JavaScriptの仕様であるECMAScriptはEcma Internationalによって定められています。ECMAScript 2015（ES6）の登場以降は、ECMAScript 2016、ECMAScript 2017･･･と、年次で仕様が更新されています。ECMAScript 2022（ES2022）は2022年6月22日のEcma InternationalのGA 123rd meetingにて、ECMAScript 2023（ES2023）は2023年6月27日のGA 125th meetingで承認されました。 ES2022とES2023はすでに多くのブラウザやNode.js環境で利用可能です。本記事では新仕様と使いどころを紹介します。 ES2023 - 配列の非破壊操作 ES2023では配列を非破壊で操作できるメソッドが追加されています。非破壊とは、元の配列を変更せ
NestJSをゼロから学ぶ - TypeORMの活用などをREST APIの実装から身に付けよう【Node.jsフレームワークの基本】｜ハイクラス転職・求人情報サイト アンビ（AMBI）
このようにさまざまなデコレータが用意されていますが、今回はサンプルで利用するデコレータに絞って説明します。他のデコレータについては、NestJSの公式ドキュメントなどを参照してください。 依存性注入（DI） 依存性注入（DI、Dependency Injection）とは、クラスの依存関係を解決する仕組みです。NestJSでは、依存性注入を使ってクラスの依存関係を解決します。 クラスの依存関係とは、クラスが他のクラスに依存している関係のことです。例えば、次のようなクラスAがあったとします。このクラスは他のクラスに依存していません。@Injectable()デコレータを使って、サービスを定義します。 @Injectable() class A { constructor() {} } そして、次のようなクラスBがあったとします。このクラスは、@Inject()デコレータを使って依存性を注入し
AWS CDKを始めるハンズオン ─ IaCの第一歩をAWS LambdaとDynamoDBのシンプルな仕組みで学ぶ｜ハイクラス転職・求人情報サイト アンビ（AMBI）
AWS CDKを始めるハンズオン ─ IaCの第一歩をAWS LambdaとDynamoDBのシンプルな仕組みで学ぶ アマゾン ウェブ サービスが提供するIaC（Infrastructure as Code）の開発キットがAWS CDK（AWS Cloud Development Kit）です。本記事はAWS CDK入門者向けのチュートリアルとして、AWSでソリューションアーキテクトを務める吉川幸弘（@WinterYukky）さんによる、AWS Lambda関数でDynamoDBテーブルをスキャンするシンプルなハンズオンです。 みなさん、こんにちは。アマゾン ウェブ サービス ジャパン合同会社でソリューションアーキテクトを務めている吉川幸弘と申します。私は普段、西日本のお客様を中心に技術的なご支援や課題解決などをしています。 さっそくですが、みなさんはInfrastructure as C
September 29, 2021 by Henning Dieterichs, @hediet_dev When dealing with deeply nested brackets in Visual Studio Code, it can be hard to figure out which brackets match and which do not. To make this easier, in 2016, a user named CoenraadS developed the awesome Bracket Pair Colorizer extension to colorize matching brackets and published it to the VS Code Marketplace. This extension became very popu
Today we’re excited to announce the release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript smaller, simpler, and faster. We’ve implemented the new decorators standard, added functionality to better support ESM projects in Node and bundlers, provided new ways for library authors to control generic inference, expanded our JSDoc functionality, simplified con
1. はじめに JavaScriptデザインパターンは、JavaScriptを使ってプログラムを書くときによく出くわす問題を解決するためのガイドです。これらのパターンの背後にある考え方を理解することで、自分の問題に適用することができます。また、これらのパターンが自分のコードに役立つ場合を見つけることもできます。 2. モジュールパターン モジュールパターンは、JavaScriptのモジュールシステムの一部で、データを保護する方法を提供します。これは、モジュール内のプライベートなデータと動作を保護し、一方で公開APIを提供する方法です。これにより、プライベートとパブリックのアクセスレベルを持つ自己完結型のモジュールオブジェクトを作成することができます。 これは、JavaやC++のような言語でクラスにアクセス修飾子を使用するのに似ています。 JavaScriptでは、クロージャを使用してモジュ
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
As you can see, these codebases get a better speedup from dedicating more cores, but results will differ across projects and underlying machines. On the other hand, on machines with fewer CPU cores and less memory (e.g. CI runners) you may want to decrease this number to avoid unnecessary or incidental overhead. You can specify a value as low as --checkers 1, effectively making type-checking singl
Node.js has undergone a remarkable transformation since its early days. If you’ve been writing Node.js for several years, you’ve likely witnessed this evolution firsthand—from the callback-heavy, CommonJS-dominated landscape to today’s clean, standards-based development experience. The changes aren’t just cosmetic; they represent a fundamental shift in how we approach server-side JavaScript develo
WebKit Features in Safari 16.4
Mar 27, 2023 by Patrick Angle, Marcos Caceres, Razvan Caliman, Jon Davis, Brady Eidson, Timothy Hatcher, Ryosuke Niwa, and Jen Simmons ContentsWeb Push on iOS and iPadOSImprovements for Web AppsWeb ComponentsCSSHTMLJavaScript and WebAssemblyWeb APIImages, Video, and AudioWKWebViewDeveloper ToolingWeb InspectorSafari Web ExtensionsSafari Content BlockersNew Restrictions in Lockdown ModeMore Improve
IDEs CLion DataGrip DataSpell Fleet GoLand IntelliJ IDEA PhpStorm PyCharm RustRover Rider RubyMine WebStorm Plugins & Services Big Data Tools Code With Me JetBrains Platform Scala Toolbox App Writerside JetBrains AI Grazie Junie JetBrains for Data Kineto Team Tools Datalore Space TeamCity Upsource YouTrack Hub Qodana CodeCanvas Matter .NET & Visual Studio .NET Tools ReSharper C++ Languages & Frame
はじめに こんにちは、ZOZOTOWN開発2部Androidブロックの小林（@kako_351）です。普段はZOZOTOWN Androidアプリの開発を担当しています。今年の3月に入社して機能改修や既存機能の調査などの業務に携わってきました。その中でZOZOTOWN Androidアプリについて知見を持っていないため、調査や開発の際に学習コストがかかるといった課題が見えてきました。本記事ではAndroidアプリの実装を把握するアプローチをご紹介します。 目次 はじめに 目次 背景 実装を把握するアプローチの全体像 ドキュメントの把握 目的 アプローチ モジュール構成や画面遷移などの全体構造の把握 目的 モジュール構成 画面遷移 アーキテクチャの把握 目的 アプローチ ライブラリや使用技術の把握 目的 アプローチ ビルドやデプロイなどCI/CD環境の把握 目的 アプローチ テストの把握 目
Cloudflare Workers + Hono ワークショップ - ServerlessDays Tokyo 2023
Cloudflare Workers + Hono ワークショップ 資料はこちら => workshops.yusuke.run #serverlessdays Yusuke Wada 2023-09-24 ServerlessDays Tokyo 2023 workshops.yusuke.run アジェンダ ワークショップについて Workers イントロダクション Hono イントロダクション 基本編 プロキシ編 Web API編 フルスタック編 AI編 Honoをより深く知る その他 1. ワークショップについて 1.1 対象 対象者 Cloudflareでのアプリケーション作成に興味のある方 Honoを使ってみたい方 フロント、バックエンド問いません 前提条件 Wranglerが動く環境をつくっておく npx wrangler が動く JavaScriptに対する知識があるとよい
Today we’re excited to announce the release of TypeScript 4.5! If you’re not yet familiar with TypeScript, it’s a language that builds on JavaScript by adding statically checked types. When you use static types, you can run the TypeScript compiler to check for bugs like typos and mismatches in the shapes of your data, and get handy suggestions. These types don’t change your program, and you can re
Today we are absolutely thrilled to announce the release of TypeScript 7.0 Beta! If you haven’t been following TypeScript 7.0’s development, this release is significant in that it is built on a completely new foundation. Over the past year, we have been porting the existing TypeScript codebase from TypeScript (as a bootstrapped codebase that compiles to JavaScript) over to Go. With a combination o
Jake Donham > Technical Difficulties > Reconstructing TypeScript, part 0 Reconstructing TypeScript, part 0: intro and background2021-09-07I've been building a "document development environment" called Programmable Matter that supports live code embedded in documents, with a simple TypeScript-like programming language. It's been fun figuring out how to implement it—the type system in TypeScript is
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
ロマン構成が動いたので紹介します。 コード: https://github.com/mizchi/absurd-sql-example-with-typeorm デモ: https://heuristic-perlman-94f8f4.netlify.app tldr Steam の某クリッカーゲームをやってたら放置ゲーでも作りたい気分になってきた。 複雑なデータを管理するならブラウザ内に本物の sqlite を持ってきたい sqlite は持ってこれたけど TS の中で 生 SQL 書くのがだるかった(補完支援がない)ので ORM でラップしたい Typeorm + absurd-sql の構成を試したら色々大変だったけど動いた つまりブラウザでこのコードが動く。 // ... @Entity() class User { @PrimaryGeneratedColumn() id: nu
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
Patterns for Reactivity with Modern Vanilla JavaScript – Master.dev Blog
“Reactivity” is how systems react to changes in data. There are many types of reactivity, but for this article, reactivity is when data changes, you do things. Reactivity Patterns are Core to Web Development We handle a lot with JavaScript in websites and web apps since the browser is an entirely asynchronous environment. We must respond to user inputs, communicate with servers, log, perform, etc.
Today we’re excited to announce our beta release of TypeScript 5.0! This release brings many new features, while aiming to make TypeScript, smaller, simpler, and faster. We’ve implemented the new decorators standard, functionality to better support ESM projects in Node and bundlers, new ways for library authors to control generic inference, expanded our JSDoc functionality, simplified configuratio
ts-blank-space
What is ts-blank-space? ts-blank-space is a fast type-stripping compiler that converts TypeScript to JavaScript. It supports a modern subset of TypeScript by erasing the types and replacing them with whitespace. That's it. It is not a type checker and does not perform any other code transformations. The underlying technique can improve build performance and simplify development. The implementation
The story of web framework Hono, from the creator of Hono
The story of web framework Hono, from the creator of Hono2024-10-17 Hono is a fast, lightweight web framework that runs anywhere JavaScript does, built with Web Standards. Of course, it runs on Cloudflare Workers. It was three years ago, in December 2021. At that time, I wanted to create applications for Cloudflare Workers, but the code became verbose without using a framework, and couldn't find a
Today we’re excited to announce the release of TypeScript 5.2! 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
WebKit Features in Safari 17.0
Sep 18, 2023 by Jen Simmons and the Safari / WebKit Team Today’s the day for Safari 17.0. It’s now available for iOS 17 and iPadOS 17. [Update September 26th] And now, Safari 17.0 is available for macOS Ventura, and macOS Monterey, and macOS Sonoma. Safari 17.0 is also available in the vision OS Simulator, where you can test your website by downloading the latest beta of Xcode 15, which supports t
Today we are excited to announce the availability of TypeScript 4.9! If you’re not familiar with TypeScript, it’s a language that builds on JavaScript by adding types and type-checking. Types can describe things like the shapes of our objects, how functions can be called, and whether a property can be null or undefined. TypeScript can check these types to make sure we’re not making mistakes in our
Object Structure in JavaScript EnginesFrom a developer's perspective, objects in JavaScript are quite flexible and understandable. We can add, remove, and modify object properties on our own. However, few people think about how objects are stored in memory and processed by JS engines. Can a developer's actions, directly or indirectly, impact performance and memory consumption? Let's try to delve i
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
WebKit Features in Safari 17.4
ContentsArchitectural improvementsWeb AppsForm elementsCSSWeb APIJavaScriptMediaSVGWebGLWeb AssemblyWeb InspectorChanges to SafariSafari ExtensionsWeb AuthenticationBug Fixes and moreUpdating to Safari 17.4Feedback Just like Safari 15.4 and Safari 16.4, this March’s release of Safari 17.4 is a significant one for web developers. We’re proud to announce another 46 features and 146 bug fixes. You ca
Today we’re excited to announce the release of TypeScript 5.8! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by adding syntax for 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 editor tooling like the auto
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
AST vs. Bytecode: Interpreters in the Age of Meta-Compilation
233 AST vs. Bytecode: Interpreters in the Age of Meta-Compilation OCTAVE LAROSE, University of Kent, UK SOPHIE KALEBA, University of Kent, UK HUMPHREY BURCHELL, University of Kent, UK STEFAN MARR, University of Kent, UK Thanks to partial evaluation and meta-tracing, it became practical to build language implementations that reach state-of-the-art peak performance by implementing only an interprete
Today we’re excited to announce our Release Candidate of TypeScript 5.2! Between now and the stable release of TypeScript 5.2, 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 5.2! using Declarations and Explic
Introducing humanfs (formerly fsx): A modern filesystem API for JavaScript - Human Who Codes
The JavaScript APIs we have today are so much better than those we had even a decade ago. Consider the transition for XMLHttpRequest to fetch(): the developer experience is dramatically better, allowing us to write more succinct, functional code that accomplishes the same thing. The introduction of promises for asynchronous programming allowed this change, along with a series of other changes that
MemLab: An open source framework for finding JavaScript memory leaks
MemLab: An open source framework for finding JavaScript memory leaks We’ve open-sourced MemLab, a JavaScript memory testing framework that automates memory leak detection. Finding and addressing the root cause of memory leaks is important for delivering a quality user experience on web applications. MemLab has helped engineers and developers at Meta improve user experience and make significant imp
Announcing Dart 3
Hello from Google I/O 2023. Today, live from Mountain View, we’re announcing Dart 3 — the largest Dart release to date! Dart 3 contains three major advancements. First, we’ve completed the journey to 100% sound null safety. Second, we’ve added major new language features for records, patterns, and class modifiers. Third, we’re giving a preview of the future, where we broaden our platform support w
Introduction Java Naming and Directory Interface (JNDI) is a Java API that allows clients to discover and look up data and objects via a name. These objects can be stored in different naming or directory services, such as Remote Method Invocation (RMI), Common Object Request Broker Architecture (CORBA), Lightweight Directory Access Protocol (LDAP), or Domain Name Service (DNS). In other words, JND
WebKit Features in Safari 18.0
ContentsNew in Safari 18Web apps for MacCSSSpatial WebHTMLJavaScriptWeb APICanvasManaged Media SourceWebRTCHTTPSWebGLWeb InspectorPasskeysSafari ExtensionsApple PayDeprecationsBug Fixes and moreUpdating to Safari 18.0Feedback Safari 18.0 is here. Along with iOS 18, iPadOS 18, macOS Sequoia and visionOS 2, today is the day another 53 web platform features, as well as 25 deprecations and 209 resolve
Syntax Highlighting in Hand-Coded Websites The problem I have been trying to identify practical reasons why hand-coding websites with HTML and CSS is so hard (by hand-coding, I mean not relying on frameworks, generators or 3rd party scripts that modify the DOM). Let's say, I want to make a blog. What are the actual things that prevent me from making—and maintaining—it by hand? What would it take t
Parsing SQL - Strumenta
The code for this tutorial is on GitHub: parsing-sql SQL is a language to handle data in a relational database. If you worked with data you have probably worked with SQL. In this article we will talk about parsing SQL. It is in the same league of HTML: maybe you never learned it formally but you kind of know how to use it. That is great because if you know SQL, you know how to handle data. However
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
JavaScriptのES2023・ES2022の新機能まとめ - ICS MEDIA
Bracket pair colorization 10,000x faster
Announcing TypeScript 5.0 - TypeScript
JavaScriptデザインパターン入門 - Qiita
Introducing Deopt Explorer - TypeScript
Announcing TypeScript 7.0 - TypeScript
Modern Node.js Patterns for 2025
JavaScript Best Practices | The WebStorm Blog
大規模なAndroidアプリの実装を紐解いていくアプローチ - ZOZO TECH BLOG
Announcing TypeScript 4.5 - TypeScript
Announcing TypeScript 7.0 Beta - TypeScript
Reconstructing TypeScript, part 0: intro and background
Announcing TypeScript 4.7 - TypeScript
typeorm + absurd-sql on Browser のロマン構成
Announcing TypeScript 4.7 Beta - TypeScript
Announcing TypeScript 5.0 Beta - TypeScript
Announcing TypeScript 5.2 - TypeScript
Announcing TypeScript 4.9 - TypeScript
Object Structure in JavaScript Engines
Announcing TypeScript 5.8 - TypeScript
Announcing TypeScript 5.2 RC - TypeScript
Exploiting JNDI Injections in Java | Veracode
Font with Built-In Syntax Highlighting