We present a broad extension of the conventional formalism of state machines and state diagrams, that is relevant to the specification and design of c…

WIP implementation of a Haskell-like Lisp in Racket - lexi-lambda/hackett

Grant Sanderson is a math educator and creator of 3Blue1Brown, a popular YouTube channel that uses programmatically-animated visualizations to explain concepts in linear algebra, calculus, and other fields of mathematics. This conversation is part of the…

On my engineering team, every team member eventually leads a project, no matter
how junior (or senior) they are. This is a practice I've built up over years.
We've shipped complex projects like rewriting the Uber rider app
[https://eng.uber.com/new-rider…

TL;DR; Mysteriously flagged as incarcerated by Facebook and locked out of my account at the worst possible time.    I was browsing…

I blog mostly about my own programming projects.

As well documented elsewhere, in the past few years Amazon has been developing a slew of its own private brands for a wide variety of products. Now there is nothing wrong with a private label &#821…

kernel mode debugger

The 2.10 release of GIMP added a Symmetric Nearest Neighbour filter: I had never heard of this before, so expected it to be some novel fancy complicated algorithm, but it turns out to be quite simple and old, which made its obscurity surprising. Beyond the…

I have a very large macro instantiation, which takes 4 or 5 hours to compile with Rust 1.40, so I'm looking to improve this unreasonably long build time. The macro wasn't always this slow to build, it seems to have gotten slower with newer versions of Rust…

An instant grid-based pinboard for note taking in your browser.

[Twitter thread, Hacker News discussion, Reddit discussion]

While there already are powered suction-cup devices that allow people or robots to climb walls, they only work on smooth surfaces. Chinese scientists, however, have now developed a system that sticks to rough surfaces via spinning water.

NVIDIA Ampere: GA103/GA104 with 8/16GB and 10/20GB GDDR6 memory on 7nm.

Short Thread: staying with some friends and last night after everyone went to bed I could not figure out how to turn off the large ceiling light in their living room. There is a wall controller that seemed fairly straightforward.

You enter a cave. At the end of a dark corridor, you encounter a pair of sealed chambers. Inside each chamber is an all-knowing wizard. The prophecy says that with these oracles’ help, you can learn the answers to unanswerable problems. But there’s a catch:…

Stories about my nerd projects