防衛省サイバーコンテスト 2025 writeup - st98 の日記帳 - コピー
2/2に12時間というちょうどよい競技時間で開催された。21時終了だったけれども、11時45分ぐらいに最速で全完して1位🎉 第1回以来4年ぶりの優勝だ。昨年大会の第4回ではヒントの閲覧数で優勝を逃してしまって悔しい思いをしたので、雪辱を果たすことができ嬉しい。開始直後からずっと1位を独走できており、450名以上のプレイヤーがいる中で圧勝だったのも嬉しい。 昨年度や一昨年度はバルクが作問を担当していたが、今回はAGESTが担当していた。これまでの問題と比較すると全体的に易化したように思うが、解くにあたって発想の大きな飛躍を必要とするいわゆる「エスパー要素」のある問題はごく一部を除いて存在しておらず*1、よかったと思う。また、昨年度・一昨年度に引き続きwriteupは公開可能というのもよかった。 戦略というほどの戦略は立てていなかったけれども、とりあえずWebを見た後は全カテゴリを上から見て
PerlからGoへのシステム移行のアシスト 〜Perl XSとUnix Domain Socketを活用〜 - Mirrativ Tech Blog
こんにちは ハタ です。 Mirrativ では 2020年頃から サーバサイドの技術をPerlからGoへのシステム移行 を行っており、2024年現在でもサグラダファミリアのように移行作業は継続しています PerlとGoという2つの環境を同時に運用していますが、 基本的には 新機能は Go で実装 し、 Perlでは積極的に新規実装を行わない というスタイルで進めていました しかし、既存の機能の一部に手を加えたいとなった場合、まだまだ Perl の実装に手を加えることが一定あり、Perl から Go の機能を呼び出したいというニーズが出てきました （配信やギフトといったビジネスの根幹を支えるレガシーな実装においては顕著） そこで PerlXS を利用することで Perl から Go を直接呼び出せるようにできないかと考え検証を進めることにしました Goの -buildmode=c-shar
Docker is deleting Open Source organisations - what you need to know
Coming up with a title that explains the full story here was difficult, so I'm going to try to explain quickly. Yesterday, Docker sent an email to any Docker Hub user who had created an "organisation", telling them their account will be deleted including all images, if they do not upgrade to a paid team plan. The email contained a link to a tersely written PDF (since, silently edited) which was mi
Building a highly-available web service without a database
If you’ve ever built a web service or a web app, you know the drill: pick a database, pick a web service framework (and in today’s day and age, pick a front-end framework, but let’s not get into that). This has been the case for several decades now, and people don’t stop to question if this is still the best way to build a web app. Many things have changed in the last decade: Disk is a lot faster
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
> BTC: bc1qs0sq7agz5j30qnqz9m60xj4tt8th6aazgw7kxr ETH: 0x1D834755b5e889703930AC9b784CB625B3cd833E USDT(Tron): TPrCq8LxGykQ4as3o1oB8V7x1w2YPU2o5n Ton: UQAtBuFWI3H_LpHfEToil4iYemtfmyzlaJpahM3tFSoxomYQ Doge: D7GMQdKhKC9ymbT9PtcetSFTQjyPRRfkwTdismiss OOP: the worst thing that happened to programming [2/24/2025] In this article, we will try to understand why OOP is the worst thing that happened to prog
PyTorch and TensorFlow are far and away the two most popular Deep Learning frameworks today. The debate over which framework is superior is a longstanding point of contentious debate, with each camp having its share of fervent supporters. Both PyTorch and TensorFlow have developed so quickly over their relatively short lifetimes that the debate landscape is ever-evolving. Outdated or incomplete in
Learn how Replit trains Large Language Models (LLMs) using Databricks, Hugging Face, and MosaicML IntroductionLarge Language Models, like OpenAI's GPT-4 or Google's PaLM, have taken the world of artificial intelligence by storm. Yet most companies don't currently have the ability to train these models, and are completely reliant on only a handful of large tech firms as providers of the technology.
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
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
缶つぶし機とソフトウェア移行技術 - Refactoring to Rust の読書感想文 - じゃあ、おうちで学べる
はじめに ——あるいは、「知っている」と「理解している」の間 Rustのことは、知っていた。学習もしていた。実務でも使っていた。 でも、それは知っているつもりだった。 知ってるつもり 無知の科学 (ハヤカワ文庫NF) 作者:スティーブン スローマン,フィリップ ファーンバック早川書房Amazon 日々Rustで開発し、BoxとRcとArcを使い分け、tokio::spawnでタスクを生成し、?演算子を当たり前のように書いている。FFI？PyO3使えばいいでしょ。WebAssembly？wasm-bindgenがあるじゃない。技術的には、確かに「使える」レベルにはあった。 でも、心のどこかで感じていた違和感があった。 オートバイのエンジンを分解できる人と、エンジンが動く原理を理解している人は違う。コードが動くことと、なぜそう書くべきかを理解することも違う。私は前者だった。メカニックではあった
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
Node.js
Notable changes built-in .env file support Starting from Node.js v20.6.0, Node.js supports .env files for configuring environment variables. Your configuration file should follow the INI file format, with each line containing a key-value pair for an environment variable. To initialize your Node.js application with predefined configurations, use the following CLI command: node --env-file=config.env
Update 1.69.1: The update addresses these issues. Update 1.69.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2022 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: 3-way merge editor - Resolve merge conflicts wit
Update 1.99.1: The update addresses these security issues. Update 1.99.2: The update addresses these issues. Update 1.99.3: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the March 2025 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highligh
Agents
Intelligent agents are considered by many to be the ultimate goal of AI. The classic book by Stuart Russell and Peter Norvig, Artificial Intelligence: A Modern Approach (Prentice Hall, 1995), defines the field of AI research as “the study and design of rational agents.” The unprecedented capabilities of foundation models have opened the door to agentic applications that were previously unimaginabl
Piccolo - A Stackless Lua Interpreter 2024-05-01 History of piccolo A "Stackless" Interpreter Design Benefits of Stackless Cancellation Pre-emptive Concurrency Fuel, Pacing, and Custom Scheduling "Symmetric" Coroutines and coroutine.yieldto The "Big Lie" Rust Coroutines, Lua Coroutines, and Snarfing Zooming Out piccolo is an interpreter for the Lua language written in pure, mostly safe Rust with a
January 10, 2025 This article was contributed by Murukesh Mohanan The death of Bram Moolenaar, Vim founder and benevolent dictator for life (BDFL), in 2023 sent a shock through the community, and raised concern about the future of the project. At VimConf 2024 in November, current Vim maintainer Christian Brabandt delivered a keynote on "the new Vim project" that detailed how the community has reor
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,
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
The history and future roadmap of the AWS CloudFormation Registry | Amazon Web Services
AWS DevOps & Developer Productivity Blog The history and future roadmap of the AWS CloudFormation Registry AWS CloudFormation is an Infrastructure as Code (IaC) service that allows you to model your cloud resources in template files that can be authored or generated in a variety of languages. You can manage stacks that deploy those resources via the AWS Management Console, the AWS Command Line Int
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
とほほのAWK入門 - とほほのWWW入門
AWKとは Hello world 簡単な利用例 実行方法 レコードとフィールド 基本文法 パターン アクション コメント 演算子 配列 多次元配列 配列の配列 入出力 print文 printf文 リダイレクト getline文 制御構文 if文 while文 do-while文 for文 switch文 break文 continue文 next文 nextfile文 exit文 関数 正規表現 インクルード(@include) ライブラリロード(@load) ネームスペース(@namespace) コマンドラインオプション ビルトイン変数 ビルトイン関数 ライブラリ関数 環境変数 ネットワークアクセス リンク AWKとは 「オーク」と呼びます。 開発者の Aho(エイホ)さん、Weinberger(ワインバーガー)さん、Kernighan(カーニハン)さんの頭文字から名前付けされまし
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
Update 1.80.1: The update addresses these issues. Update 1.80.2: The update addresses this security issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Accessibility improvements - Accessible V
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
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.54.1: The update addresses an issue with an extension dependency. Update 1.54.2: The update addresses these issues. Update 1.54.3: The update addresses this issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the February 2021 release of Vi
Patterns for Building LLM-based Systems & Products [ llm engineering production 🔥 ] · 66 min read Discussions on HackerNews, Twitter, and LinkedIn “There is a large class of problems that are easy to imagine and build demos for, but extremely hard to make products out of. For example, self-driving: It’s easy to demo a car self-driving around a block, but making it into a product takes a decade.”
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.70.1: The update addresses these issues. Update 1.70.2: The update addresses these issues. Update 1.70.3: This update is only available for Windows 7 users and is the last release supporting Windows 7. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welc
A Walk with LuaJIT
The following is a chronicle of implementing a general purpose zero-instrumentation BPF based profiler for LuaJIT. Some assumptions are made about what this entails and it may be helpful to read some of our other work in this area. One major change from prior efforts is that instead of working with the original Parca unwinder we are now working with the OpenTelemetry eBPF profiler. If you missed t
Since I was unable to travel for a couple of years during the pandemic, I decided to take my new-found time and really lean into Rust. After writing over 100k lines of Rust code, I think I am starting to get a feel for the language and like every cranky engineer I have developed opinions and because this is the Internet I’m going to share them. The reason I learned Rust was to flesh out parts of t
The joy of building a ray tracer, for fun, in Rust. // flurries of latent creativity
TLDR? You can find the code and a bunch of examples on GitHub at dps/rust-raytracer. Over the holiday break, I decided to learn Rust. Rust is a modern systems programming language which has a really interesting type system. The type system can catch broad classes of common programming mistakes - e.g. ensuring memory is accessed safely - at compile time while generating tight, performant machine co
How to improve Python packaging, or why fourteen tools are at least tw
There is an area of Python that many developers have problems with. This is an area that has seen many different solutions pop up over the years, with many different opinions, wars, and attempts to solve it. Many have complained about the packaging ecosystem and tools making their lives harder. Many beginners are confused about virtual environments. But does it have to be this way? Are the current
Delimiter-first code
Summary I argue for wider usage of delimiter-first in the code three friends [tic, tac, toe] becomes three friends ・tic ・tac ・toe. A new top-level syntax for programming languages is proposed to show advantages of this method. New syntax is arguably as simple, but more consistent, better preserves visual structure and solves some issues in code formatting. Related: comma-first formatting A well-kn
はじめての自然言語処理 Fusion-In-Decoder でクイズに答えるモデルを作る | オブジェクトの広場
今回は Fusion-In-Decoder を使ってクイズに答えるモデルを作ります。以前から Wikipedia 等の外部情報を参照できるテキスト生成モデルを試してみたいと思っていました。Fusion-In-Decoder の発表は 2020 年なので少し前のモデルですが、T5 ベースで手軽に試せるサイズ感ですので、日本語で試してみましょう。 1. はじめに 今回紹介する Fusion-In-Decoder（以下、FiD ）1 は Meta AI (当時は Facebook AI Research) が発表した Open Domain question Answering タスクを解くテキスト生成モデルです。 じつは、以前から外部情報を参照できるテキスト生成モデルを試してみたくて2、 Google の RETRO3 の論文を読んでたんです。 なのですが、外部情報のサイズ感が 1000 B
Bringing the power of AI to Windows 11 – unlocking a new era of productivity for customers and developers with Windows Copilot and Dev Home
Bringing the power of AI to Windows 11 – unlocking a new era of productivity for customers and developers with Windows Copilot and Dev Home The team and I are pumped to be back at Build with the developer community this year. Over the last year, Windows has continued to see incredible growth fueled by Windows 11 adoption. In fact, one of the most exciting areas driving that growth for Windows has
Update 1.82.1: The update addresses this security issue. Update 1.82.2: The update addresses these issues. Update 1.82.3: The update addresses this security issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the August 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key hi
The many, many, many JavaScript runtimes of the last decade
This last decade has seen an inundation of new JavaScript runtimes (and engines in equal measure), enabling us to run JavaScript in all manner of contexts with precise fitness for task. Through these, we've seen the language spread to the Cloud, the edge, Smart TVs, mobile devices, and even microcontrollers. In this article, we'll explore what's driving this diversity, and why no one runtime or en
Update 1.78.1: The update addresses this security issue. Update 1.78.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the April 2023 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Accessibility improvements - Better scre
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The Prompt Engineering Playbook for Programmers
OOP: the worst thing that happened to programming
PyTorch vs TensorFlow in 2023
Replit — How to train your own Large Language Models
Python 3.10から導入されたBetter error messagesの深掘り | gihyo.jp
Changing std::sort at Google’s Scale and Beyond
June 2022 (version 1.69)
March 2025 (version 1.99)
kyju.org - Piccolo - A Stackless Lua Interpreter
The state of Vim [LWN.net]
What a good debugger can do 🔮
April 2022 (version 1.67)
Font with Built-In Syntax Highlighting
June 2023 (version 1.80)
Kalyn: a self-hosting compiler for x86-64
February 2021 (version 1.54)
Patterns for Building LLM-based Systems & Products
July 2022 (version 1.70)
Rust: A Critical Retrospective « bunnie's blog
August 2023 (version 1.82)
April 2023 (version 1.78)