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How Pulse Oximeters Work (2015)
Principles of how pulse oximetry works explained without using complicated physics.
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The latest blog posts to take off on Hacker News. 5,567 posts.
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What if the Trinity test had failed?
If the first nuclear weapons test had been a flop, would the world be better or worse off?
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The GitHub Arctic Code Vault
Our mission is to preserve open source software for future generations by storing your code in an archive built to last a thousand years.
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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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Who is the greatest knife steel metallurgist of all time?
There have been many metallurgists over the decades who have developed steels used in knives. Who has made the greatest contribution?
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Zulip 3.0: Threaded Open Source Team Chat
We’re excited to announce the release of Zulip Server 3.0, containing hundreds of new features and bug fixes to help distributed and remote teams stay productive and focused. Zulip is the open-source threaded team chat app, used by thousands of teams globally. Zulip’s unique topic-based threading experience …
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Continuations by example: Exceptions, time-traveling search, threads, and more
Continuations are the least understood of all control-flow constructs. This lack of understanding (or awareness) is unfortunate, given that continuations permit the programmer to implement powerful language features and algorithms, including exceptions, backtracking search, threads, generators and coroutines.
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Shipping Const Generics in 2020
It’s hard to believe that its been more than 3 years since I opened RFC 2000 , which defined the const generics for Rust. At the same time, reading the RFC thread, there’s also been a huge amount of change in this area: for one thing, at the time the RFC was written, const fns weren’t stable, and consts weren’t even…
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Introducing Swift Service Lifecycle
It is my pleasure to announce a new open source project for the Swift server ecosystem, Swift Service Lifecycle. Service Lifecycle is a Swift package designed to help server applications, also known as services, manage their startup and shutdown sequences.
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I'm back into the grind of FreeBSD's wireless stack and 802.11ac
hi! Yes, it's been a while since I posted here and yes, it's been a while since I was actively working on FreeBSD's wireless stack. Life's...
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Reverse engineering a camera protocol for fun and profit
Way back in late 2019 , I dissected a Reolink B800 IP camera to demonstrate the various parts of an embedded Linux system. It’s fairly nice hardware, actually—it has a 4K video sensor, a microphone, power over Ethernet, and is nominally waterproof. And yes, it runs Linux.
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The GitHub Availability Report
What is the Availability Report? Historically, GitHub has published post-incident reviews for major incidents that impact service availability. Whether we’re sharing new investments to infrastructure or detailing site downtimes, our…
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Everything you need to know about OAuth 2.0
OAuth provides third party applications limited access to user resources without compromising the user's data. Find out exactly how in this blog.
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Amazon Interactive Video Service – Add Live Video to Your Apps and Websites
Today, I am so excited to tell you about the new Amazon Interactive Video Service, which allows you to add live video directly into your own apps and websites. If you are anything like me, you are going to be blown away by how simple the team have made it to integrate interactive, low latency, […]
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Don't Panic! Better, Fewer, Syntax Errors for LR Parsers
Abstract Syntax errors are generally easy to fix for humans, but not for parsers in general nor LR parsers in particular. Traditional ‘panic mode’ error recovery, though easy to implement and applicable to any grammar, often leads to a cascading chain of errors that drown out the original. More advanced error recovery…
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Tech sector job interviews assess anxiety, not software skills: study
The design of "technical interviews" is hurting the tech sector.
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The Fake Cisco
True cyber security combines advanced technology and best practice. Get tips and read articles on how to take your online security even further.
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Riot is now Element
Hi everyone, We are incredibly excited to announce that Riot is now Element! In fact we have simplified all our naming: Element is also the name for New Vector (the company behind Riot) while Modular, our flagship Matrix hosting service, has become Element Matrix Services. For those discovering us for
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Data structures and algorithms I actually used while working at tech companies
Do you actually use data structures and algorithms on your day to day job? I've noticed a growing trend of people assuming algorithms are pointless questions that are asked by tech companies purely as an arbitrary measure. I hear more people complain about how all of this is a
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How to write technical posts so people will read them (2019)
One of today’s best bloggers in the functional programming space is Chris Penner . Despite this, Chris is criminally underrated—nobody I talk to seems to know of his work. Go check him out as soon as you finish reading this post!
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Lies, damn lies, and front-end tracking
I’m here to warn you about the dangers of front-end user tracking. Not because Google is tracking you, but because it doesn’t track you quite well enough.
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How SHA-2 works step-by-step (SHA-256)
Learn to code from scratch with hands-on lessons, a structured curriculum, and real projects. Stop watching tutorials, start writing code for free now.
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In search of 2.11BSD, as originally released
In Search of 2.11BSD, as released Almost all of the BSD releases have been well preserved. If you want to find 1BSD, or 2BSD or 4.3-TAHOE BS...