概要 Haskellとは 関数型言語 純粋関数型言語 インストール Haskell Stack Hello world 基本 予約語 コメント ブロック レイアウト 入出力 型 変数 数値 文字(Char) 文字列(String) エスケープシーケンス リスト([...]) タプル((...)) 演算子 関数 演算子定義 再帰関数 ラムダ式 パターンマッチ ガード条件 関数合成(.) 引数補足(@) 制御構文 do文 let文 if文 case文 where文 import文 ループ データ型 データ型(列挙型) データ型(タプル型) データ型(直和型) 新型定義 (newtype) 型シノニム (type) 型クラス (class) メイビー(Maybe) ファンクタ(Functor) アプリケイティブ(Applicative) モナド(Monad) モジュール (module) 高階関
関数名、メソッド名、変数名でよく使う英単語のまとめ
プログラミングをしていると関数名、メソッド名、変数名をどうするか悩みます。 ロジックより命名に時間を費やすこともざらにあります。翻訳したり、一般的な命名規則なのかいつも検索して大変です。 よく使うサイトの内容をコピってメモしておく 関数名とメソッド名の違いについて よく使う英単語のまえに、いつもごっちゃにして使っているけど、定義はこんな感じ 「関数」と「メソッド」の違い 似ているところ どちらも何か（引数）を入れると処理をして何か（戻り値）を返してくれます。 違うところ やってること自体は大差ありません。概念としては違います。 メソッドはオブジェクト指向で登場する用語で、オブジェクトの動作を定義したものです。 まずオブジェクトありきなのですね。一方の関数は、オブジェクト云々は関係ありません。 個人的な使い分け Java で登場する関数は「メソッド」です。C 言語で登場する関数は「関数」と呼
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
プロと読み解くRuby 3.4 NEWS テクノロジー部門技術基盤グループの笹田（ko1）と遠藤（mame）です。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、恒例のクリスマスリリースとして、Ruby 3.4.0 がリリースされました（Ruby 3.4.0 リリース ）。今年も STORES Product Blog にて Ruby 3.4 の NEWS.md ファイルの解説をします（ちなみに、STORES Advent Calendar 2024 の記事になります。他も読んでね）。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
Developers are increasingly relying on AI coding assistants to accelerate our daily workflows. These tools can autocomplete functions, suggest bug fixes, and even generate entire modules or MVPs. Yet, as many of us have learned, the quality of the AI’s output depends largely on the quality of the prompt you provide. In other words, prompt engineering has become an essential skill. A poorly phrased
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
Introducing Ezno
Ezno is an experimental compiler I have been working on and off for a while. In short, it is a JavaScript compiler featuring checking, correctness and performance for building full-stack (rendering on the client and server) websites. This post is just an overview of some of the features I have been working on which I think are quite cool as well an overview on the project philosophy ;) It is still
Modern Emacs Typescript Web (React) Config with lsp-mode, treesitter, tailwind, TSX & more - Ovi Stoica
Table of Contents Introduction Part 1: Treesitter for Typescript & TSX LSP Support Completion setup Linter setup LSP Setup Eslint (Optional) Tailwind LSP Server LSP Performance Emacs LSP Booster Structural editing Formatting buffers with Prettier Other resources Conclusion Introduction I've worked within the JS ecosystem for the past 8 years using editors like Webstorm and VSCode, I started using
鈴木たかのりです。今月のPython Monthly Topicsでは、Python 3.10から導入されたBetter error messagesについて紹介します。Better error messagesがどういったものであるかの紹介と、どのようにこのエラーメッセージが出力されているか、Python内部の処理についても触れようと思います。 Better error messagesとは Python 3.10からBetter error messagesという機能が追加されました。この機能は名前のとおり「エラーメッセージを改善」するものです。「エラーメッセージの改善」により以前よりもわかりやすいエラーメッセージが出力され、ユーザーがエラーの意味に気づきやすくなりました。 例として、以下のようなリストの閉じカッコ（]）を忘れたコードを実行し、出力されるエラーメッセージを見比べてみま
Go is still not good
Previous posts Why Go is not my favourite language and Go programs are not portable have me critiquing Go for over a decade. These things about Go are bugging me more and more. Mostly because they’re so unnecessary. The world knew better, and yet Go was created the way it was. For readers of previous posts you’ll find some things repeated here. Sorry about that. Error variable scope is forced to b
Today we’re excited to announce the release of TypeScript 4.8! If you’re not yet familiar with TypeScript, it’s a language that builds on JavaScript and adds syntax for types. These types let you put your expectations and assumptions into your code, and those assumptions can then be checked by the TypeScript type-checker. This checking can help avoid typos, calling uninitialized values, mixing up
September 2021 Summary: Python 3.10, which is due out in early October 2021, will include a large new language feature called structural pattern matching. This article is a critical but (hopefully) informative presentation of the feature, with examples based on real-world code. Go to: What it is | Where it shines | My code | Other projects | Problems | Wrapping up At a recent local Python meetup,
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,
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
Rust is an appealing language for building user interfaces for a variety of reasons, especially the promise of delivering both performance and safety. However, finding a good architecture is challenging. Architectures that work well in other languages generally don’t adapt well to Rust, mostly because they rely on shared mutable state and that is not idiomatic Rust, to put it mildly. It is sometim
Motivation Introduction User input strace Printing non-printable stty raw -echo -isig UTF-8 Conclusion Motivation This blog series explains how modern terminals and command-line tools work. The primary goal here is to learn by experimenting. I’ll provide Linux tools to debug every component mentioned in the discussion. Our focus is to discover how things work. For the explanation of why things wor
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
Today we’re announcing our beta release of TypeScript 4.8! To get started using the beta, you can get it through NuGet, or- use npm with the following command: npm install -D typescript@beta You can also get editor support by Downloading for Visual Studio 2022/2019 Following directions for Visual Studio Code. Here’s a quick list of what’s new in TypeScript 4.8! Improved Intersection Reduction, Uni
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
building-software.md
building-software.md Some thoughts on building software Lately I have been busy reading some new books on Domain Driven Design (DDD) and software architecture -- including a short yet eye-opening one in Python and a great one in F#. At the same time, it seems that more people in the Functional Programming world are looking at more formal approaches to modelling -- some examples here. This has brou
It is December. That means annoying Christmas things are everywhere, including but not limited to the annual programming semi-competition known as Advent of Code. The problem with Advent of Code is that it is a waste of time. Most of the puzzles are in the realm of either string processing (somewhat applicable to programming), logic puzzles (not really applicable to most programming), or stupid go
Lean for JavaScript DevelopersSeptember 2, 2025 This is my opinionated syntax primer for the Lean programming language. It is far from complete and may contain inaccuracies (I’m still learning Lean myself) but this is how I wish I was introduced to it, and what I wish was clarified. Why Lean? This post assumes you’re already eager to learn a bit of Lean. For motivation, I humbly submit to you two
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
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.66.1: The update addresses these issues. Update 1.66.2: The update addresses these security issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the March 2022 release of Visual Studio Code. There are many updates in this version that we ho
Solving Quantitative Reasoning Problems With Language Models
Solving Quantitative Reasoning Problems with Language Models Aitor Lewkowycz∗, Anders Andreassen†, David Dohan†, Ethan Dyer†, Henryk Michalewski†, Vinay Ramasesh†, Ambrose Slone, Cem Anil, Imanol Schlag, Theo Gutman-Solo, Yuhuai Wu, Behnam Neyshabur∗, Guy Gur-Ari∗, and Vedant Misra∗ Google Research Abstract Language models have achieved remarkable performance on a wide range of tasks that require
とほほのHaskell入門 - とほほのWWW入門
概要 Haskellとは 関数型言語 純粋関数型言語 インストール Haskell Stack Hello world 基本 予約語 コメント ブロック レイアウト 入出力 型 変数 数値 文字(Char) 文字列(String) エスケープシーケンス リスト([...]) タプル((...)) 演算子 関数 演算子定義 再帰関数 ラムダ式 パターンマッチ ガード条件 関数合成(.) 引数補足(@) 制御構文 do文 let文 if文 case文 where文 import文 ループ データ型 データ型(列挙型) データ型(タプル型) データ型(直和型) 新型定義 (newtype) 型シノニム (type) 型クラス (class) メイビー(Maybe) ファンクタ(Functor) アプリケイティブ(Applicative) モナド(Monad) モジュール (module) 高階関
Today we’re excited to announce our Release Candidate (RC) of TypeScript 4.8. Between now and the stable release of TypeScript 4.8, 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 -D typescript@rc You can also get editor support by Downloading for Visual Studio 2022/2019 Follow
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
The Andrej Karpathy episode. Andrej explains why reinforcement learning is terrible (but everything else is much worse), why model collapse prevents LLMs from learning the way humans do, why AGI will just blend into the previous ~2.5 centuries of 2% GDP growth, why self driving took so long to crack, and what he sees as the future of education. Watch on YouTube; listen on Apple Podcasts or Spotify
In "Software Engineering - The Soft Parts" Addy Osmani shares lessons from his first 10 years at Google on the "soft skills" that can help engineers become effective and scale their effectiveness. This guidance should help junior, mid-career and even senior developers move forward, deal with changing technology, and navigate building non-trivial systems. Today I'll share some of the software engin
こんにちは、R&Dチームの齋藤（@aznhe21）です。 今日はオプティムの創立記念パーティーがオンラインで行われます。 オプティムは2000/6/8に設立され、去年は20周年の節目であったにも関わらず生憎の時制で大きく祝えませんでしたが、 今年は準備も万全、盛大にお祝いしたいと思います。 さて、本日、日本時間6/18(金)、Rust 1.53がリリースされました。 この記事ではRust 1.53での変更点を詳しく紹介します。 6/18は京大の前身・京都帝国大学創立の日 ピックアップ 識別子にASCII以外の文字も使えるようになった ORパターンが使えるようになった 配列にIntoIteratorが実装された 安定化されたAPIのドキュメント AtomicBool::fetch_update サンプル AtomicPtr::fetch_update サンプル BTreeMap::retai
Explicit Resource Management: Exploring JavaScript's and TypeScript's new feature | iliazeus
One of my favorite new features of JavaScript and TypeScript is explicit resource management. It brings new syntax, using foobar = ..., that enables RAII, reducing boilerplate when managing the lifecycle of various resources. In this article, I will explore this feature as implemented in TypeScript 5.2.0 with the disposablestack polyfill. I will mention both sync and async resources, DisposableSta
はじめに 基礎技術研究部リサーチエンジニアの末吉です。 HTTP リクエストスマグリング(HTTP Request Smuggling: HRS)の CVE 登録数を見ると、最初に発表された 2005 年に大量に登録されて以降は下火傾向で、2018 年までは毎年数件ずつ登録される程度でした*1。 ところが 2019 年から再燃し、今年に至るまで再び大量に登録されだしています。 上記は CVE の登録数だけを見た傾向ですが、実際 HTTP リクエストスマグリングは 2019 年を境に急激に発展し、今年に至るまで毎年様々な新手法が発表され、注目を浴びています。 ただ、その割には日本語で HTTP リクエストスマグリングを扱った記事は少なく、この名前を聞いたこともないという方もそこそこ多いと思います。 そこで、この記事では HTTP リクエストスマグリングの基礎から Black Hat USA
Let’s Write a Tree-Sitter Major Mode Creating a standard programming major mode presents significant challenges, with the intricate tasks of establishing proper indentation and font highlighting being among the two hardest things to get right. It's painstaking work, and it'll quickly descend into a brawl between the font lock engine and your desire for correctness. Tree-sitter makes writing many m
Understanding the core class design and usage via its evolution Years ago, my studies into the Ruby Evolution started with the persuasion that mastering the programming language to express one’s intentions clearly and efficiently may grow significantly by understanding how it evolved and what intentions were put behind its various elements. Moving back through the history of a change of some eleme
Reading the excellent article by JeanHeyd Meneide on how broken string encoding in C/C++ is made me realise that Unicode is a topic that is often overlooked by a large number of developers. In my experience, there’s a lot of confusion and wrong expectations on what Unicode is, and what best practices to follow when dealing with strings that may contain characters outside of the ASCII range. This a
Try Mastering Emacs for free! Are you struggling with the basics? Have you mastered movement and editing yet? When you have read Mastering Emacs you will understand Emacs. It’s that time again: there’s a new major version of Emacs and, with it, a treasure trove of new features and changes. Notable features include the formal inclusion of native compilation, a technique that will greatly speed up y
Type Parameters Proposal
Ian Lance Taylor Robert Griesemer August 20, 2021 StatusThis is the design for adding generic programming using type parameters to the Go language. This design has been proposed and accepted as a future language change. We currently expect that this change will be available in the Go 1.18 release in early 2022. AbstractWe suggest extending the Go language to add optional type parameters to type an
I stumbled across Exercism last year and was immediately charmed. It's a website devoted to teaching programming languages. It's got a great UI, offers free mentoring (by a human!), and is entirely open source. Last January, they announced a new program called 12in23, where they challenged participants to try 12 new programming languages in 2023. Each month would have a theme (such as "Analytical
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
とほほのHaskell入門 - とほほのWWW入門
プロと読み解く Ruby 3.1 NEWS - クックパッド開発者ブログ
プロと読み解くRuby 3.4 NEWS - STORES Product Blog
The Prompt Engineering Playbook for Programmers
research!rsc: Coroutines for Go
Python 3.10から導入されたBetter error messagesの深掘り | gihyo.jp
Announcing TypeScript 4.8 - TypeScript
Structural pattern matching in Python 3.10
RFC 9562: Universally Unique IDentifiers (UUIDs)
Xilem: an architecture for UI in Rust
How terminal works. Part 1: Xterm, user input
Kalyn: a self-hosting compiler for x86-64
Announcing TypeScript 4.8 Beta - TypeScript
0.8.0 Release Notes ⚡ The Zig Programming Language
Advent of Code on the Nintendo DS
Lean for JavaScript Developers — overreacted
So You Want To Remove The GVL?
March 2022 (version 1.66)
Announcing TypeScript 4.8 RC - TypeScript
0.10.0 Release Notes ⚡ The Zig Programming Language
Andrej Karpathy — AGI is still a decade away
Software Engineering - The Soft Parts
Rust 1.53を早めに深掘り - OPTiM TECH BLOG
HTTP リクエストスマグリング入門から最新研究まで - FFRIエンジニアブログ
Let's Write a Tree-Sitter Major Mode
How it became like this? Ruby Range class
Unicode is harder than you think · mcilloni's blog
What's New in Emacs 28.1?
12 Languages in 12 Months