Brief overview of NoSQL databases and the spectrum of schema, along with a very basic implementation of a NoSQL database using the Crystal programming language.

In 2 lists

Go: Build Your Own Database from Scratch: From B+Tree To SQL in 3000 Lines

by James Smith

In 2 lists

Go: Code a database in 45 steps: a series of test-driven small coding puzzles

Go: Build Your Own Redis from Scratch

JavaScript: Dagoba: an in-memory graph database

Python: DBDB: Dog Bed Database

Python: Write your own miniature Redis with Python

Ruby: Build your own fast, persistent KV store in Ruby

Rust: Build your own Redis client and server

C: Linux containers in 500 lines of code

Go: Build Your Own Container Using Less than 100 Lines of Go

Go: Building a container from scratch in Go

[video]

Python: A workshop on Linux containers: Rebuild Docker from Scratch

Python: A proof-of-concept imitation of Docker, written in 100% Python

Shell: Docker implemented in around 100 lines of bash

Docker implemented in around 100 lines of bash.

In 5 listsDetails

C: Home-grown bytecode interpreters

C: Virtual machine in C

C: Write your Own Virtual Machine

by Justin Meiners and Ryan Pendleton

In 3 lists

C: Writing a Game Boy emulator, Cinoop

In 2 lists

C++: How to write an emulator (CHIP-8 interpreter)

A guide to developing a CHIP-8 interpreter in C/C++.

In 2 lists

C++: Emulation tutorial (CHIP-8 interpreter)

C++: Emulation tutorial (GameBoy emulator)

Another series of posts documenting the building of an emulator.

In 2 lists

C++: Emulation tutorial (Master System emulator)

C++: NES Emulator From Scratch

[video]

Common Lisp: CHIP-8 in Common Lisp

JavaScript: GameBoy Emulation in JavaScript

Python: Emulation Basics: Write your own Chip 8 Emulator/Interpreter

Rust: 0dmg: Learning Rust by building a partial Game Boy emulator

JavaScript: WTF is JSX (Let's Build a JSX Renderer)

JavaScript: A DIY guide to build your own React

JavaScript: Building React From Scratch

[video]

JavaScript: Gooact: React in 160 lines of JavaScript

JavaScript: Learn how React Reconciler package works by building your own lightweight React DOM

JavaScript: Build Yourself a Redux

JavaScript: Let’s Write Redux!

JavaScript: Redux: Implementing Store from Scratch

[video]

JavaScript: Build Your own Simplified AngularJS in 200 Lines of JavaScript

JavaScript: Make Your Own AngularJS

JavaScript: How to write your own Virtual DOM

JavaScript: Building a frontend framework, from scratch, with components (templating, state, VDOM)

JavaScript: Build your own React

In 2 lists

JavaScript: Building a Custom React Renderer

[video]

C: Handmade Hero

Videos on making a game from start to finish, source code for $15.

In 4 lists

C: How to Program an NES game in C

C: Chess Engine In C

[video]

C: Let's Make: Dangerous Dave

[video]

C: Learn Video Game Programming in C

[video]

C: Coding A Sudoku Solver in C

[video]

C: Coding a Rogue/Nethack RPG in C

[video]

C: On Tetris and Reimplementation

C++: Breakout

C++: Beginning Game Programming v2.0

C++: Tetris tutorial in C++ platform independent focused in game logic for beginners

C++: Remaking Cavestory in C++

[video]

C++: Reconstructing Cave Story

[video]

C++: Space Invaders from Scratch

C#: Learn C# by Building a Simple RPG

C#: Creating a Roguelike Game in C#

C#: Build a C#/WPF RPG

Go: Games With Go

[video]

Java: Code a 2D Game Engine using Java - Full Course for Beginners

[video]

Java: 3D Game Development with LWJGL 3

JavaScript: 2D breakout game using Phaser

JavaScript: How to Make Flappy Bird in HTML5 With Phaser

JavaScript: Developing Games with React, Redux, and SVG

JavaScript: Build your own 8-Ball Pool game from scratch

[video]

JavaScript: How to Make Your First Roguelike

JavaScript: Think like a programmer: How to build Snake using only JavaScript, HTML & CSS

Lua: BYTEPATH

Python: Developing Games With PyGame

Python: Making Games with Python & Pygame

[pdf]

Python: Roguelike Tutorial Revised

Ruby: Developing Games With Ruby

Ruby: Ruby Snake

Rust: Adventures in Rust: A Basic 2D Game

Rust: Roguelike Tutorial in Rust + tcod

Haskell: Reimplementing “git clone” in Haskell from the bottom up

JavaScript: Gitlet

JavaScript: Build GIT - Learn GIT

Python: Just enough of a Git client to create a repo, commit, and push itself to GitHub

Python: Write yourself a Git!

Python: ugit: Learn Git Internals by Building Git Yourself

Ruby: Rebuilding Git in Ruby

C: Malloc is not magic -- Implementing your own memory allocator

C: Beej's Guide to Network Programming

In 2 lists

C: Let's code a TCP/IP stack

C / Python: Build your own VPN/Virtual Switch

Ruby: How to build a network stack in Ruby

C#: Neural Network OCR

F#: Building Neural Networks in F#: Part 1

F#: Building Neural Networks in F#: Part 2

Go: Build a multilayer perceptron with Golang

Go: How to build a simple artificial neural network with Go

Go: Building a Neural Net from Scratch in Go

JavaScript / Java: Neural Networks - The Nature of Code

[video]

JavaScript: Neural networks from scratch for JavaScript linguists (Part1 — The Perceptron)

Python: A Neural Network in 11 lines of Python

Python: Build Deep Learning From Scratch (reimplement PyTorch internals across 34 stages)

Python: Implement a Neural Network from Scratch

Python: Optical Character Recognition (OCR)

Python: Traffic signs classification with a convolutional network

Python: Generate Music using LSTM Neural Network in Keras

Python: An Introduction to Convolutional Neural Networks

Python: Neural Networks: Zero to Hero

Build neural networks and language models from first principles.

In 3 lists

Python: SlowTorch: Implementation of PyTorch from the ground up in 100% pure Python

Assembly: Writing a Tiny x86 Bootloader

Assembly: Baking Pi – Operating Systems Development

C: Building a software and hardware stack for a simple computer from scratch

[video]

C: Operating Systems: From 0 to 1

Bootstrap yourself to write an OS from scratch by Do Hoang Tu

In 3 lists

C: The little book about OS development

by Erik Helin and Adam Renberg

In 3 lists

C: Roll your own toy UNIX-clone OS

by James Molloy

In 3 lists

C: Kernel 101 – Let’s write a Kernel

In 2 lists

C: Kernel 201 – Let’s write a Kernel with keyboard and screen support

C: Build a minimal multi-tasking kernel for ARM from scratch

by Jim Huang

In 2 lists

C: How to create an OS from scratch

How to create an OS from scratch

In 4 lists

C: Malloc tutorial

C: Hack the virtual memory

C: Learning operating system development using Linux kernel and Raspberry Pi

Learning operating system development using Linux kernel and Raspberry Pi

In 4 lists

C: Operating systems development for Dummies

by Leo Whitehead

In 2 lists

C++: Write your own Operating System

[video]

In 2 lists

C++: Writing a Bootloader

by Alex Parker

In 3 lists

Rust: Writing an OS in Rust

A blog series creating a small operating system in Rust

In 5 listsDetails

Rust: Add RISC-V Rust Operating System Tutorial

by Stephen Marz

In 2 lists

(any): Linux from scratch

C: Video Game Physics Tutorial

Part I: Intro to Rigid Body Dynamics.

In 2 lists

C++: Game physics series by Allen Chou

C++: How to Create a Custom Physics Engine

C++: 3D Physics Engine Tutorial

[video]

JavaScript: How Physics Engines Work

JavaScript: Broad Phase Collision Detection Using Spatial Partitioning

JavaScript: Build a simple 2D physics engine for JavaScript games

Verilog: From Blinker to RISC-V

Learning FPGA, yosys, nextpnr, and RISC-V

In 2 lists

(any): mal - Make a Lisp

In 2 lists

Assembly: Jonesforth

C: Baby's First Garbage Collector

C: Build Your Own Lisp: Learn C and build your own programming language in 1000 lines of code

C: Writing a Simple Garbage Collector in C

by Matthew Plant

In 2 lists

C: C interpreter that interprets itself.

Write a simple interpreter of C. Inspired by c4 and largely based on it.

In 2 lists

C: A C & x86 version of the "Let's Build a Compiler" by Jack Crenshaw

C: A journey explaining how to build a compiler from scratch

A Compiler Writing Journey

In 4 lists

C++: Writing Your Own Toy Compiler Using Flex

C++: How to Create a Compiler

[video]

C++: Kaleidoscope: Implementing a Language with LLVM

F#: Understanding Parser Combinators

Elixir: Demystifying compilers by writing your own

[video]

Go: The Super Tiny Compiler

Go: Lexical Scanning in Go

[video]

Haskell: Let's Build a Compiler

Haskell: Write You a Haskell

In 2 lists

Haskell: Write Yourself a Scheme in 48 Hours

Haskell: Write You A Scheme

Java: Crafting interpreters: A handbook for making programming languages

by Robert Nystrom

In 2 lists

Java: Creating JVM Language

JavaScript: The Super Tiny Compiler

snowman: Possibly the smallest compiler ever

In 2 lists

JavaScript: The Super Tiny Interpreter

JavaScript: Little Lisp interpreter

JavaScript: How to implement a programming language in JavaScript

JavaScript: Let’s go write a Lisp

OCaml: Writing a C Compiler

OCaml: Writing a Lisp, the series

Pascal: Let's Build a Compiler

Python: A Python Interpreter Written in Python

Python: lisp.py: Make your own Lisp interpreter

Python: How to Write a Lisp Interpreter in Python

and (An ((Even Better) Lisp) Interpreter (in Python)) - a couple of famous articles by Peter Norvig.

In 2 lists

Python: Let’s Build A Simple Interpreter

Series of articles explaining the basics of compilers and interpreters and how to build one.

In 2 lists

Python: Make Your Own Simple Interpreted Programming Language

[video]

Python: From Source Code To Machine Code: Build Your Own Compiler From Scratch

Racket: Beautiful Racket: How to make your own programming languages with Racket

by Matthew Butterick

In 2 lists

Ruby: A Compiler From Scratch

Ruby: Markdown compiler from scratch in Ruby

Rust: Learning Parser Combinators With Rust

Swift: Building a LISP from scratch with Swift

TypeScript: Build your own WebAssembly Compiler

C: A Regular Expression Matcher

C: Regular Expression Matching Can Be Simple And Fast

On non-backtracking engines. A follow up includes comparisons of RE2 and PCRE performance.

In 3 lists

Go: How to build a regex engine from scratch

JavaScript: Build a Regex Engine in Less than 40 Lines of Code

JavaScript: How to implement regular expressions in functional javascript using derivatives

JavaScript: Implementing a Regular Expression Engine

Perl: How Regexes Work

Python: Build Your Own Regular Expression Engines: Backtracking, NFA, DFA

Scala: No Magic: Regular Expressions

CSS: A search engine in CSS

Python: Building a search engine using Redis and redis-py

Python: Building a Vector Space Indexing Engine in Python

Python: Building A Python-Based Search Engine

[video]

Python: Making text search learn from feedback

Python: Finding Important Words in Text Using TF-IDF

C: Tutorial - Write a Shell in C

by Stephen Brennan

In 2 lists

C: Let's build a shell!

C: Writing a UNIX Shell

C: Build Your Own Shell

C: Write a shell in C

Go: Writing a simple shell in Go

Rust: Build Your Own Shell using Rust

JavaScript: JavaScript template engine in just 20 lines

JavaScript: Understanding JavaScript Micro-Templating

Python: Approach: Building a toy template engine in Python

Python: A Template Engine

Ruby: How to write a template engine in less than 30 lines of code

C: Build Your Own Text Editor

In 4 listsDetails

C++: Designing a Simple Text Editor

Python: Python Tutorial: Make Your Own Text Editor

[video]

Python: Create a Simple Python Text Editor!

Ruby: Build a Collaborative Text Editor Using Rails

Rust: Hecto: Build your own text editor in Rust

Python: Developing a License Plate Recognition System with Machine Learning in Python

Python: Building a Facial Recognition Pipeline with Deep Learning in Tensorflow

C++: Let's Make a Voxel Engine

Rust: Let's build a browser engine

by Matt Brubeck

In 2 lists

Python: Browser Engineering

by Pavel Panchekha and Chris Harrelson

In 2 lists

C#: Writing a Web Server from Scratch

Node.js: Build Your Own Web Server From Scratch In JavaScript

Node.js: Let's code a web server from scratch with NodeJS Streams

Node.js: lets-build-express

PHP: Writing a webserver in pure PHP

Python: A Simple Web Server

Python: Let’s Build A Web Server.

Python: Web application from scratch

Python: Building a basic HTTP Server from scratch in Python

Python: Implementing a RESTful Web API with Python & Flask

Ruby: Building a simple websockets server from scratch in Ruby

(any): From NAND to Tetris: Building a Modern Computer From First Principles

In 2 lists

(any): build-your-own-x-vibe-coding: BYOX-style tutorials adapted for vibe coding

Alloy: The Same-Origin Policy

C: How to Write a Video Player in Less Than 1000 Lines

C: Learn how to write a hash table in C

C: The very basics of a terminal emulator

C: Write a System Call

C: Sol - An MQTT broker from scratch

In 2 lists

C++: Build your own VR headset for $200

C++: How X Window Managers work and how to write one

C++: Writing a Linux Debugger

by Sy Brand

In 2 lists

C++: How a 64k intro is made

C++: Make your own Game Engine

For the engine programmers and the insane: save yourself some trouble and watch this instead of making yet another game engine ^^

In 2 lists

C#: C# Networking: Create a TCP chater server, TCP games, UDP Pong and more

C#: Loading and rendering 3D skeletal animations from scratch in C# and GLSL

Clojure: Building a spell-checker

Go: Build A Simple Terminal Emulator In 100 Lines of Golang

Go: Let's Create a Simple Load Balancer

Go: Video Encoding from Scratch

~120-line Go weekend project building a simple video encoder from scratch (YUV420P → RLE → DEFLATE).

In 2 lists

Java: How to Build an Android Reddit App

[video]

JavaScript: Build Your Own Module Bundler - Minipack

📦 A simplified example of a modern module bundler written in JavaScript

In 2 lists

JavaScript: Learn JavaScript Promises by Building a Promise from Scratch

JavaScript: Implementing promises from scratch (TDD way)

JavaScript: Implement your own — call(), apply() and bind() method in JavaScript

JavaScript: JavaScript Algorithms and Data Structures

📝 Algorithms and data structures implemented in JavaScript with explanations and links to further readings

In 9 listsDetails

JavaScript: Build a ride hailing app with React Native

JavaScript: Build Your Own AdBlocker in (Literally) 10 Minutes

Kotlin: Build Your Own Cache

Lua: Building a CDN from Scratch to Learn about CDN

Nim: Writing a Redis Protocol Parser

Nim: Writing a Build system

Nim: Writing a MiniTest Framework

Nim: Writing a DMIDecode Parser

Nim: Writing a INI Parser

Nim: Writing a Link Checker

Nim: Writing a URL Shortening Service

Node.js: Build a static site generator in 40 lines with Node.js

Node.js: Building A Simple Single Sign On(SSO) Server And Solution From Scratch In Node.js.

Node.js: How to create a real-world Node CLI app with Node

Node.js: Build a DNS Server in Node.js

Node.js: Build a Synchronization Engine with Node.js and Y.js

PHP: Write your own MVC from scratch in PHP

PHP: Make your own blog

PHP: Modern PHP Without a Framework

PHP: Code a Web Search Engine in PHP

Python: Build a Deep Learning Library

[video]

Python: How to Build a Kick-Ass Mobile Document Scanner in Just 5 Minutes

Python: Continuous Integration System

Python: Recommender Systems in Python: Beginner Tutorial

Python: Write SMS-spam detector with Scikit-learn

Python: A Simple Content-Based Recommendation Engine in Python

Python: Stock Market Predictions with LSTM in Python

Python: Building a simple Generative Adversarial Network (GAN) using Tensorflow

Python: Learn ML Algorithms by coding: Decision Trees

Python: JSON Decoding Algorithm

Python: Build your own Git plugin with python

Ruby: A Pedometer in the Real World

Ruby: Creating a Linux Desktop application with Ruby

Rust: Building a DNS server in Rust

Rust: Writing Scalable Chat Service from Scratch

Rust: WebGL + Rust: Basic Water Tutorial

TypeScript: Tiny Package Manager: Learns how npm or Yarn works

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