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Ruby 3.0
We are pleased to announce the release of Ruby 3.0.0. From 2015 we developed hard toward Ruby 3, whose goal is performance, concurrency, and Typing. Especial...
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Software Engineering
The most popular blog posts about software engineering on Hacker News. 21,809 posts.
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Phoenix LiveView 1.0.0 is here
LiveView 1.0 is out!
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Don't DRY Your Code Prematurely
This is another post in our Code Health series. A version of this post originally appeared in Google bathrooms worldwide as a Google Tes...
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Billing systems are a nightmare for engineers
In this article, Lago's cofounder Raffi gives an overview of the technical challenges we faced while implementing a hybrid pricing model at Qonto, and what we learned during this journey.
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Crafting “Crafting Interpreters”
It took three years and 200,000 words more than I expected, but my second book, Crafting Interpreters , is complete. I finished the third draft of the last chapter today, marking the last of around 1,400 days of continuous writing.
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Writing Code Was Never the Bottleneck
LLMs make it easier to write code, but understanding, reviewing, and maintaining it still takes time, trust, and good judgment.
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Helping a Million Developers Exit Vim
You're not alone, jclancy. In the five years since this question was asked, there have been over a million other developers who got stuck in Vim and couldn't escape without a bit of help. Indeed, the difficulty of quitting the Vim editor is a common joke among developers.
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Go 1.18
Go 1.18 adds generics, native fuzzing, workspace mode, performance improvements, and more.
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Formalizing Fermat's Last Theorem
Anthropic is an AI safety and research company that's working to build reliable, interpretable, and steerable AI systems.
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Transcribe.cpp
A place to play around with technology and make it easy and fun
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Ubershaders: A Ridiculous Solution to an Impossible Problem
When you're playing your favorite game on Dolphin with a powerful computer, things should run fairly well. The game is running full speed, there are no graphical glitches, and you can use your favorite controller if you want. Yet, every time you go to a new area, or load a new effect, there's a very slight but…
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A Farewell to FRP
A delightful language with friendly error messages, great performance, small assets, and no runtime exceptions.
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Smuggling arbitrary data through an emoji
With ZWJ (Zero Width Joiner) sequences you could in theory encode an unlimited amount of data in a single emoji.
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Database Fundamentals
The fundamental problems a database engineer thinks about in the shower
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Run DeepSeek R1 Dynamic 1.58-bit
DeepSeek R-1 is the most powerful open-source reasoning model that performs on par with OpenAI's o1 model. Run the 1.58-bit Dynamic GGUF version by Unsloth.
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PHP: A fractal of bad design
(This article has been translated into Spanish (PDF, with some additions) by Jorge Amado Soria Ramirez — thanks!) Preface I’m cranky. I complain about a lot of things. There’s a lot in the world of technology I don’t like, and that’s really to be expected—programming is a hilariously young discipline, and none of us
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Qwen3-Coder: Agentic coding in the world
GITHUB HUGGING FACE MODELSCOPE DISCORD Today, we’re announcing Qwen3-Coder, our most agentic code model to date. Qwen3-Coder is available in multiple sizes, but we’re excited to introduce its most powerful variant first: Qwen3-Coder-480B-A35B-Instruct — a 480B-parameter Mixture-of-Experts model with 35B active…
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Structured Outputs in the API
We are introducing Structured Outputs in the API—model outputs now reliably adhere to developer-supplied JSON Schemas.
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Building Effective "Agents"
Practical guidance from Anthropic on building reliable AI agents, from simple composable patterns to fully autonomous systems.
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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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Choose Postgres queue technology
Introduction Postgres queue tech is a thing of beauty, but far from mainstream. Its relative obscurity is partially attributable to the cargo cult of “scale”. The scalability cult has decreed that there are several queue technologies with greater “scalability” than Postgres, and for that reason alone, Postgres isn’t…
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Awk in 20 Minutes (2015)
Awk is a tiny programming language and a command line tool. It's particularly appropriate for log parsing on servers, mostly because Awk will operate on files, usually structured in lines of human-readable text.
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Modern CSS Explained
CSS is strangely considered both one of the easiest and one of the hardest languages to learn as a web developer. It’s certainly easy…
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New(ish) command line tools
A list of new(ish) command line tools
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A Decade of Slug
What is now known as the Slug Algorithm for rendering fonts directly from Bézier curves on the GPU was developed in the Fall of 2016, so this year marks a full decade since its inception. I published a paper in JCGT about the technique in the middle of 2017, and my company sold the first license for version 1.0 of the…