技術部の笹田（ko1）と遠藤（mame）です。クックパッドで Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 本日 12/25 に、ついに Ruby 3.1.0 がリリースされました（Ruby 3.1.0 リリース ）。今年も Ruby 3.1 の NEWS.md ファイルの解説をします。NEWS ファイルとは何か、は以前の記事を見てください。 プロと読み解く Ruby 2.6 NEWS ファイル - クックパッド開発者ブログ プロと読み解くRuby 2.7 NEWS - クックパッド開発者ブログ プロと読み解くRuby 3.0 NEWS - クックパッド開発者ブログ 本記事は新機能を解説することもさることながら、変更が入った背景や苦労な
Over the past few months, during the lead-up to the TypeScript 5.0 beta, our team spent a good portion of our time looking for ways to improve the performance of our compiler so that your projects build faster. One of the ways we improved was by looking into an oft overlooked aspect of many JavaScript VMs: inline caching. A Brief Primer on Inline Caching Inline caching is an optimization often use
Today we’re excited to announce the availability of TypeScript 4.4! If you haven’t heard of TypeScript yet, it’s a language that builds on JavaScript by adding syntax for static types. Tools like the TypeScript compiler just erase those types, leaving you with clean readable JavaScript that you can run anywhere; but those types are there to be type-checked! Types make your intentions explicit, and
Today, we are excited to announce the launch of .NET 10, the most productive, modern, secure, intelligent, and performant release of .NET yet. It’s the result of another year of effort from thousands of developers around the world. This release includes thousands of performance, security, and functional improvements across the entire .NET stack-from languages and developer tools to workloads-enabl
Today we’re excited to announce the availability of TypeScript 4.7! If you’re not yet familiar with TypeScript, it’s a language that builds on JavaScript and adds syntax for types. Types help describe what kinds of values you’re working with and what kinds of functions you’re calling. TypeScript can use this information to help you avoid about mistakes like typos, missing arguments, or forgetting
Announcing Rome v10
We are thrilled to announce Rome v10, the first stable release since the start of the Rust rewrite. Rome is an ambitious project aiming to unify the dozens of frontend language tools into a single easy-to-use tool built from scratch. This release includes our fast linter and formatter; they require minimal configuration, come with beautiful and descriptive diagnostics, and have built-in support fo
Today we are excited to announce the beta release of TypeScript 4.7! To get started using the beta, you can use npm with the following command: npm install typescript@beta You can also get editor support by Downloading for Visual Studio 2022/2019 Following directions for Visual Studio Code and Sublime Text 3. Here’s a quick list of what’s new in TypeScript 4.7! ECMAScript Module Support in Node.js
UoPeopleでComparative Programming Languages（プログラミング言語比較論）を修了した - えんぴつぶろぐ
オンライン大学 University of the People でComparative Programming Languages (CS4402) を修了したのでその感想を書きます。 これまでのUoPeople関連の記事はこちら： UoPeople カテゴリーの記事一覧 - えんぴつぶろぐ はじめに プログラミング言語のパラダイムの変化を追いながら、命令型言語と非命令言語（関数型や論理型など）の特徴を学び比較を行うコースです。 各言語の歴史や特徴だけでなく、コンピューターシステムのアーキテクチャやコンパイルの仕組みなども触れるので、今までのCS系コースの総復習的な内容だと感じました。 #UoPeople プログラミング言語比較論(#CS2204)の感想。 言語の比較だけじゃなく今までのCS系コースの総復習的な内容だった。 ノイマンアーキテクチャ、チューリングチャーチ理論から始まるプロ
All JavaScript and TypeScript Features of the last 3 years
TypeScript as envisioned by Stable DiffusionThis article goes through almost all of the changes of the last 3 years (and some from earlier) in JavaScript / ECMAScript and TypeScript . Not all of the following features will be relevant to you or even practical, but they should instead serve to show what’s possible and to deepen your understanding of these languages. There are a lot of TypeScript fe
Golang Mini Reference 2022: A Quick Guide to the Modern Go Programming Language (REVIEW COPY)
Golang Mini Reference 2022 A Quick Guide to the Modern Go Programming Language (REVIEW COPY) Harry Yoon Version 0.9.0, 2022-08-24 REVIEW COPY This is review copy, not to be shared or distributed to others. Please forward any feedback or comments to the author. • feedback@codingbookspress.com The book is tentatively scheduled to be published on September 14th, 2022. We hope that when the release da
OBSのブラウザソースで動くものを作るあなたへ
MacOSのみ一部バージョンが異なるのは26.1.1リリースのタイミングでブラウザソースがクラッシュする問題が発生し、hotfixとして26.1.2リリースのタイミングでMac版のみアップデートがなされたためです。 このようにバージョンアップのタイミングはまちまちで、XSplitに関しては最近までChrome 68系、OBSについても最新版の30.xでもChrome 103系と執筆現在(2024/04/22)での最新バージョンであるChrome 124から21バージョン遅れをとっている状況です。 これらのアップデートが進まないことの背景には、OBSがCEF経由でページの表示をテクスチャとして使用するためにテクスチャ共有を利用しながら、ゲームなどの他のソフトウェアやキャプチャを使用するためにもテクスチャ共有を利用していることと、CEFがOffscreen Rendering(OSR)時にハー
ESLint v9.x end-of-life is 2026-08-06 and will not be maintained after that. Upgrade or consider long-term support options Published 05 Apr, 2024 under Release Notes ESLint v9.0.0 released We just pushed ESLint v9.0.0, which is a major release upgrade of ESLint. This release adds some new features and fixes several bugs found in the previous release. This release also has some breaking changes, so
Today we’re excited to announce our Release Candidate (RC) of TypeScript 4.7! Between now and the stable release of TypeScript 4.7, we expect no further changes apart from critical bug fixes. To get started using the RC, you can get it through NuGet, or use npm with the following command: npm install typescript@rc You can also get editor support by Downloading for Visual Studio 2022/2019 Following
Today we’re excited to announce the release of TypeScript 5.4! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by making it possible to declare and describe types. Writing types in our code allows us to explain intent and have other tools check our code to catch mistakes like typos, issues with null and undefined, and more. Types also power TypeScript’s edi
JSer.info #662 - Babel v7.23.0リリースされました。 7.23.0 Released: Decorator Metadata and many new import features! · Babel Stage 3のDecorator Metadataのサポート、Stage 3のimport sourceのサポートが追加されています。 Stage 2のimport deferのサポート、Stage 1のOptional Chaining Assignmentのサポート、TypeScript 5.2のサポートされています。 またBabel 8がαリリースされています。 変更点やアップデート方法については、マイグレーションガイドが公開されています。 Upgrade to Babel 8 · Babel ReactやVueなどに対応したNext.jsやNuxtのよう
Prettier 3.6: Experimental fast CLI and new OXC and Hermes plugins! · Prettier
This release includes several important feature additions that we're excited to share with you. First, we're shipping a new experimental high-performance CLI behind a feature flag (--experimental-cli). This CLI was previously only available in prettier@next, but now you can enable it simply by using a flag. We encourage you to try it out and share your feedback! If you are interested in the intern
Today we are excited to announce the availability of TypeScript 5.4 Beta. To get started using the beta, you can get it through NuGet, or through npm with the following command: npm install -D typescript@beta Here’s a quick list of what’s new in TypeScript 5.4! Preserved Narrowing in Closures Following Last Assignments The NoInfer Utility Type Object.groupBy and Map.groupBy Support for require() c
More information on the syntax and semantics of decorators (optional section) # (This section is optional. If you skip it, you can still understand the remaining content.) The syntax of decorator expressions # A decorator expression starts with a chain of one or more identifiers, separated by dots. Each identifier except the first one can be private (prefix #). Square brackets [] are not allowed
MAI-Thinking-1: Building a Hill-Climbing Machine The Microsoft AI Team 1 Abstract Progress in AI is driven not by a single model, but by the ability to continually improve upon the current state of models. Achieving this requires treating model development as a system-level optimization problem, for which the solution is building a hill-climbing machine for rapid improvement. Our process includes
A few months ago we saw a post on the r/programminghorror subreddit: A developer describes the struggle of identifying a syntax error resulting from an invisible Unicode character hidden in JavaScript source code. This post inspired an idea: What if a backdoor literally cannot be seen and thus evades detection even from thorough code reviews? Just as we were finishing up this blog post, a team at
Today we’re excited to announce our Release Candidate of TypeScript 5.4! Between now and the stable release of TypeScript 5.4, we expect no further changes apart from critical bug fixes. To get started using the RC, you can get it through NuGet, or through npm with the following command: npm install -D typescript@rc Here’s a quick list of what’s new in TypeScript 5.4! Preserved Narrowing in Closur
--- name: skill-creator description: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations. license: Complete terms in LICENSE.txt --- # Skill Creator This skill provides guidance for creating effective skills. ## About Skills S
V8 Torque is a language that allows developers contributing to the V8 project to express changes in the VM by focusing on the intent of their changes to the VM, rather than preoccupying themselves with unrelated implementation details. The language was designed to be simple enough to make it easy to directly translate the ECMAScript specification into an implementation in V8, but powerful enough t
Short list of C esoterica
Mini-post: Digraphs and Trigraphs | ENOSUCHBLOG C alternative tokens - Wikipedia Why are there digraphs in C and C++? - Stack Overflow Purpose of Trigraph sequences in C++? A brief description of Normative Addendum 1 Designated initializer # These allow you to specify which elements of an object (array, structure, union) are to be initialized by the values following. The order does not matter! str
typescript-eslint is the tooling that enables standard JavaScript tools such as ESLint and Prettier to support TypeScript code. We've been working on a set of breaking changes and general features that we're excited to get released! 🎉 We'd previously blogged about v6 in Announcing typescript-eslint v6 Beta. This blog post contains much of the same information as that one, but updated for changes
State of Text Rendering 2024
Preface In 2009 I wrote State of Text Rendering, as a high-level review of the Free Software text rendering stack, with a focus on shaping, and mostly in the context of the GNOME Desktop. Since then, I have spent around twelve years working on various Google products to improve fonts and text rendering: all Open Source work. When I wrote that text in 2009, my main assignment was to finish HarfBuzz
Build strongly typed polymorphic components with React and TypeScript - LogRocket Blog
Real-world examples of polymorphic components There’s a nonzero chance you’ve already used a polymorphic component. Open source component libraries typically implement some sort of polymorphic component. Let’s consider some you may be familiar with: the Chakra UI as prop and MUI component prop. Chakra UI’s as prop How does Chakra UI implement polymorphic props? The answer is by exposing an as prop
DatadogのRust製オブザーバビリティデータパイプラインVectorを本番導入した | CyberAgent Developers Blog
この記事は Datadog Advent Calendar 2025 11日目の記事です🎄 ABEMAの広告配信システム開発チームでバックエンドを担当している黒崎 ( @kuro_m88 )です。 今年DatadogのVectorを本番環境に導入したため、その事例を共有します。 DatadogのRust製オブザーバビリティデータパイプラインVectorとは？ Vector自体はDatadogのサービスではないため、Datadogユーザの中でも初めて聞いた人は多いかもしれません。 元はTimber Technologies社が開発していて、2021年にDatadogが同社を買収し、DatadogのCommunity Open Source Engineering teamが開発するソフトウェアとなりました。 https://www.datadoghq.com/blog/datadog-ac
April 22, 2026 #Announcing Rspack 2.0 Copy Markdown We are excited to announce the official release of Rspack 2.0! #Looking back at 1.x When we released Rspack 1.0 in August 2024, we set a clear goal: deliver a 10x performance improvement while staying compatible with the webpack API and ecosystem. Looking back at the 1.x cycle, we have largely achieved that goal. Rspack not only implemented webpa
Large Text Compression Benchmark Matt Mahoney Last update: Mar. 25, 2026. history This competition ranks lossless data compression programs by the compressed size (including the size of the decompression program) of the first 109 bytes of the XML text dump of the English version of Wikipedia on Mar. 3, 2006. About the test data. The goal of this benchmark is not to find the best overall compress
Django, HTMX and Alpine.js: Modern websites, JavaScript optional
Building a modern front end in Django without reaching for a full-blown JavaScript framework. Choosing the right tools for the job, and bringing them into your project. Published November 23, 2021, Updated May, 2025 This is Part 5 of Modern JavaScript for Django Developers. Welcome back to "Modern JavaScript for Django Developers"! Previous installments of this series covered 1) organizing your fr
It’s that time of year: time to start winding down for the winter holiday season, time to reflect on the past year, and time to think about what we can accomplish together in 2024. The Wasmtime and Cranelift projects are no exception. This article recounts Wasmtime and Cranelift progress in 2023 and explores what we might do in 2024. Wasmtime is a standalone WebAssembly runtime. It is fast, secure
{ "name": "sample-4.0.3", "version": "0.1.0", "private": true, "dependencies": { "@testing-library/jest-dom": "^5.11.4", "@testing-library/react": "^11.1.0", "@testing-library/user-event": "^12.1.10", "@types/jest": "^26.0.15", "@types/node": "^12.0.0", "@types/react": "^17.0.0", "@types/react-dom": "^17.0.0", "react": "^17.0.2", "react-dom": "^17.0.2", "react-scripts": "4.0.3", "typescript": "^4.
A guide to `tsconfig.json`
Version: TypeScript 5.8 [2025-03-19] Improve section on exactOptionalPropertyTypes. [2025-03-18] Improve summary at the end. [2025-02-06] Change title. Improve section “Compiling TypeScript with tools other than tsc”. [2025-01-29] Explain the TypeScript 5.8 option erasableSyntaxOnly. I never felt confident about my tsconfig.json. To change that, I went through the official documentation, collected
Combobulate: Structured Movement and Editing with Tree-Sitter
Combobulate: Structured Movement and Editing with Tree-Sitter Combobulate is a package that adds advanced structured editing and movement to many programming modes in Emacs. Here's how it works, and how it can enrich your editing experience in Emacs. About a year ago I released an alpha – prototype, really – version of a tool I call Combobulate. I’d been using it personally for a while before I le
Prettier 3.1: New experimental ternaries formatting and Angular control flow syntax! · Prettier
This release adds indentation back to nested ternaries along with a new --experimental-ternaries flag to try a more novel "curious ternary" format that scales better to deeply nested conditionals. We are keen for your feedback on the experimental format before it rolls out as the default behavior later this year! We have also added support for the control flow syntax in Angular v17. For details on
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プロと読み解く Ruby 3.1 NEWS - クックパッド開発者ブログ
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ESLint v9.0.0 released - ESLint - Pluggable JavaScript Linter
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2023-09-29のJS: Babel v7.23.0、Vike、State of HTML 2023受付開始
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JavaScript metaprogramming with the 2022-03 decorators API
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V8 Torque user manual · V8
Announcing typescript-eslint v6 | typescript-eslint
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Large Text Compression Benchmark
Wasmtime and Cranelift in 2023
バージョン指定してcreate-react-appを実行 - Qiita