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Behind GitHub’s new authentication token formats
We’re excited to share a deep dive into how our new authentication token formats are built and how these improvements are keeping your tokens more secure. As we continue to…
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 247 posts.
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Doom Rendered via Checkboxes
WebAssembly meets 16000 HTML checkboxes.
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Programming Language Memory Models
Programming language memory models answer the question of what behaviors parallel programs can rely on to share memory between their threads. For example, consider this program in a C-like language, where both x and done start out zeroed.
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Avy Can Do Anything
Update (2024-09-08): Read this article in Japanese at Qiita or at Emacs-JP. You’re using Avy wrong. Too harsh? Let me rephrase: you’re barely using Avy. Still too broad? Okay, the noninflammatory version: Avy, the Emacs package to jump around the screen, lends itself to efficient composable usage that’s obscured by…
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Tvix: We Are Rewriting Nix
TVL's blog
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Querying Parquet with Precision Using DuckDB
DuckDB, a free and open source analytical data management system, can run SQL queries directly on Parquet files and automatically take advantage of the advanced features of the Parquet format.
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Ignoring bulk change commits with Git blame (2019)
A long-standing objection to making bulk changes to code using automated tools (e.g. to conform to a given code style) is that it clutters the output of git blame. With git 2.23, this does not have to be the case anymore! In this post I will start by explaining the value of git blame and […]
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Gitlab default branch name changes to main
Why we're joining the Git community and updating "master" to "main".
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Architecture.md
If you maintain an open-source project in the range of 10k-200k lines of code, I strongly encourage you to add an ARCHITECTURE document next to README and CONTRIBUTING. Before going into the details of why and how, I want to emphasize that this is not another docs are good, write more docs advice. I am pretty sloppy…
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How we got to LiveView
I'm Chris McCord. I work at Fly.io and created Phoenix, an Elixir web framework. Phoenix provides features out-of-the-box that are difficult in other languages and frameworks. This is a post about how we created LiveView, our flagship feature.
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Git undo: We can do better
Update for future readers: Are you looking for a way to undo something with Git? The git undo command won’t help with your current issue (it needs to be inst...
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A single line of code made a 24-core server slower than a laptop
Imagine you wrote a program for a pleasingly parallel problem, where each thread does its own independent piece of work, and the threads don’t need to coordi...
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Linux Touchpad Like MacBook Update: Touchpad Gestures Now Shipping
Bill is driven by the challenge of how best to quantify valuable questions that defy quantification. It's possible this instinct may have been awakened in Bill at age 14, when he won a soft, stuffed bunny at the orthodontist for guessing the number of jelly beans in the gumball machine.
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Why asynchronous Rust doesn't work
This is old! When I wrote it, I was a very different person.As it turns out, growing up a bit made me care a lot less about the nuances of Rust programming.
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We found and fixed a rare race condition in our session handling
On March 8, out of an abundance of caution, we logged all users out of GitHub.com. In this post we share technical details of the vulnerability and steps we're taking to ensure it doesn't happen again.
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macOS Nix setup: an alternative to Homebrew (2020)
I recently got a new Macbook, and began setting up the Nix package manager to install my developer toolset. I mainly did this to try and have a working setup without installing Homebrew. Since I ran into a few issues, I wanted to briefly document what I did and why in case others wanted to try the same. Why Nix? (and…
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Let's code a TCP/IP stack (2016)
Writing your own TCP/IP stack may seem like a daunting task. Indeed, TCP has accumulated many specifications over its lifetime of more than thirty years. The core specification, however, is seemingly compact[^tcp-roadmap] - the important parts being TCP header parsing, the state machine, congestion control and…
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GCC: The customer has nuclear weapons. They do not do “bounty”
Anubis could not load its JavaScript. The server may be overloaded. Please reload the page to try again.
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Gitlet.js – Git implemented in 1k lines of JavaScript (2015)
I wrote Gitlet to show how Git works under the covers. I wrote it to be readable. I commented the code heavily.
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The data model behind Notion's flexibility
Notion’s data model enables the product’s most foundational component: blocks. Through blocks, we allow users more flexibility over their information.
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RCE in Visual Studio Code's Remote WSL for Fun and Negative Profit
The Visual Studio Code server in Windows Subsystem for Linux uses a local WebSocket WebSocket connection to communicate with the Remote WSL extension. JavaScript in websites can connect to this server and execute arbitrary commands on the target system. Assigned CVE-2021-43907 and zero bounty. I paid 5 USD for the EC2…
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How to Learn Nix
It's like a Let's Play, but for obscure software documentation. I tried to learn Nix, and it was pretty hard. I kept a diary of every command I tried, every wrong assumption that I made, and every realization that I had along the way.
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DNA seen through the eyes of a coder
Updates: 12th of September 2021: I’m writing a book on DNA! If you want to become a beta reader, or have suggestions, I’d love to hear from you! 8th of January 2021: This article has been revised and updated, scientifically and in terms of dead links. Revision made by Tomás Simões (@putadagravidade /…
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V8 Sparkplug – A non-optimizing JavaScript compiler
In V8 v9.1 we’re improving V8 performance by 5–15% with Sparkplug: a new, non-optimizing JavaScript compiler.
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“Computer science is not about computers”
Edsger W. Dijkstra? Alan Perlis? Jacques Arsac? George Johnson? Donald Knuth? Matthew Dennis Haines? Anonymous?