# The Codex Coding — thecodex.expert/coding/
# Free programming university — 11 languages, structured learning, official sources

## What this site covers
- 11 programming languages with deep-dive reference pages and structured Learn tracks
- 150 code snippets across all languages (copy-ready, idiomatic)
- Side-by-side syntax comparison (18 concepts, 11 languages)
- Guided learning paths by goal (web, mobile, systems, data)
- Software engineering: design patterns, testing, architecture
- Language history (1957 to present)

## Languages covered
Python, JavaScript, Java, TypeScript, Go, Rust, C++, Kotlin, Swift, SQL, C

## Key entry points
/coding/                     — Hub with all sections
/coding/languages/           — All 11 language overviews
/coding/compare/             — Side-by-side syntax across 11 languages
/coding/snippets/            — 150 idiomatic code snippets
/coding/start-here/          — Goal-based learning paths
/coding/learn/               — Structured courses per language
/coding/software-engineering/— Design patterns, testing, architecture
/coding/history/             — History of programming languages
/coding/concepts/            — CS concepts, data structures, algorithms
/coding/foundations/         — How computers work (binary, CPU, memory)
/coding/projects/            — 14 guided projects (Python, JS, Go, Rust)
/coding/playground/          — In-browser code playgrounds: JS, Python, SQL — all live
/coding/playground/javascript/ — Run JavaScript in the browser, no install
/coding/playground/python/   — Run real Python 3.12 in the browser via Pyodide (WASM)
/coding/playground/sql/      — Run real SQLite SQL in the browser via sql.js (WASM)
/coding/contact/             — Contact: hello@thecodex.expert

## Per-language deep dives (example: Python)
/coding/languages/python/                     — Python overview
/coding/languages/python/functions-and-closures/ — Functions deep dive
/coding/languages/python/oop-and-dataclasses/    — OOP deep dive
/coding/languages/python/async-and-concurrency/  — Async deep dive
/coding/learn/python/                           — Python course hub
/coding/learn/python/foundations/               — Python foundations track
/coding/snippets/python/                        — Python snippets

## Site principles
- All content sourced from official specifications (ISO standards, language docs)
- Source confidence rated: High / Medium / Low
- Every page shows primary source and last-verified date
- Free forever. No accounts. No ads. No paywalls.
- Owner: The Codex, Mumbai, India — hello@thecodex.expert

# Language Hubs (S62)
/coding/python/ — Python language hub: learning paths, reference, stdlib, projects, snippets, playground
/coding/javascript/ — JavaScript language hub: learning paths, reference, playground, snippets
/coding/typescript/ — TypeScript language hub: types, interfaces, generics, utility types
/coding/java/ — Java language hub: OOP, collections, generics, streams, concurrency
/coding/go/ — Go language hub: goroutines, channels, interfaces, stdlib
/coding/rust/ — Rust language hub: ownership, borrowing, traits, concurrency
/coding/kotlin/ — Kotlin language hub: null safety, coroutines, data classes
/coding/swift/ — Swift language hub: optionals, protocols, ARC, concurrency
/coding/sql/ — SQL language hub: querying, joins, window functions, indexes
/coding/c/ — C language hub: pointers, memory, structs, undefined behaviour
/coding/cpp/ — C++ language hub: RAII, templates, STL, modern C++

# Search (S62)
/coding/search/ — Full-text search across 215+ pages
/coding/search-index.json — Machine-readable page index for search

# Glossary (S61)
/coding/glossary/ — 80 programming terms, plain English definitions, Python examples

# DevOps & Tooling (S65)
/coding/devops/ — Git, command line, Docker, CI/CD — every developer needs these

# Python Reference — complete topic set (S67, all sourced from docs.python.org and PEPs)
/coding/languages/python/variables-and-types/ — built-in types, mutability, operators
/coding/languages/python/control-flow/ — if/elif/else, for, while, match
/coding/languages/python/comprehensions/ — list/dict/set/generator comprehensions (Lang Ref 6.2.4)
/coding/languages/python/functions-and-scope/ — def, args, closures, decorators, LEGB
/coding/languages/python/oop/ — classes, inheritance, dataclasses, dunder methods
/coding/languages/python/error-handling/ — try/except/finally, custom exceptions, context managers
/coding/languages/python/file-io/ — open(), modes, text vs binary, encodings, io module
/coding/languages/python/modules-and-packages/ — import system, __init__.py, pip, venv (Lang Ref 5)
/coding/languages/python/type-hints/ — annotations, Optional/Union, generics, Protocols (PEP 484/526/544)
/coding/languages/python/concurrency/ — threading, multiprocessing, asyncio, the GIL (PEP 703)
/coding/languages/python/testing/ — unittest, pytest, fixtures, mocking (unittest.mock)
/coding/languages/python/standard-library/ — 11 module deep-dives (os, sys, json, re, etc.)