// Good: choose between two options as appropriate (see below). import * as ng from '@angular/core'; import {Foo} from './foo'; // Only when needed: default imports. import Button from 'Button'; // Sometimes needed to import libraries for their side effects: import 'jasmine'; import '@polymer/paper-button'; Import paths TypeScript code must use paths to import other TypeScript code. Paths may be r
Contents Command Line Interface Guidelines An open-source guide to help you write better command-line programs, taking traditional UNIX principles and updating them for the modern day. Authors Aanand Prasad Engineer at Squarespace, co-creator of Docker Compose. @aanandprasad Ben Firshman Co-creator Replicate, co-creator of Docker Compose. @bfirsh Carl Tashian Offroad Engineer at Smallstep, first e
三行でまとめると シグナルハンドラ内でprintf()してはいけない というより、余計な処理を書いてはいけない もう一度言う、シグナルハンドラで余計なことをするな、非常に大事なことだ はじめに シグナルハンドラでやってよい処理は非常に限られるのに、全くルールを守らないサンプルコードが世の中に大量に出回っている。printf()するなんてもってのほかなのだが、カジュアルにそこらじゅうで見かけて非常に悲しい。 この記事では、そんな状況を少しでも改善したいと思い初心者向きに書いたものだ。そのため、下記では、回避するにはどう実装すればよいのか、ルールを破るとどうなるのか、といった点を先に簡潔に記述する。 なぜしてはいけないのか、POSIXだとかリエントラントだとか、は下の方に追いやっている。玄人は読んでてウズウズするだろうが、細かい話はできるだけ目につかないような構成としたため了解いただきたい。
jQuery 4.0.0 has been in the works for a long time, but it is now ready for a beta release! There’s a lot to cover, and the team is excited to see it released. We’ve got bug fixes, performance improvements, and some breaking changes. We removed support for IE<11 after all! Still, we expect disruption to be minimal. Many of the breaking changes are ones the team has wanted to make for years, but co
TabFS
Going through the files inside a tab's folder. For example, the url.txt, text.txt, and title.txt files tell me those live properties of this tab (Read more up-to-date documentation for all of TabFS's files here.) This gives you a ton of power, because now you can apply all the existing tools on your computer that already know how to deal with files -- terminal commands, scripting languages, point-
Go: A Documentary
The historical release notes may helpful for general information: doc/go1release Go Release History doc/go1prerelease Pre-Go 1 Release History doc/go0release Weekly Release History (Before Go 1) Language Design General design/go0initial Rob Pike, Robert Griesemer, Ken Thompson. The Go Annotated Specification. Mar 3, 2008. design/go0spec0 The Go Programming Language. Language Specification. Mar 7,
Beyond Console.log() – Level up Your Debugging Skills — SitePoint
Stay Relevant and Grow Your Career in TechPremium ResultsPublish articles on SitePointDaily curated jobsLearning PathsDiscounts to dev toolsStart Free Trial7 Day Free Trial. Cancel Anytime. You may have established a pattern of coding that utilizes a few key tools offered by your browser’s console. But have you dug any deeper lately? There are some powerful tools available to you, and they might j
This post is about why we need a coroutine package for Go, and what it would look like. But first, what are coroutines? Every programmer today is familiar with function calls (subroutines): F calls G, which stops F and runs G. G does its work, potentially calling and waiting for other functions, and eventually returns. When G returns, G is gone and F continues running. In this pattern, only one fu
Kernel Queue: The Complete Guide On The Most Essential Technology For High-Performance I/O When talking about high-performance software we probably think of server software (such as nginx) which processes millions requests from thousands clients in parallel. Surely, what makes server software work so fast is high-end CPU running with huge amount of memory and a very fast network link. But even the
Linux Hardening Guide | Madaidan's Insecurities
Last edited: March 19th, 2022 Linux is not a secure operating system. However, there are steps you can take to improve it. This guide aims to explain how to harden Linux as much as possible for security and privacy. This guide attempts to be distribution-agnostic and is not tied to any specific one. DISCLAIMER: Do not attempt to apply anything in this article if you do not know exactly what you ar
I recently realized stdout is much faster than stderr for Rust. Here are my findings after diving deep into this rabbit hole. I have been using the terminal (i.e. command-line) for most of my day-to-day things for a while now. I was always fascinated by the fact that how quick and convenient the command-line might be and that's why I'm a proponent of using CLI (command-line) or TUI (terminal user
はじめに 今回はparserの生成物である構文木についてのお話です。 普段は主にparserとlexerについて考えていますが、たまに構文木について考えを巡らすこともあります。 むしろparserの目指すべき実装が固まったいまだからこそ、その主な生成物である構文木の設計について考える必要があるとも言えます。 Rubyのparserの実装は複数あり、それぞれのparserが生成する構文木もまた微妙に異なります。 それらの構文木は各parserのユースケースに合わせてアドホックに必要な要素が追加されているように見え、なにか原理原則に従っているように思えませんでした。 そのため果たして構文木に設計というものがあるのだろうかという疑問をずっと抱いていました。 Rubyの開発ではユースケースを収集し、それらのユースケースに対してどのくらい応えられているかをもって設計の良し悪しを確認するというアプロー
The Development of the C Language* Dennis M. Ritchie Bell Labs/Lucent Technologies Murray Hill, NJ 07974 USA dmr@bell-labs.com ABSTRACT The C programming language was devised in the early 1970s as a system implementation language for the nascent Unix operating system. Derived from the typeless language BCPL, it evolved a type structure; created on a tiny machine as a tool to improve a meager progr
An introduction to WebAssembly for JavaScript Developers
If you transmit a number whereas an integer encoded on 64 bits is expected you will get an exception: let run = async () => { try { let bytecode = await fetch("add/add.wasm"); let wasm = await WebAssembly.instantiateStreaming(bytecode); console.log(wasm.instance.exports.addInt64(1,2)); } catch(e) { console.error(e); } }; > run().then(); TypeError: wasm function signature contains illegal type Call
`undefined` vs. `null` revisited
Many programming languages have one “non-value” called null. It indicates that a variable does not currently point to an object – for example, when it hasn’t been initialized yet. In contrast, JavaScript has two such non-values: undefined and null. In this blog post, we examine how they differ and how to best use or avoid them. undefined vs. null # Both values are very similar and often used inte
Go 1.21 includes a preview of a change to for loop scoping that we plan to ship in Go 1.22, removing one of the most common Go mistakes. The Problem If you’ve written any amount of Go code, you’ve probably made the mistake of keeping a reference to a loop variable past the end of its iteration, at which point it takes on a new value that you didn’t want. For example, consider this program: func ma
Programming is an iterative process - as much as we would like to come up with the perfect solution from the start, it rarely works that way. Good programs often start as quick prototypes. The bad ones stay prototypes, but the best ones evolve into production code. Whether you’re writing games, CLI tools, or designing library APIs, prototyping helps tremendously in finding the best approach before
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
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open source. We provide some benchmarks, perspective, why we did this in the first place and what it cost us with exciting ideas from Hyrum’s Law to reinforcement learning. All changes went into open source and thus I can
Hypershell: A Type-Level DSL for Shell-Scripting in Rust | Context-Generic Programming
Discuss on Reddit, Lobsters, and Hacker News. Summary I am thrilled to introduce Hypershell, a modular, type-level domain-specific language (DSL) for writing shell-script-like programs in Rust. Hypershell is powered by context-generic programming (CGP), which makes it possible for users to extend or modify both the language syntax and semantics. Table of Contents Estimated reading time: 1~2 hours
この記事は LayerX のエンジニアブログがたくさん出る #ベッテク月間 の8記事目になります。こちらのカレンダーに、これまでの記事と今後出る予定がまとまっています。 LayerX のバクラク事業部には GraphQL Gateway というバクラク全プロダクトから参照される GraphQL スキーマが存在します[1]。今回の記事は、その GraphQL Gateway のスキーマをより良い状態にしていくためにぶつかった課題を強引に突破したときの話です。 モチベーション GraphQL スキーマの破壊的変更によって GraphQL Document がスキーマに適合しなくなる場合、そのリクエストはエラーになります。例えば以下のようなケースが考えられます： 使わなくなったフィールドを削除したい 削除されたフィールド（存在しないフィールド）を含む Document を処理することはできない
Gamedev in Lisp. Part 1: ECS and Metalinguistic Abstraction - cl-fast-ecs by Andrew
Gamedev in Lisp. Part 1: ECS and Metalinguistic Abstraction In this series of tutorials, we will delve into creating simple 2D games in Common Lisp. The result of the first part will be a development environment setup and a basic simulation displaying a 2D scene with a large number of physical objects. It is assumed that the reader is familiar with some high-level programming language, has a gener
What's New In DevTools (Chrome 90) | Blog | Chrome for Developers
New CSS flexbox debugging tools DevTools now has dedicated CSS flexbox debugging tools! When an HTML element on your page has display: flex or display: inline-flex applied to it, you can see a flex badge next to it in the Elements panel. Click the badge to toggle the display of a flex overlay on the page. In the Styles pane, you can click on the new icon next to the display: flex or display: inlin
Onyx, a new programming language powered by WebAssemblyLearn about Onyx, a new imperative programming language that leverages WebAssembly and Wasmer for seamless cross-platform support What is Onyx? Onyx is a new programming language featuring a modern, expressive syntax, strict type safety, blazingly-fast build times, and out-of-the-box cross platform support thanks to WebAssembly. Over the past
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
Internet Engineering Task Force (IETF) K. Davis Request for Comments: 9562 Cisco Systems Obsoletes: 4122 B. Peabody Category: Standards Track Uncloud ISSN: 2070-1721 P. Leach University of Washington May 2024 Universally Unique IDentifiers (UUIDs) Abstract This specification defines UUIDs (Universally Unique IDentifiers) -- also known as GUIDs (Globally Unique IDentifiers) -- and a Uniform Resou
Weird Lexical Syntax
I just learned 42 programming languages this month to build a new syntax highlighter for llamafile. I feel like I'm up to my eyeballs in programming languages right now. Now that it's halloween, I thought I'd share some of the spookiest most surprising syntax I've seen. The languages I decided to support are Ada, Assembly, BASIC, C, C#, C++, COBOL, CSS, D, FORTH, FORTRAN, Go, Haskell, HTML, Java,
CUPID: for joyful coding
What started as lighthearted iconoclasm, poking at the bear of SOLID, has developed into something more concrete and tangible. If I do not think the SOLID principles are useful these days, then what would I replace them with? Can any set of principles hold for all software? What do we even mean by principles? I believe that there are properties or characteristics of software that make it a joy to
When people say “debuggers are useless and using logging and unit-tests is much better,” I suspect many of them think that debuggers can only put breakpoints on certain lines, step-step-step through the code, and check variable values. While any reasonable debugger can indeed do all of that, it’s only the tip of the iceberg. Think about it; we could already step through the code 40 years ago, sure
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
Fast Rust Builds
Sep 4, 2021 It’s common knowledge that Rust code is slow to compile. But I have a strong gut feeling that most Rust code out there compiles much slower than it could. As an example, one fairly recent post says: With Rust, on the other hand, it takes between 15 and 45 minutes to run a CI pipeline, depending on your project and the power of your CI servers. This doesn’t make sense to me. rust-analyz
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.67.1: The update addresses this security issue. Update 1.67.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the April 2022 release of Visual Studio Code. There are many updates in this version that we hope
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
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
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
Highlights This is a summary of the significant changes, both breaking and non-breaking, you need to know about when upgrading from ESLint v8.x to ESLint v9.0.0. Installing Because this is a major release, you may not automatically be upgraded by npm. To ensure you are using this version, run: npm i eslint@9.0.0 --save-dev Copy code to clipboard Migration Guide As there are a lot of changes, we’ve
Note: I received a lot of great feedback from the discussions at Mastodon and Hacker News, so I've updated the post with some improvements to the font! I've also added some further examples and acknowledgements at the end. 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
A decision that arises over and over when designing concurrent programs is whether to represent program state in control flow or as data. This post is about what that decision means and how to approach it. Done well, taking program state stored in data and storing it instead in control flow can make programs much clearer and more maintainable than they otherwise would be. Before saying much more,
How To Build An Agent | Amp
How to Build an Agent or: The Emperor Has No Clothes Thorsten Ball, April 15, 2025 It’s not that hard to build a fully functioning, code-editing agent. It seems like it would be. When you look at an agent editing files, running commands, wriggling itself out of errors, retrying different strategies - it seems like there has to be a secret behind it. There isn’t. It’s an LLM, a loop, and enough tok
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Google TypeScript Style Guide
Command Line Interface Guidelines
シグナルハンドラにprintf()を書いてはいけない - Qiita
jQuery 4.0.0 BETA! | Official jQuery Blog
research!rsc: Coroutines for Go
Kernel Queue: The Complete Guide On The Most Essential Technology For High-Performance I/O
Why stdout is faster than stderr? - Orhun's Blog
Ruby Parser開発日誌 (19) - 最高の構文木の設計 2024年版 - かねこにっき
The Development of the C Language
Fixing For Loops in Go 1.22 - The Go Programming Language
Prototyping in Rust | corrode Rust Consulting
Changing std::sort at Google’s Scale and Beyond
GraphQL 界の Babel こと Envelop を使ってスキーマの破壊的変更をごまかす
Onyx, a new programming language powered by WebAssembly · Blog · Wasmer
Object Structure in JavaScript Engines
RFC 9562: Universally Unique IDentifiers (UUIDs)
What a good debugger can do 🔮
April 2022 (version 1.67)
ESLint v9.0.0 released - ESLint - Pluggable JavaScript Linter
Font with Built-In Syntax Highlighting
research!rsc: Storing Data in Control Flow