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  • 「Postgres で試した?」と聞き返せるようになるまでもしくはなぜ私は雰囲気で技術を語るのか? — Just use Postgres 読書感想文 - じゃあ、おうちで学べる

    はじめに 「Just use Postgres」という言葉を初めて聞いたのは、いつだったか覚えていません。Twitter か Hacker News か、あるいは社内の Slack か。どこで聞いたにせよ、私の反応は決まっていました。「また極端なことを言う人がいる」と。 「それ、〇〇でもできますよ」——この手のフレーズはもう100回は聞いてきました。そして大抵の場合、その〇〇は専用ツールに置き換えられていきます。技術が専門分化していくのは自然な流れです。 全文検索なら Elasticsearch。時系列データなら InfluxDB。メッセージキューなら RabbitMQ。それぞれの分野に専門家がいて、専用のソリューションがあって、ベストプラクティスがあります。「とりあえず Postgres で」なんて、それは思考停止ではないか、と。でも、心のどこかで気になっていたんです。 www.mann

      「Postgres で試した?」と聞き返せるようになるまでもしくはなぜ私は雰囲気で技術を語るのか? — Just use Postgres 読書感想文 - じゃあ、おうちで学べる
    • MySQL のインデクスが利用されないクエリ等を自動検出する ExplainPolice の運用について

      LINE株式会社は、2023年10月1日にLINEヤフー株式会社になりました。LINEヤフー株式会社の新しいブログはこちらです。 LINEヤフー Tech Blog LINE 株式会社 B2B Platform 開発担当フェローの Matsuno です。 LINE の Business Platform ではメインのデータベースとして MySQL を利用しています。MySQL は非常に高速に動く OSS の RDBMS なので、とても便利に利用させていただいております。 MySQL はとても高速なのですが、うっかり index を使わないクエリを発行した場合に実行がとても遅くなってしまうことがあります。LINE の Business Platform はとても多くのお客様が利用されるので、B2B としては異例なほどトラフィックが多く、少し遅いクエリが発生した結果としてサイト全体がダウンして

        MySQL のインデクスが利用されないクエリ等を自動検出する ExplainPolice の運用について
      • 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

          Rewriting the Ruby parser
        • Python 3.13 gets a JIT

          Happy New Year everyone! In late December 2023 (Christmas Day to be precise), CPython core developer Brandt Bucher submitted a little pull-request to the Python 3.13 branch adding a JIT compiler. This change, once accepted would be one of the biggest changes to the CPython Interpreter since the Specializing Adaptive Interpreter added in Python 3.11 (which was also from Brandt along with Mark Shann

            Python 3.13 gets a JIT
          • 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,

              Weird Lexical Syntax
            • 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

              • 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

                  Announcing Dart 3
                • 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

                    Parsing SQL - Strumenta
                  • Implementing Logic Programming

                    Most of my readers are probably familiar with procedural programming, object-oriented programming (OOP), and functional programming (FP). The majority of top programming languages on all of the language popularity charts (like TIOBE) support all three to some extent. Even if a programmer avoided one or more of those three paradigms like the plague, they’re likely at least aware of them and what th

                      Implementing Logic Programming
                    • Kalyn: a self-hosting compiler for x86-64

                      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

                      • The OpenSSL punycode vulnerability (CVE-2022-3602): Overview, detection, exploitation, and remediation | Datadog Security Labs

                        emerging threats and vulnerabilities The OpenSSL punycode vulnerability (CVE-2022-3602): Overview, detection, exploitation, and remediation November 1, 2022 emerging vulnerability On November 1, 2022, the OpenSSL Project released a security advisory detailing a high-severity vulnerability in the OpenSSL library. Deployments of OpenSSL from 3.0.0 to 3.0.6 (included) are vulnerable and are fixed in

                          The OpenSSL punycode vulnerability (CVE-2022-3602): Overview, detection, exploitation, and remediation | Datadog Security Labs
                        • The life and times of an Abstract Syntax Tree

                          You’ve reached computer programming nirvana. Your journey has led you down many paths, including believing that God wrote the universe in LISP, but now the truth is clear in your mind: every problem can be solved by writing one more compiler. It’s true. Even our soon-to-be artificially intelligent overlords are nothing but compilers, just as the legends foretold. That smart contract you’ve been wr

                            The life and times of an Abstract Syntax Tree
                          • Zig in 30 minutes

                            test.md A half-hour to learn Zig This is inspired by https://fasterthanli.me/blog/2020/a-half-hour-to-learn-rust/ Basics the command zig run my_code.zig will compile and immediately run your Zig program. Each of these cells contains a zig program that you can try to run (some of them contain compile-time errors that you can comment out to play with) You'll want to declare a main() function to get

                              Zig in 30 minutes
                            • The Go Programming Language and Environment – Communications of the ACM

                              Go is a programming language created at Google in late 2007 and released as open source in November 2009. Since then, it has operated as a public project, with contributions from thousands of individuals and dozens of companies. Go has become a popular language for building cloud infrastructure: Docker, a Linux container manager, and Kubernetes, a container deployment system, are core cloud techno

                              • In Praise of dhh

                                In Praise of dhh November 8, 2025 | #tech #politics A reflection on Ruby’s past, present, and future. This is a long essay. I strongly recommend you read it from the beginning, but to help navigate it I have created this table of contents. Prologue The Past How I Learned To Love Ruby A Breath Of Fresh Air A Shared Worldview The Present Tragedy Strikes Recent Conflict In The Community Strength and

                                • Cloudflare functions with Scala.js

                                  Indoor VivantsAnton Sviridov. I love reinventing the wheel and I usually use Scala for that. TL;DR We are deploying an app to Cloudflare using Scala.js We are using ScalablyTyped We are using Scala 3 heavily Code on Github Deployed app Cloudflare API bindings Welcome to the "Put ma Scala on yo cloud" series I want to say that I'm kicking off a blog series, but even I don't believe that. If I did,

                                  • State of the Common Lisp ecosystem, 2020 🎉 - Lisp journey

                                    NEW: 9 videos (86min) about CLOS on my Common Lisp course. Out of 7h+ of content. Rated 4.7/5. Learn more and stay tuned. 🎥 I also have cool Lisp showcases on Youtube . The last ones: how to build a web app in Common Lisp, part 1 and 2. This is a description of the Common Lisp ecosystem, as of January, 2021, from the perspective of a user and contributor. The purpose of this article is both to gi

                                    • JEP 425: Virtual Threads (Preview)

                                      Summary Introduce virtual threads to the Java Platform. Virtual threads are lightweight threads that dramatically reduce the effort of writing, maintaining, and observing high-throughput concurrent applications. This is a preview API. Goals Enable server applications written in the simple thread-per-request style to scale with near-optimal hardware utilization. Enable existing code that uses the j

                                      • A guide to React design patterns - LogRocket Blog

                                        Editor’s note: This guide to React design patterns was last reviewed for accuracy by Isaac Okoro on 12 April 2024. The article was also updated to add four more design patterns, covering prop combination, controlled components, forwardRefs, and conditional rendering. It was previously updated to include information about the render props pattern and state reducer pattern. Check out this article fo

                                          A guide to React design patterns - LogRocket Blog
                                        • Darker Corners of Go – Rytis Biel

                                          Note: this article is available as an ebook and as a printed book for easier reading Introduction What is this? When I was first learning Go, I already knew several other programming languages. But after reading an introductory book and the language specification I felt like I really didn’t know enough about Go to use it for real world work. I felt I’d probably need to fall into many traps before

                                            Darker Corners of Go – Rytis Biel
                                          • Common I/O Tasks in Modern Java - Dev.java

                                            Introduction This article focuses on tasks that application programmers are likely to encounter, particularly in web applications, such as: Reading and writing text files Reading text, images, JSON from the web Visiting files in a directory Reading a ZIP file Creating a temporary file or directory The Java API supports many other tasks, which are explained in detail in the Java I/O API tutorial. T

                                              Common I/O Tasks in Modern Java - Dev.java
                                            • 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

                                              • V Language Review (2022)

                                                V is a programming language promising to be “Simple, fast, safe, compiled. For developing maintainable software.” V has a controversial past but what is the state of V in 2022? Is V worth checking out? In this post, we’ll take a look at V as it exists in May 2022. TLDR Read the summary Rules of engagement I’ll be using the current version of V built from git which is 50ab2cfd1ae02d4f4280f38c60b8db

                                                • 使い慣れたプログラミング言語でAWSのインフラ管理をする ~AWS CDKのススメ~ - ABEJA Tech Blog

                                                  1. AWS CDKとは 2. AWS CDKを触ってみる 2.1 環境構築 Volta Node.js CDK 2.2. とりあえずLambdaを作成するところまでやってみる 2.2.1. プロジェクト作成 2.2.2. デプロイ用のLambda関数を書く 2.2.3. CDKのStackにLambda関数を記載する 2.2.4. デプロイしてみる 2.2.5. お片付け 2.3. CRUDっぽいAPIをAPI Gatewayで公開してみる 2.3.1. Lambda関数を用意する 2.3.2. CDKを用意する 2.3.3. デプロイして動かしてみる 2.3.4. お片付け 2.3.5. 詰まったところ 3. 感想 We Are Hiring! ABEJAでプロダクト開発をしている平原です。ABEJAアドベントカレンダー2023の6日目の記事です。皆さんはAWSでIaCを利用する時には

                                                    使い慣れたプログラミング言語でAWSのインフラ管理をする ~AWS CDKのススメ~ - ABEJA Tech Blog
                                                  • HuggingFaceFW/fineweb · Datasets at Hugging Face

                                                    "},"dump":{"kind":"string","value":"CC-MAIN-2013-20"},"url":{"kind":"string","value":"http://%20jwashington@ap.org/Content/Press-Release/2012/How-AP-reported-in-all-formats-from-tornado-stricken-regions"},"date":{"kind":"string","value":"2013-05-18T05:48:54Z"},"file_path":{"kind":"string","value":"s3://commoncrawl/crawl-data/CC-MAIN-2013-20/segments/1368696381249/warc/CC-MAIN-20130516092621-00000-

                                                      HuggingFaceFW/fineweb · Datasets at Hugging Face
                                                    • Sayonara, C++, and hello to Rust!

                                                      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

                                                      • research!rsc: Programming Language Memory Models (Memory Models, Part 2)

                                                        Programming language memory models answer the question of what behaviors parallel programs can rely on to share memory between their threads. For example, consider this program in a C-like language, where both x and done start out zeroed. // Thread 1 // Thread 2 x = 1; while(done == 0) { /* loop */ } done = 1; print(x); The program attempts to send a message in x from thread 1 to thread 2, using d

                                                        • After months of coding with LLMs, I'm going back to using my brain • albertofortin.com

                                                          After months of coding with LLMs, I'm going back to using my brain TLDR: LLMs are okay at coding, but at scale they build jumbled messes. I’ve scaled back my use of AI when coding and gone back to using my brain and pen and paper. A few months ago I needed to build a new infrastructure for my SaaS, as the current PHP+MySQL combo was not fit for purpose anymore. I was excited about the opportunity

                                                          • Using a Framework will harm the maintenance of your software

                                                            In this article I’m putting together my quotes, thoughts and notes on the idea that Frameworks harm the maintainability of the software you build in that framework. I’m proposing that Frameworks: are harming maintainability, but not deliberate. have different goals than you or your team. make trade-offs that harm maintainability of the projects built in them. are designed to take your project host

                                                            • What's New in Emacs 28.1?

                                                              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

                                                              • Vim9 script for Python Developers · GitHub

                                                                vim9script4pythondevelopers.md Vim9 script for Python Developers Vim9 script�Vim script��������������������������������������������������系��� def������義����������Vim script��vim9script�����使����������(vim9script���

                                                                  Vim9 script for Python Developers · GitHub
                                                                • 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

                                                                  • Faster virtual machines: Speeding up programming language execution - Mort's Ramblings

                                                                    Date: 2023-01-15 Git: https://gitlab.com/mort96/blog/blob/published/content/00000-home/00015-fast-interpreters.md In this post, I hope to explore how interpreters are often implemented, what a "virtual machine" means in this context, and how to make them faster. Note: This post will contain a lot of C source code. Most of it is fairly simple C which should be easy to follow, but some familiarity w

                                                                    • https://cheats.rs/rust_cheat_sheet.pdf

                                                                      Rust Language Cheat Sheet 26. August 2021 Contains clickable links to The Book , Rust by Example , Std Docs , Nomicon , Reference . Data Structures Data types and memory locations defined via keywords. Example Explanation struct S {} Define a struct with named fields. struct S { x: T } Define struct with named field x of type T. struct S ​(T); Define "tupled" struct with numbered field .0 of type

                                                                      • Gregory Szorc's Digital Home | Rust is for Professionals

                                                                        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

                                                                        • CTF Cloud 問題の攻撃手法まとめ(2022年版) - blog of morioka12

                                                                          1. はじめに こんにちは、morioka12 です。 本稿では、CTFtime のイベントに記載されている2022年に開催された CTF のイベントで、Cloud に関する問題をピックアップして攻撃手法やセキュリティ視点での特徴について紹介します。 また、昨年の2021年版は以下で紹介していますので、良ければこちらもご覧ください。 昨年のブログでは、各サービスにセキュリティ的な視点で紹介しましたが、今回は説明が重複するため、各問題に焦点を当てて大まかに紹介します。 scgajge12.hatenablog.com 1. はじめに 1.1 調査対象 2. Cloud 環境におけるセキュリティ視点 2.1 脆弱性攻撃によるクレデンシャルの取得 Amazon EC2 AWS Lambda 2.2 設定不備やハードコーディングによるクレデンシャルの取得 Amazon S3 Amazon RDS

                                                                            CTF Cloud 問題の攻撃手法まとめ(2022年版) - blog of morioka12
                                                                          • Cloud9 で SAM を利用し AWS サービス毎の請求額を毎日 Slack に通知する | DevelopersIO

                                                                            Cloud9 を利用して AWS のサービス毎の料金を毎日 Slack に通知する仕組みを作成しました。 コーヒーが好きな emi です。 AWSサービス毎の請求額を毎日 Slack に通知するため、以下のブログ AWSサービス毎の請求額を毎日Slackに通知してみた を見ながら設定しようとしたのですが、手元の Windows 11 端末に AWS CLI、AWS SAM CLI、Python などの開発環境を整えるのが面倒…!!と思いました。 そこで、AWS Cloud9 を使って手軽に一時的な開発環境を構築し、AWS Serverless Application Model (SAM) でサーバレス通知システムを構築しました。 AWS Serverless Application Model (SAM) とは AWS SAM は、サーバーレスアプリケーション構築用のオープンソースフレー

                                                                              Cloud9 で SAM を利用し AWS サービス毎の請求額を毎日 Slack に通知する | DevelopersIO
                                                                            • Rust in Perspective

                                                                              We are discussing and working toward adding the language Rust as a second implementation language in the Linux kernel. A year ago Jake Edge made an excellent summary of the discussions so far on Rust for the Linux kernel and we (or rather Miguel and Wedson) have made further progress since then. For the record I think this is overall a good idea and worth a try. I wanted to add some background tha

                                                                                Rust in Perspective
                                                                              • How to maintain engineering velocity as you scale | Y Combinator

                                                                                Engineering is typically the function that grows fastest at a scaling startup. It requires a lot of attention to make sure the pace of execution does not slow and cultural issues do not emerge as you scale. We’ve learned a lot about pace of execution in the past five years at Faire. When we launched in 2017, we were a team of five engineers. From the beginning, we built a simple but solid foundati

                                                                                  How to maintain engineering velocity as you scale | Y Combinator
                                                                                • cuneicode, and the Future of Text in C

                                                                                  Following up from the last post, there is a lot more we need to cover. This was intended to be the post where we talk exclusively about benchmarks and numbers. But, I have unfortunately been perfectly taunted and status-locked, like a monster whose “aggro” was pulled by a tank. The reason, of course, is due to a few folks taking issue with my outright dismissal of the C and C++ APIs (and not showi

                                                                                    cuneicode, and the Future of Text in C