Adding Go's defer to the TypeScript Compiler 🔗
Forking tsc to support Go's defer. [...]
Andrew Healey's Blog
Posts
A Tiny Compiler for Data-Parallel Kernels 🔗
Exploring how compilers lower ordinary loops into explicit data-parallel kernels. [...]
Building a Runtime with QuickJS 🔗
Building a tiny JavaScript runtime on top of QuickJS with timers, file I/O, and an event loop. [...]
Building a Shell 🔗
I built a tiny shell in C to learn what fork, execvp, and dup2 are doing under the hood. [...]
A Fair, Cancelable Semaphore in Go 🔗
Building a fair, cancelable semaphore in Go and the subtle concurrency issues involved. [...]
Solving NYT's Pips Puzzle 🔗
A solver for The New York's Times' daily Pips puzzle. [...]
Compiling a Forth 🔗
A bytecode compiler and VM for a Forth-like language. [...]
Icepath: a 2D Programming Language 🔗
Sliding around a cave and hitting opcodes. [...]
Counting Words at SIMD Speed 🔗
Rewriting a word counting program five times until it's 494x faster. [...]
Optimizing My Disk Usage Program 🔗
Increasing performance by reducing thread scheduling overhead and lock contention. [...]
Maybe the Fastest Disk Usage Program on macOS 🔗
A very fast du -sh clone for macOS. [...]
Filesystem Backed by an LLM 🔗
FUSE filesystem where file operations are handled by an LLM. [...]
Solving Queuedle 🔗
Writing a game solver for Queuedle. [...]
How I Made Queuedle 🔗
A daily word-sliding puzzle game inspired by Wordle and Scrabble. [...]
Visualizing Chess Bitboards 🔗
Brief introduction to chess bitboards and move generation with animations. [...]
Installing NPM Packages Very Quickly 🔗
Building a package manager with a fast install step. [...]
Building Game Prototypes with LÖVE 🔗
Chess, card games, and Lua. [...]
Compiling Lisp to Bytecode and Running It 🔗
Extending my Lisp compiler and adding a fast virtual machine. [...]
Generating Mazes 🔗
Visualizations and techniques for different maze generation algorithms. [...]
Making Python Less Random 🔗
Using ptrace to intercept and modify a process's getrandom syscall. [...]
2D Multiplayer From Scratch 🔗
Exploring patterns and systems for creating realtime browser games. [...]
Lisp Compiler Optimizations 🔗
Smaller programs that do less work. [...]
Lisp to JavaScript Compiler 🔗
Transpiling Lisp to JavaScript using Rust. [...]
Adding a Line Profiler to My Language 🔗
Creating my own developer tooling, and some thoughts on line profilers. [...]
Compressing CS2 Demos 🔗
Shrinking demo data by a factor of 13x. [...]
A Custom WebAssembly Compiler 🔗
Making my programming language 4000x quicker, and adding a static type checker. [...]
Rendering Counter-Strike Demos in the Browser 🔗
Building a demo player for coaches and analysts to visualize CS2 gameplay. [...]
Porting Boolrule To Rust 🔗
Building a fast boolean expression evaluation engine. [...]
Running Untrusted Python Code 🔗
Using seccomp and setrlimit to build a Python sandbox. [...]
Building Family Websites 🔗
The highest user-joy-per-visit than any other project I'll ever work on. [...]
My Own Python Web Framework 🔗
Using Vercel's Build Output API to explore some framework ideas. [...]
My Time At The Recurse Center 🔗
Thoughts and reflections on my six week batch. [...]
Sandboxing JavaScript Code 🔗
An overview of the sandboxing landscape, and some experiments with Deno. [...]
Implementing Highlighting, Search, and Undo 🔗
How I added three new features to my text editor. [...]
Making a Text Editor with a Game Engine 🔗
Writing my own quirky version of nano using the 2D game engine Ebitengine. [...]
Profiling and Optimizing an Interpreter 🔗
Rewriting library code to speed up my interpreter benchmark by 28%. [...]
Adding For Loops to an Interpreter 🔗
Extending an existing tree-walk interpreter step by step. [...]
A Personal File Share CLI 🔗
Sharing files with my friends from the terminal. [...]
CodeGuessr 🔗
Building a guessing game for popular open source projects. [...]
Recent Projects I Didn't Finish 🔗
A few ideas I tried. Including flamegraphs, fast HTTP routing, and infinite chess. [...]
Virtual Ants 🔗
Artificial life and Langton's ant. [...]
Implementing Bitcask, a Log-Structured Hash Table 🔗
Shipping a speedy key/value store for datasets larger than memory. [...]
Building and Solving Sokoban 🔗
Creating an automated solver for Sokoban puzzles. [...]
Beating grep with Go 🔗
Writing a fast file searching program and benchmarking it. [...]
When I'm Sad My Computer Sends Me Cats 🔗
I wrote a program that sends cats to my phone when I'm sad at the computer. [...]
Designing a Code Playground for Adventlang 🔗
Using Web Workers and WebAssembly to build a speedy UI. [...]
Designing a Programming Language for Advent of Code 🔗
What is the minimum amount of features I need to not hate my life during this festive season? [...]
DOOM Rendered via Checkboxes 🔗
WebAssembly meets 16000 HTML checkboxes. [...]
Porting Niceware to Rust 🔗
The sensation of incremental progress when programming with Rust. [...]
Creating the Golfcart Programming Language 🔗
Writing an interpreter from scratch. [...]
Listening to Satellites with my Raspberry Pi 🔗
Building a live dashboard with the help of a few hardware modules. [...]
Computer Vision and Embroidery 🔗
Picking the correct thread colors from embroidery hoop images. [...]
GeoGuessing with Deep Learning 🔗
Applying photo geolocation estimation to the game of GeoGuessr. [...]
WebAssembly Search Tools for Static Sites 🔗
Building a technical demo to understand this blossoming area of technology. [...]
Generating Text With Markov Chains 🔗
Generating random but familiar text by building Markov chains from scratch. [...]
Personal Websites and Internet Writing 🔗
People that inspire me the most (and that I steal from most regularly). [...]
Building My Own Chess Engine 🔗
Exploring the computational complexity of chess. Code snippets in Python so you can do the same. [...]
Writing Software for an Among Us League 🔗
Making a casual game more competitive and arguing with my friends about Elo systems. [...]
Learning the Ink Programming Language 🔗
Picking up Ink and giving back to the community. [...]
Privacy Focused Analytics From Scratch 🔗
Learning more about user data collection by writing my own analytics system. [...]
Boids in WebAssembly Using Go 🔗
The famous flocking simulation built with the Ebiten game library. [...]
Creating Randomness Without Math.random 🔗
Building a replacement for JavaScript's random number generator. [...]
A Practical Introduction to Graphs (Network Diagrams) 🔗
Calculating the path between two countries with the least border crossings. [...]
Polyfilling the Fetch API for Old Browsers and Node.js 🔗
A quick look at polyfilling, along with with solutions for both environments. [...]
The Flow of Knowledge in a Team (or Why I Dig Tickets) 🔗
Engineering tickets often end up meaning a lot. For the product but also emotionally for the individual. [...]
Adding Comments to Gatsby with Netlify Serverless Functions + GitHub 🔗
Use Netlify serverless functions to let users add comments to a static website. [...]
Hacking Together an E-ink Dashboard 🔗
A prototype Raspberry Pi dashboard to save me talking to my smart assistant. [...]
How I'm Working Remotely 🔗
Writing code, working (almost) solo, and exploring remote-life during the UK lockdown. [...]
Twitter Ticker Tape with a POS58 Receipt Printer 🔗
Building a fun toy with my Raspberry Pi, Python, and Tweepy. [...]
Book Review: The Developer's Guide to Content Creation 🔗
Discussing an amazing resource for those writing for developers. [...]
DEV Article Analysis 🔗
Building a tool for users to analyze their work over time. [...]
Gatsby Sparks Joy 🔗
Migrating from Jekyll to Gatsby. [...]
Hardest JavaScript Puzzle I've Ever Solved 🔗
Writing JavaScript with a one character width restriction. [...]
Let's Build a CAPTCHA Generator with Node.js 🔗
Using Canvas, Express, and a GitHub Action. [...]
Cloning Memcached with Go 🔗
I'm really starting to enjoy Go. [...]
My First Golang Program 🔗
Conway's Game of Life in Ebiten. [...]
I Built a Bot to Try and Get Money Back From My Internet Provider 🔗
My most popular project yet! [...]
My Experience with Pair Programming 🔗
Pairing for fun and profit. [...]
An Introduction to Caching on the Web, With Examples in Python 🔗
A high-level overview of caching. [...]
What If I Want My Website to Last for 100 Years? 🔗
Prepping for the internet to happen. [...]
A Tutorial on Tricking Google: Encoding Messages in Apostrophes 🔗
Using character codes to hide in plain sight. [...]
Your First Open-Source Pull Request: a Walkthrough 🔗
Making a small change to the Jekyll project. [...]
Refactoring JavaScript for Performance and Readability (with Examples!) 🔗
A few tips that have really helped me. [...]
Saving Data in JavaScript Without a Database 🔗
The title is a lie I also show how to use SQLite. [...]
Interview Question: Implement a Progress Bar 🔗
Different ways to do one thing well. [...]
Solving Puzzles With High-Performance JavaScript 🔗
It's fast but is it worth it? [...]
A Tiny Project, From Inception to Deployment 🔗
A JavaScript webscraper for MDN. [...]
Continuous Deployment to Glitch via GitHub Webhooks 🔗
Joining two of my favorite ecosystems together. [...]
Fun With Linear Time: My Favorite Algorithm 🔗
Breaking down the Boyer–Moore majority vote algorithm with examples in Python. [...]
What They Don't Teach You at a Computer Science Masters 🔗
Bubblesort isn't everything. [...]
The Weird Rules I Set Myself That Got Me a Job 🔗
Advice that I haven't seen elsewhere. [...]
How to Write an Awesome GitHub README 🔗
Attract and educate. [...]
Talking to Python from JavaScript (and Back Again!) 🔗
Let's learn how to pass data back and forth between languages. [...]
Learn the Storage API by Building a Note Taking App (Tutorial) 🔗
Learning and building. [...]
Embed Your Latest DEV Posts Anywhere (Tutorial) 🔗
Using the DEV.to API with Node. [...]
Build a Python Bot to Find Your Website's Dead Links (Tutorial) 🔗
Crawling a website for missing resources using the Python standard library. [...]
Answered: What the Heck is Code Golf? 🔗
I love code golf and you should too! [...]
JavaScript One-Liners That Make Me Excited 🔗
Dust off your ternary expressions, we're going in. [...]
Need a Friend? Write a Reddit Bot with Python to Follow You Around (Tutorial) 🔗
The basics of building a Reddit bot that listens for phrases and replies to them. [...]
Earn a Build Passing Badge on GitHub! Testing Your Express App with Travis CI (Tutorial) 🔗
How to setup Travis CI for a Node/Express project. [...]
Coding a Live Cam for the Raspberry Pi in Python (Tutorial) 🔗
A lo-fi solution for streaming images from your Raspberry Pi to the web. [...]
How Flappy Bird Got Me My Start in Software 🔗
An overview of how I learned to code. Also a bit on my experience during my CS Masters. [...]
A Day in the Life of a Mediumly Productive Software Engineer 🔗
Living, working, building, and drinking too much coffee. [...]
Kicking Butt and Taking Names With WebSockets (Tutorial) 🔗
A little on the history of WebSockets and a brief overview on how to use them in JavaScript. [...]
Two Things About My First In-house Software Job That I Didn't See Coming 🔗
On enjoying being part of a team. [...]
Creating Cute GitHub Badges Based Off a Project's Mood (Node.js) 🔗
Creating GitHub badges based off the time when most people contribute to a GitHub project. [...]
Real-Time Streaming of Every Emoji Posted as a Comment to Reddit.com 🔗
Building a website which live streams every emoji posted to Reddit.com. [...]
I Ported Sudoku to Your URL Bar and It Plays like a Dream 🔗
Goofy project in which you can play Sudoku entirely within your URL bar. [...]
Cloning Dominos Order Tracker as a Microservice with Node.js and Firebase! 🔗
Writing an order tracker with Node, Express, and Firebase. [...]
Benchmarking WebSocket Servers with Python! 🔗
Benchmarking websocket servers and frameworks with async Python. [...]
Leetcode - Episode 17 - Moving, Shaking, and Folding (3 x E) 🔗
Solutions for: Move Zeroes, Merge Two Sorted Lists, and Merge Two Binary Trees. [...]
Leetcode - Episode 16 - Pretty Efficient (3 x E) 🔗
Solutions for: Flipping an Image, Leaf-Similar Trees, and Maximum Depth of N-ary Tree. [...]
Leetcode - Episode 15 - Three Tree Qs (3 x E) 🔗
Solutions for: Invert Binary Tree, N-ary Tree Postorder Traversal, and N-ary Tree Preorder Traversal. [...]
Leetcode - Episode 14 - Short, Easy Solutions (3 x E) 🔗
Solutions for: Monotonic Array, Max Consecutive Ones, and Contains Duplicate. [...]
Leetcode - Episode 13 - Finding My Stride (3 x M) 🔗
Solutions for: Range Sum of BST, Max Increase to Keep City Skyline, and Custom Sort String. [...]
Leetcode - Episode 12 - Starting Early (3 x E) 🔗
Solutions for: Verifying an Alien Dictionary, Reverse Only Letters, and Backspace String Compare. [...]
Leetcode - Episode 11 - Faster than 99.17% (1 x M, 2 x E) 🔗
Solutions for: Reverse Vowels of a String, Isomorphic Strings, and Reverse Words in a String. [...]
Leetcode - Episode 10 - Short Solutions (1 x M, 2 x E) 🔗
Solutions for: Single Number II, Fibonacci Number, and Ransom Note. [...]
Leetcode - Episode 9 - Trudging Through (3x E) 🔗
Solutions for: Majority Element, Detect Capital, and Not Boring Movies. [...]
Leetcode - Episode 8 - Breaking Out Some Mediums (3x M, 1x E) 🔗
Solutions for: Encode and Decode TinyURL, Insert into a Binary Search Tree, Minimum Add to Make Parentheses Valid, and Goat Latin. [...]
Leetcode - Episode 7 - Getting More Pythonic (3x E) 🔗
Solutions for: Two Sum, Valid Anagram, and Length of Last Word. [...]
Leetcode - Episode 6 - Progressively Harder (3x E) 🔗
Solutions for: Keyboard Row, Reorder Log Files, and Single Number. [...]
Leetcode - Episode 5 - Fastest Solutions Yet (3x E) 🔗
Solutions for: Uncommon Words from Two Sentences, Search in a Binary Search Tree, and Fizz Buzz. [...]
Leetcode - Episode 4 - gnivloS melborP (3x E) 🔗
Solutions for: Reverse Words in a String III, Sort Array By Parity II, and Reverse String. [...]
Leetcode - Episode 3 - The Streak Continues (3x E) 🔗
Solutions for: Sort Array By Parity, Robot Return to Origin, and Self Dividing Numbers. [...]
Leetcode - Episode 2 - Three More Easys 🔗
Solutions for: N-Repeated Element in Size 2N Array, Univalued Binary Tree, and Unique Morse Code Words. [...]
Leetcode - Episode 1 - Three Easys 🔗
Episode one of tacking Leetcode problems and discussing solutions. Jewels and Stones, Unique Email Addresses, and To Lower Case. [...]