CodeDev knowledge system / 28 chapters
DOCUMENT
DOCUMENT
THE WHOLE
SYSTEM.
A practical reference for programming, DSA, frameworks, databases, APIs, Linux, networking, testing, security, deployment, and the architecture behind CodeDev itself.
All documentation
28 / 28
Choose a chapter.
01 / Start here
Beginner → advanced
Developer learning roadmap
A practical order for learning programming, DSA, web development, databases, systems, testing, and production deployment.
↗
02 / Start here
Beginner
Programming fundamentals
The core ideas shared by nearly every programming language: data, control flow, functions, scope, errors, files, and program structure.
↗
03 / Languages
Beginner → intermediate
C and C++ guide
Core C/C++ syntax, memory, RAII, containers, references, pointers, and a path from procedural code to modern C++.
↗
04 / Languages
Beginner → intermediate
Java and object-oriented programming
Java syntax, classes, interfaces, collections, exceptions, and clean object-oriented design.
↗
05 / Languages
Beginner → intermediate
Python application development
Python fundamentals, type hints, modules, virtual environments, data structures, exceptions, and application organization.
↗
06 / Languages
Beginner → intermediate
JavaScript for modern applications
JavaScript fundamentals, DOM events, modules, async/await, fetch, validation, and browser security boundaries.
↗
07 / Languages
Intermediate
Kotlin and Android fundamentals
Kotlin syntax, null safety, coroutines, Android architecture, state, storage, networking, and lifecycle-aware code.
↗
08 / Languages
Intermediate
Rust and systems programming
Ownership, borrowing, Result/Option, Cargo, concurrency, and when Rust is useful in desktop or systems tools.
↗
09 / DSA + algorithms
Beginner → intermediate
DSA and Big-O foundations
How to choose data structures and reason about time/space complexity instead of memorizing implementations.
↗
10 / DSA + algorithms
Beginner
Arrays and linked lists
Static/dynamic arrays, vectors, nodes, singly linked lists, trade-offs, and practical implementation patterns.
↗
11 / DSA + algorithms
Beginner → intermediate
Stacks, queues, deques, and hash tables
The core structures behind undo, scheduling, traversal, caching, symbol lookup, and fast membership checks.
↗
12 / DSA + algorithms
Intermediate
Trees, heaps, and graphs
Hierarchical structures, priority queues, graph models, BFS/DFS, and how these structures map to real software problems.
↗
13 / DSA + algorithms
Intermediate
Searching, sorting, recursion, and dynamic programming
Binary search, sorting choices, recursion, memoization, and a disciplined approach to algorithm problems.
↗
14 / Web + frameworks
Beginner → intermediate
HTML, CSS, and responsive web foundations
Semantic HTML, accessible forms, CSS layout, responsive design, progressive enhancement, and browser fundamentals.
↗
15 / Web + frameworks
Intermediate
HTTP, REST APIs, and backend design
Requests, responses, status codes, JSON APIs, validation, idempotency, pagination, authentication, and API boundaries.
↗
16 / Web + frameworks
Intermediate
Flask and Django frameworks
How Flask and Django organize Python web applications, where each fits, and the production concerns both frameworks share.
↗
17 / Web + frameworks
Intermediate
React, Vue, and Svelte overview
Component-driven frontend architecture, state, routing, forms, API calls, and how to decide whether a frontend framework is necessary.
↗
18 / Data + backend
Intermediate
SQL, PostgreSQL, and Redis
Relational modeling, SQL queries, indexes, transactions, PostgreSQL production use, and Redis for shared ephemeral state.
↗
19 / Data + backend
Intermediate → advanced
Backend architecture and data integrity
Service boundaries, validation, transactions, migrations, concurrency, caching, and designing state changes that remain correct under failure.
↗
20 / Systems + delivery
Beginner → intermediate
Git and GitHub workflow
Commits, branches, pull requests, merge strategy, CI checks, and a clean release workflow.
↗
21 / Systems + delivery
Intermediate
Linux, networking, and Docker
Linux service basics, permissions, ports, IP addressing, sockets, reverse proxies, containers, and deployment troubleshooting.
↗
22 / Systems + delivery
Intermediate
Testing and debugging
Unit, integration, regression, security, migration, and deployment tests plus a systematic debugging method.
↗
23 / Systems + delivery
Intermediate → advanced
Application security essentials
Authentication, authorization, password hashing, MFA, CSRF, XSS, CSP, rate limiting, secrets, uploads, and secure production defaults.
↗
24 / CodeDev system
System reference
CodeDev system architecture
How the current CodeDev by Edward website is structured: Flask application factory, blueprints, templates, database, media storage, and public/admin boundaries.
↗
25 / CodeDev system
System reference
CodeDev database and data model
The current PostgreSQL/SQLAlchemy entities and the relationships that power projects, releases, media, leads, settings, analytics, users, and audit history.
↗
26 / CodeDev system
System reference
CodeDev authentication and Superadmin security
The private control-room security model: hidden route, strong passwords, TOTP MFA, recovery codes, lockouts, CSRF, session revocation, and authorization.
↗
27 / CodeDev system
System reference
CodeDev Superadmin, media, and analytics
How the control room edits projects/releases/settings, uploads durable Cloudinary media, and exposes privacy-light server-side analytics.
↗
28 / CodeDev system
System reference
CodeDev deployment and operations
Render/Docker production configuration, PostgreSQL, Cloudinary, Redis/Valkey, migrations, uptime monitoring, health checks, recovery, and deployment verification.
↗
Production referenceHOW CODEDEV