Show HN: Run AWS Cedar Policy Like OPA https://ift.tt/ipejmnt

Show HN: Run AWS Cedar Policy Like OPA https://ift.tt/iP9IYk7 May 15, 2023 at 02:55AM

Show HN: I built my first Cyberdeck https://ift.tt/JHxRcm8

Show HN: I built my first Cyberdeck https://ift.tt/xGBviKP May 15, 2023 at 12:08AM

Show HN: Tack, a fast lightweight scripting language for games and embedding https://ift.tt/1L9ztUa

Show HN: Tack, a fast lightweight scripting language for games and embedding https://ift.tt/i2HoaCt Hi HN! Tack is a scripting language I've been working on sporadically for the past year or so, and intensely for the past few weeks. It originated out of a desire for something that was like Lua, but with a more familiar syntax, and without some of the other surprises in Lua such as the 1-indexed tables. It's also been a great learning project, and a very satisfying challenge! While the current version is early beta at best, I hope to continue working on it and maybe see some adoption. Despite the relative lack of optimization, I'm very pleased with the performance so far - although I haven't done a huge amount of benchmarking, it seems to be significantly faster than the stock Lua 5.4 interpreter for the quicksort test, and the btrees test (copied from the Computer Language Benchmarks Game). The language is designed for embedding in C++ programs, and is written in C++ more or less from scratch including the handwritten recursive descent parser, and a register-based compiler/interpreter. The only dependency other than the standard library is my C++ adaptation of the khash library used for the object type - a from-scratch hashmap seemed not worth the trouble. Quick code example - more examples in the repo! fn quicksort(arr) { const n = #arr if n <= 1 { return arr } " find the midpoint " let l = min(arr) let r = max(arr) if r == l { return arr } const mid = (l + r) / 2 " split array into upper and lower " const upper = filter(arr, fn(x) { return x < mid }) const lower = filter(arr, fn(x) { return x >= mid }) " recursively sort the upper and lower sub-arrays and join the result" return quicksort(lower) + quicksort(upper) } let A = [] for i in 0, 1000000 { A << random() } let before = clock() let B = quicksort(A) let after = clock() print("Time taken: ", after - before, "seconds") Building requires just cmake and a C++20 compiler - tested with MSVC 2022, g++11 on WSL and Clang 15 on M1 https://craftinginterpreters.com was a great help with implementing closures, as I had gone down a blind alley with my first approach for locating the closed-over variables. However I have taken a slightly different approach towards boxing. As I do intend to use this for some small games myself going forward, there is a standard library already, and plans to expand it. I also intend to release a GLFW-based mini game framework along with precompiled binaries, so hobbyists (and younger relatives!) may use it without needing a full compiler toolchain. I would love if anyone is interested enough to try it out! James https://github.com/PlumeCat/tack May 14, 2023 at 11:09PM

Show HN: Torquigen,create symmetrical animated GIFs from your images https://ift.tt/Xg0d1sE

Show HN: Torquigen,create symmetrical animated GIFs from your images This is the first code I've written in WebGL2. It supports Chrome, Firefox, and Safari (macOS or ipadOS). https://torquigen.app May 14, 2023 at 10:09PM

Show HN: ts-npm-template – Template to bootstrap NPM package with TypeScript https://ift.tt/Arpk9LN

Show HN: ts-npm-template – Template to bootstrap NPM package with TypeScript https://ift.tt/6wmqlnp May 14, 2023 at 06:06PM

Show HN: WhyBot, making GPT-4 question itself https://ift.tt/K9CzdNc

Show HN: WhyBot, making GPT-4 question itself Hi HN — we’re John and Vish! We built WhyBot, a tool to help you deeply explore a question or topic. You ask a question, and WhyBot responds by building an ever-expanding knowledge graph. It does this by recursively generating answers and follow-up questions. You can change its persona to change the flavor of the generations (try toddler mode!). We originally built this for the AngelList Agent Hackathon ( https://twitter.com/AqeelMeetsWorld/status/16502799744050421... ) and got a lot of interest from folks asking to play around with it. So we thought it’d be fun to brush it up and release it as a web app! It’s a work in progress and we plan on adding more features, such as saving, sharing, focusing on one branch and potentially executing code. We hope you enjoy playing around with it and would love to hear any of your feedback or thoughts. https://ift.tt/z6XGEpD May 14, 2023 at 09:47AM

Show HN: Bytebase – a GUI-based database schema change tool for developers https://ift.tt/93qtcKH

Show HN: Bytebase – a GUI-based database schema change tool for developers https://ift.tt/BrKJOlP May 13, 2023 at 11:36PM

Show HN: MotivationalSMS – Daily Inspirational Quotes by SMS https://ift.tt/1moeuLE

Show HN: MotivationalSMS – Daily Inspirational Quotes by SMS https://ift.tt/Gdb1rTj May 13, 2023 at 05:31PM

Show HN: React 18.2 and Express 4.18 TypeScript SSR ESM stack https://ift.tt/HXKUnRF

Show HN: React 18.2 and Express 4.18 TypeScript SSR ESM stack https://ift.tt/K6zrPGj May 13, 2023 at 12:55PM

Show HN: Kaizen, music updated over time like software https://ift.tt/eavSJip

Show HN: Kaizen, music updated over time like software Hi, I'm co-founder and CTO of Kaizen. The project started as just a weekend project with me and a music producer friend. It has since grown into a community of artists looking to share their music more frequently and engage with their fans more consistently. We've just launched on ProductHunt: https://ift.tt/TL34fN9 We would love any thoughts or feedback! https://kaizen.place/ May 13, 2023 at 01:16PM

Show HN: A game about guessing which YT video is the most popular https://ift.tt/0XrFngb

Show HN: A game about guessing which YT video is the most popular https://ift.tt/bQ89xGf May 13, 2023 at 06:36AM

Show HN: React.js LLM Agent (open-source) https://ift.tt/IrqWsKa

Show HN: React.js LLM Agent (open-source) I've been working in the couple of months on an experiment, trying to make GPT-4 much more useful for web development / React, writing production code that is relevant to any repository without copy pasta from ChatGPT or having small snippets of auto-complete from Copilot that are not in your context. The agent is taking a user story text and generating and composing multiple react components to generate the relevant screens, based on atomic design principles, with Typescript, TailwindCSS and RadixUI. Is is still experimental but very interesting results, I would like to get your feedback on it! It is completely open-sourced, looking for contributors! https://ift.tt/CeFmGPM May 12, 2023 at 03:06PM

Show HN: Infinity Whiteboard, Designed for Teachers https://ift.tt/jGo8DSL

Show HN: Infinity Whiteboard, Designed for Teachers I've created a whiteboard which I use every lesson when teaching maths, though it can be used for anything. It currently has a few hundred teachers using it daily. It's designed for use with touch-screen interactive whiteboards in classrooms, and stays in sync with your phone/tablet/whatever without signup/login. You can also find me on Twitter where I post updates etc: https://twitter.com/jakegmaths Some features and cool things: * Sync devices without signup - offline by default, just hit 'sync devices' and use the same code on multiple devices to sync * Touch-first - 1 finger draws; 2 finger pan/zoom; 3 finger gestures like changing pen colour * Add images - when teaching, this is usually photos of student work taken on my phone and auto-sync'd to the whiteboard at the front of the room * Add PDFs - when teaching, these are usually past paper exams which I then annotate over with the class * Zen mode - 3 finger tap or hit the ∞ icon to hide the UI; something I use every lesson so students can focus on the actual maths (there's also a fullscreen button when not on iOS) * Visualiser - often when teaching we'll work on paper with a webcam aka 'visualiser' pointing down at it; this projects that to the main whiteboard, with optional cropping, freeze-frame and snapshots * Screencast - many teachers use eg PowerPoint to teach; instead, I'll use PowerPoint in edit/design mode rather than slideshow mode, with a locally-cast cropped portion of that on the main whiteboard at the front of the room. This enables me to eg edit my PowerPoint as I go and use all the PowerPoint tools not available in slideshow mode * Instant replay - hit the play button to play back all the scribblings currently showing on the screen * Magnet mode - when sync'd with another device, use the magnet icon so the other device follows you. Most of my teaching is now via a tablet-with-stylus anywhere in the room, and as I pan/zoom around with the tablet the main whiteboard comes with me... but only when I want it to by activating the magnet * Student mini-whiteboards (MWBs) - if my students have devices and I want them to use them, I 'sync devices' then enable student MWBs and each student has a live copy of the whiteboard, and I can see what they write and can showcase any student instantly on the main board * PWA support - install as a PWA and you can download whiteboards as .iwb files which can then be double-clicked to open/edit on desktop * Free - I have no plans to charge for this Other things you may find interesting from a tech perspective: * The client is a single <5,000 lines HTML file, with JS, CSS, SVG-favicon all inlined (plus PDF.js lazily loaded if you add a PDF) * This is vanilla Javascript with no frameworks or libraries (except PDF.js) and no minification or build scripts - just view-source and check out how ugly all my code is! * 77.6kB for everything (except PDF support)... the size of 'modern' websites frankly disgusts me * The server is just a single ~500 line Javascript file and runs on Deno (also ported to Bun but unstable for now) and really just serves some static files, deals with websockets and temporarily stores images people add * Costs ~£5/month on Heroku * There's no database or any long-term persistence - Heroku servers restart every 24h and nothing is saved beyond that; it's all ephemeral https://www.mathsuniverse.com/infinity May 12, 2023 at 06:56PM

Show HN: Explore career opportunities in AI-first companies https://ift.tt/sBycYfe

Show HN: Explore career opportunities in AI-first companies Like many unemployed right now, I've been playing with LLMs and learning a lot. It's an exciting space right now, with many opportunities. So I curated over 100 companies in the space and joined all their opportunities (not only tech) in a single site. I believe it can be interesting for many people recently affected by layoffs and looking to restart in a market that is booming — for better or worse. Exploring the data about the market is also something that I'm starting to look into [1]. Companies can be added for free and get highlighted by sponsoring the site. I hope that someone out there who is searching for a new job finds this helpful. 1- https://ift.tt/0hD7gzt... https://ift.tt/f5CPyLb May 12, 2023 at 09:40PM

Show HN: The Leica MPi: A Leica M2 with a Raspberry Pi-Powered Digital Sensor https://ift.tt/9H4mT3j

Show HN: The Leica MPi: A Leica M2 with a Raspberry Pi-Powered Digital Sensor PetaPixel article: https://ift.tt/itJ4TqM... https://ift.tt/J1Q96mt May 12, 2023 at 04:55PM

Show HN: Plan international rendezvous with different passport holders https://ift.tt/z1GNyeo

Show HN: Plan international rendezvous with different passport holders https://unli.xyz/city/honeymoon/ May 12, 2023 at 07:46AM

Show HN: Google's photorealistic 3D tiles for GPS activity visualization https://ift.tt/6Ze3Twa

Show HN: Google's photorealistic 3D tiles for GPS activity visualization I made a Proof of Concept integration of Google's new 3D tile model (which got announced today at Google's I/O) for my hiking/skiing/running app. It's basically Google Earth plus your GPS track, all the heavy lifting done by Cesium.js. I'm wondering how much this is gonna cost once it's out of experimental phase. https://ift.tt/MSjliE4 May 12, 2023 at 03:44AM

Show HN: A Tool for DJs to Talk to Spotify's Recommendations API https://ift.tt/gJikWlh

Show HN: A Tool for DJs to Talk to Spotify's Recommendations API https://ift.tt/FPsvIHm May 12, 2023 at 12:59AM

Show HN: Browsing in Public https://ift.tt/1Sq0rLv

Show HN: Browsing in Public https://inpubliq.com May 12, 2023 at 12:55AM

Show HN: Browse, upvote and comment on HN from command line https://ift.tt/YDNr21b

Show HN: Browse, upvote and comment on HN from command line Hi HN! I've built hnterminal, a pip package that lets you browse, upvote, and comment on Hacker News from your terminal. To get started: $ pip install hnterminal $ hnterminal hnterminal is an interactive REPL environment with commands like "get_front_page", "get_tree", "upvote", "reply_to", etc, each of which supports rich arguments and comes with full help documentation. Checkout the readme. https://ift.tt/0srbB6H May 11, 2023 at 09:57PM