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
モチベーション なぜRustを選んだか？ 私はQEMUは「アーキテクチャエミュレーション界のLLVM」だと思っている QEMUが高速な理由：TCG Binary Translation ゲスト命令(RISC-V) → TCG → ホスト命令(x86)の処理をRustで作ろう RISC-Vの命令をフェッチしてデコードする RISC-Vの命令をTCGに変換する TCGをx86に変換する 実装結果 Binary Translation実行を高速化するための様々なテクニック BasicBlock分まで複数命令をまとめて変換 TCG Block Chainingの実装 評価結果 TB Lookup and Jumpの実装 評価結果 まだ完成していないところ 一部の最適化はまだ未実装となっている ゲストアーキテクチャがx86のみとなっている。TCGによる複数プラットフォーム対応として、まずは環境のそろ
【知財・個人情報】ChatGPTをビジネスに利用する際の注意点 ['23/4/11] - Qiita
OpenAI利用規約 まず、OpenAIが提供するサービス（ChatGPTおよびOpenAI API）の利用規約を確認します。 ３. Content (a) Your Content. You may provide input to the Services (“Input”), and receive output generated and returned by the Services based on the Input (“Output”). Input and Output are collectively “Content.” As between the parties and to the extent permitted by applicable law, you own all Input. Subject to your compliance with the
![【知財・個人情報】ChatGPTをビジネスに利用する際の注意点 ['23/4/11] - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/dec6568345f0315e003d44ba6c2ecf9aab98146e/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-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%26mark-x%3D142%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTcxNiZ0eHQ9JTQwZ3JvdW5kMHN0YXRlJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9MzImdHh0LWFsaWduPWxlZnQlMkN0b3Amcz0xNmYzYzMxYjc0NzRmZGQ3YTAwMDIxODNiN2Y3ZWI5Nw%26blend-x%3D142%26blend-y%3D491%26blend-mode%3Dnormal%26s%3D92915abc11a24e499be9e653ab495967)
Rubyでできる！RISC-Vシミュレータの作りかた 〜 From 4649 To HELLO WORLD 〜 - ESM アジャイル事業部 開発者ブログ
HELLO WORLD〜 はじめに こんにちは、永和システムマネジメントの自作CPUおじさん、はたけやまたかし( @htkymtks )です。 今回はRubyを使った小さなRISC-Vシミュレータの作り方をご紹介します（以前もシミュレータの記事を書いたのですが、シミュレータに大幅に手を入れたので、それに対応したHDリマスター版です） リポジトリ （今回ご紹介するシミュレータのリポジトリはこちら） thata / rv32sim https://github.com/thata/rv32sim RISC-Vとは RISC-VはCPUの命令セットアーキテクチャ(ISA)のひとつで、使用料のかからないオープンソースライセンスで提供されていることや、命令セットの美しさから最近注目を集めています。 仕様 RISC-Vの仕様にはワード幅(32ビット、64ビット)や浮動小数点数サポートの有無など、いくつ
Speculation in JavaScriptCore
This post is all about speculative compilation, or just speculation for short, in the context of the JavaScriptCore virtual machine. Speculative compilation is ideal for making dynamic languages, or any language with enough dynamic features, run faster. In this post, we will look at speculation for JavaScript. Historically, this technique or closely related variants has been applied successfully t
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
背景 & Disclaimer 自分自身はこれまでBigQuery Scriptingをほぼ使っていませんでした BigQuery自体は3年くらいの利用歴 SQL単発で済ませるのが苦しそうな場合は、Pythonなどのプログラミング言語 + ワークフローエンジンの組み合わせで戦っており、自分としては特に困っていなかった 社内で他の方が使うケースをぼちぼち見ることがある 自分は困っていなくても、社内のBigQueryユーザーでBigQuery Scriptingを使っていて困っている人がそれなりにいる 著者はそれなりのBigQueryユーザーがいる企業のデータ基盤の人間です さすがに「使ったことないので、分からないですねー」で済ませるわけにはいかなくなってきた そもそもどんなユースケースで便利なのかすらも分かっていない状態なので、便利そうに思える場合をまとめてみることにしました というわけで、
In our team at Rakuten, we have been using Elm1 in production for almost two years now. This post is about our story, the lessons we learned, and our likes and dislikes. This post is quite long so if you prefer to see an overview, feel free to jump to the index. Everything started in the Berlin branch of Rakuten during the summer of 2017. We were maintaining a medium-size single-page application w
Security Incident December 2022 Update - LastPass - The LastPass Blog
Please refer to the latest article for updated information. Update as of Thursday, December 22, 2022 To Our LastPass Community, We recently notified you that an unauthorized party gained access to a third-party cloud-based storage service, which LastPass uses to store archived backups of our production data. In keeping with our commitment to transparency, we want to provide you with an update rega
EDIT: A previous version of this post recommended publishConfig, operating under the mistaken belief that it could be used to override "exports" during npm publish. As it turns out, npm only uses "publishConfig" to override certain .npmrc fields like registry and tag, whereas pnpm has expanded its use to override package metadata like "main", "types", and "exports". There are a number of reasons y
Bash Pitfalls This page is a compilation of common mistakes made by bash users. Each example is flawed in some way. 1. for f in $(ls *.mp3) One of the most common mistakes BASH programmers make is to write a loop like this: for f in $(ls *.mp3); do # Wrong! some command $f # Wrong! done for f in $(ls) # Wrong! for f in `ls` # Wrong! for f in $(find . -type f) # Wrong! for f in `find . -type f` # W
Interesting Programming Languages an opinionated collection of programming languages. Created: Feb 19, 2020 by Pradeep Gowda Updated: May 17, 2024 Tagged: programming-language An opinionated collection of programming languages. This is a list of what I consider interesting. Requests to add to this list are welcome, but there is no guarantee I’ll include them. As you can see many mainstream program
On this coming Thursday, November 7, async-await syntax hits stable Rust, as part of the 1.39.0 release. This work has been a long time in development -- the key ideas for zero-cost futures, for example, were first proposed by Aaron Turon and Alex Crichton in 2016! -- and we are very proud of the end result. We believe that Async I/O is going to be an increasingly important part of Rust's story. W
Post-Incident Review on the Atlassian April 2022 outage - Atlassian Engineering
This PIR is available in the following languages:日本語 | 简体中文 | 繁體中文 | Deutsch | English | Español | Français | Italiano | 한국어 | Polski | Português | русский. Letter from our co-founders & co-CEOs We want to acknowledge the outage that disrupted service for customers earlier this month. We understand that our products are mission critical to your business, and we don't take that responsibility light
Elm at Rakuten
lucamug Posted on Jan 25, 2021 • Updated on Mar 4, 2023 • Originally published at engineering.rakuten.today In our team at Rakuten, we have been using Elm1 in production for almost two years now. This post is about our story, the lessons we learned, and our likes and dislikes. This post is quite long so if you prefer to see an overview, feel free to jump to the index. Everything started in the Ber
BigQuery MLでスロット使用量が急増しているプロジェクトやユーザーを異常検知する - yasuhisa's blog
背景 どうやって異常を検知するか BigQuery MLでの異常検知 検知できるモデルの種類 共通設定 データの前準備 モデルの学習 モデルを元にスロット使用量が異常に増加していないか予測する 所感 背景 BigQueryはオンデマンドとフラットレート(定額料金)がある オンデマンドはスキャン量がお金に直結するため、INFORMATION_SCHEMA.JOBS_BY_*などを使ってクエリ警察をしている方も多いはず INFORMATION_SCHEMAに代表されるデータ管理に役に立つ現場のノウハウを最近会社のTech Blogに書いたので、そちらも見てね 一方で、フラットレートに関しては定額使いたい放題のプランであるため、オンデマンドよりはクエリ警察をしていない場合もある 見れるなら見たいが、どうしても支出に直結するオンデマンドを優先して見てしまいがち。工数も限られている が、あまりに自由
Blogged Answers: A (Mostly) Complete Guide to React Rendering Behavior
Random musings on React, Redux, and more, by Redux maintainer Mark "acemarke" Erikson This is a post in the Blogged Answers series. Details on how React rendering behaves, and how use of Context and React-Redux affect rendering I've seen a lot of ongoing confusion over when, why, and how React will re-render components, and how use of Context and React-Redux will affect the timing and scope of tho
Send feedback Procedural language Stay organized with collections Save and categorize content based on your preferences. The GoogleSQL procedural language lets you execute multiple statements in one query as a multi-statement query. You can use a multi-statement query to: Run multiple statements in a sequence, with shared state. Automate management tasks such as creating or dropping tables. Implem
Modern source-control systems provide powerful tools that make it easy to create branches in source code. But eventually these branches have to be merged back together, and many teams spend an inordinate amount of time coping with their tangled thicket of branches. There are several patterns that can allow teams to use branching effectively, concentrating around integrating the work of multiple de
——————————————————————————————————————————————————— Redis(REmote DIrectory Server)Redisは例えば以下の特徴を持つLLOOGGを元としたインメモリの非リレーショナルのデータベースです。 String, List, Hash, Set, Sorted Setに代表される豊富なデータ型シングルスレッド処理イベント駆動処理 by aeライブラリ通常RESPプロトコルによるクライアント/サーバーモデルでリクエスト/レスポンスデータは条件を満たす場合にメモリ最適化されて保存。CPUとのトレードオフRAXを利用したメモリ利用量の最適化(Redis 4.0~)この記事では、入門から始まり、実装をより意識することで深く理解することを目標としています。 以下の説明中の(*)マークは、特にVanilla Redisでの話となり
Every so often I read an essay that I end up thinking about, and citing in conversation, over and over again. Here’s my index of all the ones of those I can remember! I’ll try to keep it up to date as I think of more. There's a lot in here! If you'd like, I can email you one essay per week, so you have more time to digest each one: Nelson Elhage, Computers can be understood. The attitude embodied
セキュリティ英単語帳
2022年6⽉ 独⽴⾏政法⼈ 情報処理推進機構 産業サイバーセキュリティセンター 第5期中核⼈材育成プログラム 「セキュリティエンジニアのための English Reading」プロジェクト 動詞 単語 意味 関連語 使用例 include ～を含む 【名】inclusion: 包含、含まれるもの 【形】inclusive: すべてを含んだ the email including a malicious macro 悪意のあるマクロを含むメール steal ～を盗む steal sensitive information 機微な情報を盗む exploit (脆弱性) を突いて攻撃する 【名】エクスプロイト (コード) 【名】exploitation: (脆弱性を突く) 攻撃 【形】exploitable: 悪用可能な actively exploited vulnerability よく攻
We’re happy to announce the initial public work on GraalWasm — the WebAssembly engine implemented in GraalVM. GraalWasm currently implements the WebAssembly MVP (Minimum Viable Product) specification, and can run WebAssembly programs in the binary format, generated with compiler backends such as Emscripten. Supporting WebAssembly expands the set of languages GraalVM can execute with a whole other
I always wanted to understand how a CPU works, how it transitions from one instruction to the next and makes a computer work. So after reading Ken Shirrif’s blog about a bug fix in the 8086 processor I thought: Well, let’s try to write one in a hardware description language. This post is a write up of my learning experiment. I’ll walk through my steps of creating an emulator, compiling and linking
【 デジスマチーム ブログリレー2日目】 エンジニアリングGの立花です。 デジスマ診療 というサービスのアプリ(Flutter)、バックエンド、フロントエンドの開発をしています、宜しくお願いします。 最近低レイヤーの技術に興味があり、趣味でRISC-Vの勉強をしています。 今回は実際に実行ファイルを動かすことが出来るRISC-VシミュレータをRustで実装していきます。 はじめに こちらの記事は、先日エムスリー社内LT会であるTechTalkで発表した内容で後日動画を公開予定です。 また、実装したシミュレータのソースコードは以下で閲覧できます。 github.com 目次 はじめに 目次 RISC-Vとは 今回の目標 開発環境 テスト内容の確認 クロスコンパイル環境の準備 テストの実行ファイルを作成 テストの内容を確認 シミュレータの実装 メモリを実装 プログラムカウンタを実装 メインルー
How I developed a faster Ruby interpreter | Red Hat Developer
As a rule, RTL code contains fewer instructions than stack-based instructions, and as result spends less time in interpreter instruction dispatch code. But RTL sometimes spends more time in operand decoding. More importantly, RTL code results in less memory traffic, because local variables and stack values are addressed directly by RTL instructions. Therefore, stack pushes and pops of local variab
Our latest perspectives on the coronavirus outbreak, the twin threats to lives and livelihoods, and how organizations can prepare for the next normal. COVID-19: Briefing note #100, April 13, 2022 As COVID-19 becomes endemic in much of the world, we turn our focus to sustainable and inclusive growth. On March 2, 2020, just over a week before a global pandemic was declared, we published COVID-19: Br
We Hacked Apple for 3 Months: Here’s What We Found | Sam Curry
Between the period of July 6th to October 6th myself, Brett Buerhaus, Ben Sadeghipour, Samuel Erb, and Tanner Barnes worked together and hacked on the Apple bug bounty program. Sam Curry (@samwcyo) Brett Buerhaus (@bbuerhaus) Ben Sadeghipour (@nahamsec) Samuel Erb (@erbbysam) Tanner Barnes (@_StaticFlow_) During our engagement, we found a variety of vulnerabilities in core portions of their infras
You’re seeing information for Japan . To see local features and services for another location, select a different city. Show more The App Size Problem Uber’s iOS mobile Apps for Rider, Driver, and Eats are large in size. The choice of Swift as our primary programming language, our fast-paced development environment and feature additions, layered software and its dependencies, and statically linked
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
Several weeks ago, the .NET Blog featured a post What is .NET, and why should you choose it?. It provided a high-level overview of the platform, summarizing various components and design decisions, and promising more in-depth posts on the covered areas. This post is the first such follow-up, deep-diving into the history leading to, the design decisions behind, and implementation details of async/a
Prerender pages in Chrome for instant page navigations | Web Platform | Chrome for Developers
The Chrome team has been working on options to bring back full prerendering of future pages that a user is likely to navigate to. A brief history of prerender In the past, Chrome supported the <link rel="prerender" href="/next-page"> resource hint, however it was not broadly supported beyond Chrome, and it wasn't a very expressive API. This legacy prerendering using the link rel=prerender hint was
Over the last year or so, I have found myself on a journey to deeply understand how to run Rails applications backed by SQLite performantly and resiliently. In that time, I have learned various lessons that I want to share with you all now. I want to walk through where the problems lie, why they exist, and how to resolve them. And to start, we have to start with the reality that… Unfortunately, ru
BigQueryに関する話を自由にしましょう - BigQueryでデータ基盤を作った - BigQueryと他サービスでデータ転送した - BigQuery関数でこんな計算をしている などなど みなさんこんにちは。年末ですね。年末やることといえば、振り返り、総集編ですよね。 BigQueryアドベントカレンダーができたのをみて、「そういえば2019年にやったBigQueryのリリースまとめ的なの、2020年やってないな・・・？」と思い立ち2020年のBigQueryアップデートをまとめました。リリースノート開いたらスクロールバーがすごく小さくなり心が折れかけましたが、なんとか気持ちを奮い立たせました。もしもこんな長い記事を最後までスクロールしてくれる方がいたら、感謝の意を表明しますので、Twitterで @yutah_3 まで教えていただけると、泣いて喜びます。 以下、カテゴリに分けてア
I joined Dropbox not long after graduating with a Master’s degree in computer science. Aside from an internship, this was my first big-league engineering job. My team had already begun designing a critical internal service that most of our software would use: It would handle asynchronous computing requests behind the scenes, powering everything from dragging a file into a Dropbox folder to schedul
In part 2 of the Cancellation and Exceptions in Coroutines series, we learnt the importance of cancelling work when it’s no longer needed. On Android, you can use the CoroutineScopes provided by Jetpack: viewModelScope or lifecycleScope that cancel any running work when their scope completes — that is when the Activity/Fragment/Lifecycle completes. If you’re creating your own CoroutineScope, make
dbt と Dataform を比較して Dataform を利用することにしました | MoT Lab (GO Inc. Engineering Blog)
タクシーアプリ「GO」、法人向けサービス「GO BUSINESS」、タクシーデリバリーアプリ「GO Dine」の分析基盤を開発運用している伊田です。今回、dbt と Dataform を比較して Dataform を利用することにしましたので、導入経緯および Dataform の初期構築を紹介します。 ※ 本記事の対象読者はELTツールを利用している方を対象にしています これは MoT Engineer Challenge Week 2022 Spring の記事です。 はじめに本記事では、まず、dbt および Dataform というツールについて簡単に説明させて頂き、次に現在データ分析チームが抱えている課題について取り上げます。その後、2つのツールについて検証した内容を紹介し、その結果、Dataform の導入に至った経緯を説明します。また、最後に Dataform の初期構築で工夫し
Google Cloud recommendations for Apache Log4j 2 vulnerability | Google Cloud Blog
Google Cloud recommendations for investigating and responding to the Apache “Log4j 2” vulnerability Editor's note: This post was updated on 1/14/21 at 1:12pm PST. In this post, we provide recommendations from the Google Cybersecurity Action Team and discuss Google Cloud and Chronicle solutions to help security teams to manage the risk of the Apache “Log4j 2” vulnerability (CVE-2021-44228 and CVE-2
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! The scp command, which uses the SSH protocol to copy files between machines, is deeply wired into the fingers of many Linux users and developers — doubly
Tiny but mighty: The Phi-3 small language models with big potential
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Command Line Interface Guidelines
フルスクラッチから作って理解するQEMU (Rust編) - FPGA開発日記
BigQuery Scriptingの便利な使い方をまとめてみた - yasuhisa's blog
Elm at Rakuten | Rakuten Engineering Blog
Live types in a TypeScript monorepo
BashPitfalls - Greg's Wiki
Interesting Programming Languages
Async-await on stable Rust! | Rust Blog
Procedural language | BigQuery | Google Cloud
Patterns for Managing Source Code Branches
Dive Deep Redis ~ 入門から実装の確認まで - hayashier Tech Blogs
Essays on programming I think about a lot
Announcing GraalWasm — a WebAssembly engine in GraalVM
How a CPU works: Bare metal C on my RISC-V toy CPU
RustでRISC-Vシミュレータを実装する - エムスリーテックブログ
COVID-19: Implications for business
How Uber Deals with Large iOS App Size
Kalyn: a self-hosting compiler for x86-64
How Async/Await Really Works in C# - .NET Blog
SQLite on Rails | Fractaled Mind
BigQueryの2020年アップデートを（だいたい）全部振り返る
How we designed Dropbox’s ATF - an async task framework
Coroutines & Patterns for work that shouldn’t be cancelled
Deprecating scp [LWN.net]