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
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
A few months ago, I set myself the challenge of writing a C compiler in 500 lines of Python1, after writing my SDF donut post. How hard could it be? The answer was, pretty hard, even when dropping quite a few features. But it was also pretty interesting, and the result is surprisingly functional and not too hard to understand! There's too much code for me to comprehensively cover in a single blog
With pen and paper, anyone can write a journal entry, draw a diagram, perform a calculation, or sketch a cartoon. Digital tablets like the iPad or reMarkable can adapt pen and paper into the world of digital media. In doing so, they trade away some of paper’s advantages like cheapness and tangibility. In exchange, we get new computational powers like nondestructive editing and ease of transmission
Turing Machines
ALAN M. TURING 23 June 1912 – 7 June 1954 F | | P(T) R P(u) R P(r) R P(i) R P(n) R P(g) R P( ) R P(M) R P(a) R P(c) R P(h) R P(i) R P(n) R P(e) R P(s) R -> B B | | L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) L P( ) -> F 2024-12-20 Translations: English, Spanish In 1928, David Hilbert, one of the most influential mathematicians of his time, aske
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
Today we’re excited to announce the release of TypeScript 5.6! If you’re not familiar with TypeScript, it’s a language that builds on top of JavaScript by adding syntax for types. Types describe the shapes we expect of our variables, parameters, and functions, and the TypeScript type-checker can help catch issues like typos, missing properties, and bad function calls before we even run our code. T
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
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
Today we are excited to announce the Release Candidate (RC) of TypeScript 6.0! To get started using the RC, you can get it through npm with the following command: npm install -D typescript@rc TypeScript 6.0 is a unique release in that we intend for it to be the last release based on the current JavaScript codebase. As announced last year (with recent updates here), we are working on a new codebase
Why People are Angry over Go 1.23 Iterators - gingerBill
NOTE: This is based on, but completely rewritten, from a Twitter post: https://x.com/TheGingerBill/status/1802645945642799423 TL;DR It makes Go feel too “functional” rather than being an unabashed imperative language. I recently saw a post on Twitter showing the upcoming Go iterator design for Go 1.23 (August 2024). From what I can gather, many people seem to dislike the design. I wanted to give m
agent loop ���� �G�� You are Manus, an AI agent created by the Manus team. You excel at the following tasks: 1. Information gathering, fact-checking, and documentation 2. Data processing, analysis, and visualization 3. Writing multi-chapter articles and in-depth research reports 4. Creating websites, applications, and tools 5. Using programming to solve various problems beyond development 6. Vario
Today, personal computing is organized around apps: large prefabricated units of software developed by professionals for the masses, with few opportunities for customization. How might we reorient computing so that people can deeply tailor software to meet their unique needs? We think a promising workflow is gradual enrichment from docs to apps: starting with regular text documents and incremental
--- name: skill-creator description: Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations. license: Complete terms in LICENSE.txt --- # Skill Creator This skill provides guidance for creating effective skills. ## About Skills S
Processing Arrays non-destructively: `for-of` vs. `.reduce()` vs. `.flatMap()`
Processing Arrays non-destructively: for-of vs. .reduce() vs. .flatMap() In this blog post, we look at three ways of processing Arrays: The for-of loop The Array method .reduce() The Array method .flatMap() The goal is to help you choose between these features whenever you need to process Arrays. In case you don’t know .reduce() and .flatMap() yet, they will both be explained to you. In order to g
Version 1.108 is now available! Read about the new features and fixes from December. Update 1.75.1: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the January 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: Profiles -
Update 1.60.1: The update addresses these issues. Update 1.60.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the August 2021 release of Visual Studio Code. There are many updates in this version that we hope you will like, some of the key highlights include: Automatic language detection - Programming l
For the last year, I’ve been working as part of the Chrome built-in AI team on a set of APIs to bring various AI models to the web browser. As with all APIs we ship, our goal is to make these APIs compelling enough that other browsers adopt them, and they become part of the web’s standard library. Working in such a fast-moving space brings tension with the usual process for building web APIs. When
From TypeScript To ReScript | Serhii Potapov (greyblake)
Serhii Potapov January 12, 2022 #rescript #typescript #javascript #fp About three weeks ago I decided to completely rewrite the frontend of Inhyped.com from TypeScript to ReScript. In this article, I'd like to share my experience and learnings. You can see my tweets regarding the rewriting, they're marked with hashtag #FromTypescriptToRescript. The source code of both TypeScript and ReScript versi
Today we are excited to announce the availability of TypeScript 5.6 Beta. To get started using the beta, you can get it through NuGet, or through npm with the following command: npm install -D typescript@beta Here’s a quick list of what’s new in TypeScript 5.6! Disallowed Nullish and Truthy Checks Iterator Helper Methods Strict Builtin Iterator Checks (and --strictBuiltinIteratorReturn) Support fo
Introduction: These Aren’t the JSONs You’re Looking For JSON (JavaScript Object Notation) was designed as a simple, lightweight, and human-readable data interchange format, often positioned as a more accessible alternative to XML. It has become the de facto standard for web APIs and system integration. However, while the specification itself is straightforward, different programming languages and
How to process a CSV file five times faster in NodeJs with Rust and Napi rs
How to process a CSV file five times faster in NodeJs with Rust and Napi rsAdded 2 years ago - 15 min read napi.rsnode.jsrust-languagecsv-processingperformance-tunning Intro CSV file Nodejs processing Rust processing Napi rs Conclusion Intro This tutorial will teach us how to process a CSV file in NodeJs with Rust and Napi rs. We will use the Rust programming language to speed up the processing of
The Watermelon Operator
Sep 24, 2024 In these two most excellent articles, https://without.boats/blog/let-futures-be-futures and https://without.boats/blog/futures-unordered, withoutboats introduces the concepts of “multi-task” and “intra-task” concurrency. I want to revisit this distinction — while I agree that there are different classes of patterns of concurrency here, I am not quite satisfied with this specific parti
Scheduling Internals
A sneak peek to what's coming! I remember when I first learned that you can write a server handling millions of clients running on just a single thread, my mind was simply blown away 🤯 I used Node.js while knowing it is single threaded, I used async / await in Python, and I used threads, but never asked myself "How is any of this possible?". This post is written to spread the genius of concurrenc
How fast is javascript? Simulating 20,000,000 particles The challenge, simulate 1,000,000 particles in plain javascript at 60 fps on a phone using only the cpu. Let's go. Ok, this is not a particularly difficult challenge if you did all the work on a gpu but the rule of the challenge is to use the CPU only or as much as possible and to stay in js land so no wasm. I know what you are thinking. This
AITOW/README.md at master · rayfrankenstein/AITOW
#AgileKillsKittens (or Agile In Their Own Words: The Problem With Agile & Scrum) A curated list of negative developer comments about Agile and Scrum on social media (Please note that while the word “Scrum” has been kept intact in the quoted comments, the reader should make no distinction between Scrum and Agile. The corporate world makes no distrinction, and we should not give others the defense o
Release date: September 11, 2025 Update 1.104.1: The update addresses these issues. Update 1.104.2: The update addresses these issues. Update 1.104.3: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the August 2025 release of Visual Studio Code. There are many updates in this version that we hope you'll li
Django for Startup Founders: A better software architecture for SaaS startups and consumer apps
In an ideal world, startups would be easy. We'd run our idea by some potential customers, build the product, and then immediately ride that sweet exponential growth curve off into early retirement. Of course it doesn't actually work like that. Not even a little. In real life, even startups that go on to become billion-dollar companies typically go through phases like: Having little or no growth fo
LSP could have been better
Oct 12, 2023 We talk about programming like it is about writing code, but the code ends up being less important than the architecture, and the architecture ends up being less important than social issues. The Success and Failure of Ninja The Why LSP post discusses the “social issues” solved by LSP. LSP (as a part of overarching Microsoft strategy) is brilliant, because it moved the world to a new
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The Prompt Engineering Playbook for Programmers
Elm at Rakuten | Rakuten Engineering Blog
Writing a C compiler in 500 lines of Python
Inkbase: Programmable Ink
June 2022 (version 1.69)
Announcing TypeScript 5.6 - TypeScript
July 2022 (version 1.70)
Announcing TypeScript 6.0 RC - TypeScript
Manus tools and prompts
Potluck: Dynamic documents as personal software
prompts.chat - AI Prompts Community
January 2023 (version 1.75)
August 2021 (version 1.60)
Designing the Built-in AI Web APIs
Announcing TypeScript 5.6 Beta - TypeScript
JSON is not JSON Across Languages | Dochia CLI Blog
How fast is javascript? Simulating 20,000,000 particles
August 2025 (version 1.104)