A few months ago, I set myself the challenge of writing a C compiler in 500 lines of Python1, after writing my SDF donut post. How hard could it be? The answer was, pretty hard, even when dropping quite a few features. But it was also pretty interesting, and the result is surprisingly functional and not too hard to understand! There's too much code for me to comprehensively cover in a single blog
Rewriting the Ruby parser
At Shopify, we have spent the last year writing a new Ruby parser, which we’ve called YARP (Yet Another Ruby Parser). As of the date of this post, YARP can parse a semantically equivalent syntax tree to Ruby 3.3 on every Ruby file in Shopify’s main codebase, GitHub’s main codebase, CRuby, and the 100 most popular gems downloaded from rubygems.org. We recently got approval to merge this work into C
Amazon ECS deployment circuit breaker のご紹介 | Amazon Web Services
Amazon Web Services ブログ Amazon ECS deployment circuit breaker のご紹介 ※日本語字幕の表示には、設定 → 字幕 → 自動翻訳 → 日本語をご選択ください EC2 および Fargate コンピュートタイプ用の Amazon ECS deployment circuit breaker をパブリックプレビューで発表しました。この機能により、Amazon ECS をご利用のお客様は、手動での作業を行うことなく、不健全なサービスデプロイを自動的にロールバックできるようになります。これにより、お客様は失敗したデプロイを迅速に発見できるようになり、失敗したタスクのためにリソースが消費されたり、デプロイが無期限に遅延したりすることを心配する必要がなくなります。 以前は、Amazon ECS でデプロイメントタイプにローリングアップデートを使
Over the course of my Spring 2020 semester at Harvey Mudd College, I developed a self-hosting compiler entirely from scratch. This article walks through many interesting parts of the project. It’s laid out so you can just read from beginning to end, but if you’re more interested in a particular topic, feel free to jump there. Or, take a look at the project on GitHub. Table of contents What the pro
A Walk with LuaJIT
The following is a chronicle of implementing a general purpose zero-instrumentation BPF based profiler for LuaJIT. Some assumptions are made about what this entails and it may be helpful to read some of our other work in this area. One major change from prior efforts is that instead of working with the original Parca unwinder we are now working with the OpenTelemetry eBPF profiler. If you missed t
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
Release date: May 8, 2025 Update: Enable Next Edit Suggestions (NES) by default in VS Code Stable (more...). Update 1.100.1: The update addresses these security issues. Update 1.100.2: The update addresses these issues. Update 1.100.3: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the April 2025 release
I want to write a post about Pitchfork, explaining where it comes from, why it is like it is, and how I see its future. But before I can get to that, I think I need to share my mental model on a few things, in this case, Ruby’s GVL. For quite a long time, it has been said that Rails applications are mostly IO-bound, hence Ruby’s GVL isn’t that big of a deal and that has influenced the design of so
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
prompts.chat
Welcome to the “Awesome ChatGPT Prompts” repository! While this collection was originally created for ChatGPT, these prompts work great with other AI models like Claude, Gemini, Hugging Face Chat, Llama, Mistral, and more. ChatGPT is a web interface created by OpenAI that provides access to their GPT (Generative Pre-trained Transformer) language models. The underlying models, like GPT-4o and GPT-o
Update 1.75.1: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the January 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Profiles - Create and share profiles to configure extensions, settings, shortcuts, and more. VS
This past May, I started a new job working in Rust. I was somewhat skeptical of Rust for a while, but it turns out, it really is all it’s cracked up to be. As a long-time C++ programmer, and C++ instructor, I am convinced that Rust is better than C++ in all of C++’s application space, that for any new programming project where C++ would make sense as the programming language, Rust would make more
PEP 8 – Style Guide for Python Code Author: Guido van Rossum <guido at python.org>, Barry Warsaw <barry at python.org>, Alyssa Coghlan <ncoghlan at gmail.com> Status: Active Type: Process Created: 05-Jul-2001 Post-History: 05-Jul-2001, 01-Aug-2013 Table of Contents Introduction A Foolish Consistency is the Hobgoblin of Little Minds Code Lay-out Indentation Tabs or Spaces? Maximum Line Length Shoul
I did this in 2020 and then again in 2021, but I’m in the mood to look around again. Let’s look through Are We GUI Yet? and see what’s up these days. The task today is to have a text label and an input field that can change the text in the label. In React, for example, this is basically free: const Demo = () => { let [state, setState] = useState("Hello, world!"); return ( <div> <p>{state}</p> <inp
A professional programmer delivers value through the authoring and maintaining of software that solves problems. (There are other important ways for professional programmers to deliver value but this post is about programming.) Programmers rely on various tools to author software. Arguably the most important and consequential choice of tool is the programming language. In this post, I will articul
July 13, 2022 Six Programming Languages I'd Like to See A few weird ideas for programming languages I came up with that it'd be "really" "cool" if someone made (wink) I got 1,000 words into "what, exactly, is software complexity" before remembering that this is supposed to be less effort than the blog. So instead I'm going to list some ideas I had for programming languages. I think all of these ar
Flipping Pages: An analysis of a new Linux vulnerability in nf_tables and hardened exploitation techniques
This blogpost is the next instalment of my series of hands-on no-boilerplate vulnerability research blogposts, intended for time-travellers in the future who want to do Linux kernel vulnerability research. Specifically, I hope beginners will learn from my VR workflow and the seasoned researchers will learn from my techniques. In this blogpost, I'm discussing a bug I found in nf_tables in the Linux
概要 arelle の使い方を示しつつ、XBRL からきちんとリンクファイルを使って階層構造をとってきて、それに対応するインスタンスを取得する方法を示す。 どちらかといえば、経済学徒ではなく、エンジニア寄りのバックグラウンドを持つ人向けに書いている。 背景 最近、財務諸表の勉強をしていて、いろんな企業の財務諸表を一括で見たいと思った。 読んでいた解説が、財務諸表を視覚化して説明するタイプのものだったので、会計データをとってきて、それを D3.js で描画することを考えた。 結果、作成した財務諸表可視化アプリの方はある程度できていて、以下のリンクから閲覧できる。 https://financial-statements-visualization.sasakiy84.net/ sasakiy84/xbrl-extractor (XBRL 抽出コード) ただし、まだ少し大きめのバグが残っていた
A History of Clojure
71 A History of Clojure RICH HICKEY, Cognitect, Inc., USA Shepherd: Mira Mezini, Technische Universität Darmstadt, Germany Clojure was designed to be a general-purpose, practical functional language, suitable for use by professionals wherever its host language, e.g., Java, would be. Initially designed in 2005 and released in 2007, Clojure is a dialect of Lisp, but is not a direct descendant of any
Last month the V8 team published an excellent blog post on what they call the V8 Sandbox. This isn’t a sandbox for your JavaScript code — it’s intended to mitigate browser exploits caused by bugs in the JIT compiler itself. That’s important work because they report that most Chrome exploits start with a V8 memory safety bug. V8 is written in C++, so it may seem like these are the sort of bugs you’
Example Hay could be used to configure a hypothetical Linux package manager: # cpython.hay -- A package definition hay define Package/TASK # define a tree of Hay node types Package cpython { # a node with attributes, and children version = '3.9' url = 'https://python.org' TASK build { # a child node, with Oil code ./configure make } } This program evaluates to a JSON tree, which you can consume fr
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Writing a C compiler in 500 lines of Python
Kalyn: a self-hosting compiler for x86-64
0.8.0 Release Notes ⚡ The Zig Programming Language
April 2025 (version 1.100)
So You Want To Remove The GVL?
0.10.0 Release Notes ⚡ The Zig Programming Language
January 2023 (version 1.75)
Sayonara, C++, and hello to Rust!
PEP 8 – Style Guide for Python Code | peps.python.org
A 2025 Survey of Rust GUI Libraries
Gregory Szorc's Digital Home | Rust is for Professionals
Six Programming Languages I'd Like to See
XBRL から財務諸表を抽出する | sasakiy84.net
Writing Truly Memory Safe JIT Compilers
Hay - Custom Languages for Unix Systems