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Article URL: https://www.youtube.com/watch?v=9EuNUe-CJRM Comments URL: https://news.ycombinator.com/item?id=49605222 Points: 16 # Comments: 2

When shopping for an electric vehicle, affordability is becoming a more common trait. But affordable and energy efficient is truly a rare breed. Often you have to sacrifice one for the other. Want something affordable? Great, here's a range loser. Want something that goes the distance? Be ready to pay the price. Surprisingly, here comes […]

barometer.today shows air pressure for any city: the reading now, the change since yesterday, and the week ahead. It also has a world isobar map, animated hour by hour from a day back to four days ahead. This post explains what isobars are and the algorithms that we use to draw them. The code is Python with numpy, scipy, contourpy and shapely, and anyone drawing contour maps from gridded data will meet the same problems. What an isobar is Air pressure varies from plac...

This is the first proper entry in A Field Guide to GTK Widgets — a series about which widget to reach for, when, and what bites you when you do. We start where every app starts: the window. Each post stands on its own, and the complete, runnable code for this one lives in the companion repo . Two windows, and the one you should reach for You sit down to write a GNOME app. The very first widget you need is the window, and the toolkit immediately hands you a choice it doesn'...

Liquid syntax error: Variable '{{% raw %}' was not properly terminated with regexp: /\}\}/

Ask a language model to book you a table for six this Thursday and it will do something quietly maddening. It will explain, fluently and with total confidence, exactly how one might book a table for six this Thursday. Then it will stop. Articulate, helpful, and unable to lift a finger. That gap between knowing and doing is the whole difference between a chatbot and an agent. And the reason for the gap is blunt: a language model can only ever produce text. It cannot click a button, run a progr...

Inbundly brings Google Inbox-style bundles back to Gmail: emails sharing a label are grouped into collapsible bundles so you can skim, prioritize, and archive in batches. An actively maintained, privacy-friendly continuation of the open-source Inboxy, plus custom bundles, priority rules, and label colors. 100% local. Chrome + Firefox. I built Inbundly because I still miss Inbox's way of organizing email by intent, and because I now triage my inbox together with AI agents, which work far be...

A few weeks ago I wrote about hitting ReAct in the coursework and having a record scratch moment, because I had already met it without knowing its name. That post ended on a section called "Building Ahead of Understanding," which was me making peace with shipping things before I fully understand them. This week I shipped my first chatbot. It passed on the first attempt, on deadline day, on a project where the rubric was grading a product AWS had already discontinued. And I spent most of ...

In a customer-support system, the hard part of account shutdown is deciding what must stop now and what can wait. A stolen refresh token is an immediate abuse problem; an account deletion request is a data-lifecycle problem with a different recovery window. Short answer: keep a stable user ID, mark profile state before destructive work, revoke every session for a compromise, and delete only after the recovery and audit requirements are satisfied. Profile state and session revocation are compl...

The problem OCR is only as good as the image you feed it. A scanned form that's slightly tilted, low-contrast, or has a noisy background can tank recognition accuracy — even with a good OCR engine behind it. Most of the time the fix isn't a better OCR model, it's a cleaner input image. I wanted something small I could throw a batch of images at before sending them to an OCR pipeline, so I built PrepOCR — a free image preprocessing service focused specifically on the transformations that...

Ask Gemini a question that obviously needs the live web — today’s weather where you are, a current price, whether a shop is open now — and there’s a good chance it will answer instantly, confidently, and without ever searching. No spinner, no “let me check”, no sources. Just a fluent answer assembled from whatever was in its training data, which may be months or years stale. And nothing in the reply tells you it never looked. Answer first, because the mechanism is more specific than “the AI i...

Let's talk a little about a memory leak I recently found while working with UIViewRepresentable. The issue happened in a custom UIKit view wrapped inside SwiftUI. At first, nothing looked suspicious. The view worked fine. But after navigating in and out of the screen a few times, the Memory Graph Debugger showed that the Coordinator instances kept increasing. Here is a simplified version of the setup: import SwiftUI import UIKit final class CallbackButton : UIButton ...

Short answer: treat data consent revocation and active session revocation as separate controls, then connect them with an explicit policy: stop newly forbidden data operations immediately, but terminate the whole session only when identity risk, account recovery, or regulation requires it. Decision Existing session Protected data operations Best fit Revoke consent only Keep it active Deny the withdrawn scope A user removes optional data permission Revoke sen...

Imagine you are trying to teach a robotic dog to fetch a ball in a park. You could try to write a program that calculates the exact wind speed, the angle of the grass, and the friction of the mud to tell the dog exactly how to move its leg. That sounds exhausting, and if a squirrel runs by, the dog will probably crash into a tree. Instead, what if you just gave the dog a treat every time it moved closer to the ball and took a treat away when it walked the wrong way? Eventually, the dog figure...

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How to build a self-learning game character using deep reinforcement learning, first in 200 lines of vanilla JavaScript, then again in PyTorch, and watch it go

India’s Aadhaar, UPI, and DigiLocker systems may need crypto-agility and post-quantum migration as quantum computing risks grow.

In institutional finance, AI failures often come from missing context, not bad models. Here’s why validation layers matter.

9/7/2026: Trending stories on Hackernoon today!

Bitunix is a derivative-first exchange built for traders who expect more.

Audit your AGENTS.md and skills on a schedule, or you keep paying context rent on rules the model has outgrown.

Article URL: https://kallus.org/blog/dummit_and_foote.html Comments URL: https://news.ycombinator.com/item?id=49569748 Points: 56 # Comments: 32

https://www.youtube.com/watch?v=CfjnTJos_no Comments URL: https://news.ycombinator.com/item?id=49569838 Points: 117 # Comments: 26

Article URL: https://ladybird.org/newsletter/2026-08-31/ Comments URL: https://news.ycombinator.com/item?id=49571096 Points: 135 # Comments: 27

Article URL: https://arxiv.org/abs/2607.24888 Comments URL: https://news.ycombinator.com/item?id=49575515 Points: 121 # Comments: 29

Article URL: https://mm-dev.rocks/series/decapitating-macbook-an-odyssey/ Comments URL: https://news.ycombinator.com/item?id=49583381 Points: 52 # Comments: 36

https://web.archive.org/web/20150719010624/http://www.nature... https://www.scribd.com/document/893921964/CHIANG-Catching-Cr... Comments URL: https://news.ycombinator.com/item?id=49584053 Points: 11 # Comments: 3

Article URL: https://sled.neocities.org/ Comments URL: https://news.ycombinator.com/item?id=49586139 Points: 26 # Comments: 5

Article URL: https://mceglowski.substack.com/p/icy-moons-are-ocean-worlds Comments URL: https://news.ycombinator.com/item?id=49586207 Points: 119 # Comments: 10