Dashboard Library Review2134 Progress Certificates

Computer Science Foundations

Programming Languages

JavaScript Fundamentals0/24

Core CS Theory

Data structures & algorithms0/23

OOP & design patterns0/23

Functional Programming Concepts0/20

Operating Systems Fundamentals0/20

Engineering Practice

Software Engineering Fundamentals0/20

Networking Fundamentals0/20

Linux & the Command Line0/20

Frontend Engineering

React & Next.js0/18

CSS & Modern Styling0/18

UI/UX for Developers0/12

Mobile Development0/12

Backend Engineering

Core Backend

Node.js & Backend JavaScript0/18

Databases & SQL0/16

Engineering Practice

Git & Version Control0/14

Testing & QA0/18

Security

Cryptography Fundamentals0/12

Auth, Authorization & Multi-Tenancy0/17

Web Security Fundamentals0/18

Application Security & Secure Coding0/12

Cloud, Infrastructure & DevOps

Cloud Platforms

Cloud Computing & Infrastructure0/19

Containers & Orchestration

Docker & Containers0/12

Delivery & Operations

CI/CD & Deployment Pipelines0/12

Observability & Monitoring0/12

Deployment Platforms

Domain Names, DNS & Subdomains0/12

Systems & Architecture

System design & architecture0/18

Distributed Systems Fundamentals0/12

Message Queues & Event-Driven Architecture0/12

Caching Strategies0/12

AI & Machine Learning

AI & ML Fundamentals0/12

AI Agents & LLM Integration0/17

Platform & Product Integrations

WhatsApp & Meta Platform Integrations0/19

Payments & Financial Systems0/12

Process, Career & Delivery

Agile & Project Management0/14

Interviewing & Career Growth0/12

Built by Mohamed Salem

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Dashboard Library Review2134 Progress Certs

OOP & design patterns

SOLID, composition over inheritance, and the patterns worth recognizing in real code.

23 lessons

Study 86 cards for this domain

Beginner

Classes and objects — the basicsBeginner3 min read·Not started Inheritance — the basicsBeginner3 min read·Not started The four pillars of OOP, actually explainedBeginner3 min read·Not started Static vs. instance methods — the basicsBeginner3 min read·Not started Interfaces and abstract classes — the basicsBeginner3 min read·Not started What is a design pattern, actually?Beginner3 min read·Not started

Intermediate

SOLID, from the problems it actually solvesIntermediate4 min read·Not started Composition over inheritanceIntermediate2 min read·Not started The Strategy pattern — Open/Closed in practiceIntermediate3 min read·Not started The Observer pattern — decoupling 'what happened' from 'who cares'Intermediate3 min read·Not started The Factory pattern — deciding which class to instantiateIntermediate3 min read·Not started The Singleton pattern — and why it's controversialIntermediate4 min read·Not started The Builder pattern — constructing complex objects step by stepIntermediate4 min read·Not started The Adapter pattern — making incompatible interfaces work togetherIntermediate4 min read·Not started The Facade pattern — one simple interface over a complicated subsystemIntermediate4 min read·Not started The Template Method pattern — fixing the steps, varying the detailsIntermediate4 min read·Not started The Command pattern — turning a request into an object you can store and pass aroundIntermediate3 min read·Not started The State pattern — an object that genuinely behaves differently depending on its stateIntermediate3 min read·Not started Chain of Responsibility — passing a request along a line of handlersIntermediate3 min read·Not started The Proxy pattern — a stand-in that controls access to the real objectIntermediate3 min read·Not started The Prototype pattern — creating new objects by copying an existing oneIntermediate3 min read·Not started

Advanced

The Decorator pattern — wrapping behavior at runtimeAdvanced3 min read·Not started Common OOP anti-patterns and code smells — a field referenceAdvanced4 min read·Not started