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Lagrangian Neural Networks
A blog by Sam Greydanus
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 3,290 posts.
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No, you couldn't have made more money than the Twitter hacker
Analysis of various approaches to monetizing the Twitter hack
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Do Not Follow JavaScript Trends
What to do before adopting every little trend you come across
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Linux maintains bugs: The real reason ifconfig on Linux is deprecated (2018)
In my third installment of FreeBSD vs Linux, I will discuss underlying reasons for why Linux moved away from ifconfig(8) to ip(8).
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Text Processing in the Shell
A quick overview of the most common text processing terminal tools and why they should be part of your day-to-day toolbox.
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When Parallel: Pull, Don't Push
I’ve noticed a small pattern across a few of my projects where I had vectorized and parallelized some code. The original algorithm had a “push” approach, the optimized version instead took a “pull” approach. In this article I’ll describe what I mean, though it’s mostly just so I can show off some pretty videos…
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I had to build a web scraper to buy groceries
Grocery shopping has been one of my least favorite chores, even before the pandemic. Unlike many people I know, I always preferred online shopping over going to the supermarket. Now it’s not a matter
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SeL4 is verified on RISC-V
Sounds great! But what does it mean? seL4 seL4 (pronounced ess-e-ell-four) is arguably the world’s most secure operating system (OS) kernel. The OS kernel is the lowest level of software runn…
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On modern hardware the min-max heap beats a binary heap
The heap is a data structure that I use all the time and that others somehow use rarely. (I once had a coworker tell me that he knew some code was mine because it used a heap) Recently I was writin…
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Thoughts on cameras in the age of excellent cell phone photos
I noted here, I believe, that recently my dSLR, my Nikon d750, basically crapped itself, most likely from a faulty mirror mechanism. This wasn’t entirely a surprise to me — it had devel…
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Your Move, iPad
Hear that? It’s the sound of Mac fans. No, not your shiny new M1 Mac’s fans—chances are, you’ll never hear those—but rather, the sound of excitement rippling through the Mac community. This is something big. Really big. Now, I’m only 33, but someday when I go full fuddy-duddy I will speak of this: the great…
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Libc++'s Implementation of std::string
I. Introduction
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Colorize Your CLI
A passionate engineering student who writes about Unix related topics and tech stuff.
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How I Teach Classes Remotely
Technology, running tech companies, data science, religion, translation technology, natural language processing, backups, p-adic linguistics, academia
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Analyzing HN readers' personal blogs
Analyzing the little guys
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The impact of Apple Silicon Macs on Broadway
Apple Silicon changes everything for Broadway electronic music designers. The new M1 Mac mini is capable of running high-end sample libraries and virtual instruments in a stable manner, and it's only going to get better with M2, M3, and M4-series chips in the future.
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Undiscoverable UI Madness
We have a couple Mac users in the office so I went around and asked them how to do some things on macOS, which as we all know, is much better than iPadOS at making important, useful UI elements easily discoverable. I talked to 3 people who have been using
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Four features that justify a new Unix shell
On a lobste.rs thread about the rationale for the Fennel language, I posted this summary of why Oil exists:
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Cloudflare keeps sending emails over a year after account was cancelled
It has been over a year since I cancelled my Cloudflare account. They keep emailing me and haven't taken me off their marketing lists despite repeated requests. Their CTO told me he would investigate, but nothing changed. Their Data Protection Office hasn't respond to my requests. Cloudflare do not appear to respect…
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Researchers and Founders
I spent many years working with founders and now I work with researchers. Although there are always individual exceptions, on average it’s surprising to me how different the best people in these...
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The Polygons of Doom: PSX
It was a pleasure to research the material for the "Polygons of Another World" articles [1] . All the machines I studied were different from one another. The diversity I witnessed in the Amiga, Atari ST, PC, SNES, Genesis, GBA, and Jaguar demonstrated the richness of a field then still in its dawn. As I concluded the…
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RISC-V OS using Rust: Filesystems
I have taught operating systems at my university, so I will link my notes from that course here regarding the virt I/O protocol. This protocol has changed over the years, but the one that QEMU implements is the legacy MMIO interface.