The signal in the feed.

Backpropagation Is Just Dynamic Programming (I Animated It to Prove It)

Everyone learns backpropagation as "apply the chain rule." Almost nobody explains why it's fast — and that "why" is the whole reason deep learning is computationally possible at all. So I animated one full training step to show the part most explanations skip. What you're actually seeing Forward pass: a single signal travels through 3 weights → a prediction → compared to the target = the loss. Backward pass: the error (δ) flows back through the network. δ₃ is computed at the output, then reused

Medieval-style fortifications are back in the Sahel

Meta, like SpaceX, looks to turn excess AI compute into cash

Meta is developing plans for a cloud infrastructure business, selling access to AI compute power and models. The move would pit it against the big cloud providers like Amazon Web Services, Google Cloud, and Microsoft Azure.

Download Rune Dice NSP Full Game Latest 2026

Download Rune Dice NSP Full Game Latest 2026 Rune Dice NSP is a fantasy-themed strategy game that combines dice-based mechanics with roguelike progression and tactical decision-making. Players embark on an ever-changing adventure where every dice roll influences battles, rewards, and the path ahead. By collecting powerful runes, upgrading abilities, and adapting to randomized encounters, you'll build unique strategies to overcome increasingly difficult enemies and unpredictable challenges. The g

Why I Stopped Arguing with People

Article URL: https://wangcong.org/2026-06-30-why-i-stopped-arguing-with-people.html Comments URL: https://news.ycombinator.com/item?id=48746445 Points: 420 # Comments: 331

UK likely to intervene in Paramount takeover of Warner Bros Discovery

The acquisition was approved without concessions by the Department of Justice in June.

The Vespa at 80: Why the Italian scooter remains the coolest thing on 2 wheels

Global State in Next.js App Router — Zustand Over Context for Most Use Cases

React Context works. It's built-in, requires no dependencies, and handles many state management needs fine. It also causes the specific problem that leads developers to look for alternatives: unnecessary re-renders when the context value changes. For small amounts of global state — a theme preference, a user session — Context is fine. For anything with more frequent updates or more complex structure, Zustand is meaningfully better and the migration is straightforward. Here's the practical compar

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The Quest Begins (The "Why") Honestly, I was stuck in a loop of endless AJAX polling. Every few seconds my frontend would hammer the server with a GET request just to see if a new chat message had arrived. It felt like I was playing Whac‑A‑Mole with my own bandwidth—constantly chasing updates that rarely existed. Users complained about lag, my CPU spiked, and the whole thing smelled like a hackathon project that never quite shipped. One night, after yet another 3 a.m. debug session where I watch

Designing DB partitions you don't have to babysit

Internal Combustion Engine

Rayfish, Peer-to-peer mesh VPN with no server to trust