into existence?

Purpose

Structural Patterns: Deal with object composition and relationships between entities.

How should these objects be arranged or connected?

Purpose

Behavioral Patterns: Focused on communication between objects and the assignment of responsibilities.

How should these objects talk to each other?

Question	Category
Am I creating an object?	Creational
Am I composing, wrapping, or adapting objects?	Structural
Are objects communicating or collaborating?	Behavioral

Part 1

Creational Patterns deep dive

Part 2

Structural Patterns deep dive

Part 3

Behavioral Patterns deep dive

Case Study

Combining all three

Mahmoud AbasPattern Categories Overview

Question