今日精选
HOT最新资讯
共 31751 篇How Netflix Built GenPage: a Single GenAI Model to Build Personalized Homepages
GenPage is a generative AI system developed by Netflix to replace its traditional multi-stage recommendation pipeline by directly generating personalized user homepages. GenPage leverages user history and request context as a prompt to produce the entire page, resulting in improved user engagement and reduced serving latency. By Sergio De Simone
Kodak EC35 is a dirt-cheap point-and-shoot film camera
Following the success of its $99 Kodak-branded Snapic A1, Reto Project is releasing the Kodak EC35, an even more affordable 35mm film camera for just $34.99. The EC35 certainly isn't fancy. Its 25mm acrylic lens with a fixed f/10 aperture and 1/100 shutter speed basically put it on par with a drugstore disposable. The fact […]
Can an Apple lawsuit derail OpenAI’s hardware plans?
On the latest episode of Equity, we debate whether Apple's lawsuit will cast over OpenAi's much-discussed plans to get into hardware and go public.
NASA shares beautiful timelapse of the Psyche spacecraft's view over Mars
The spacecraft made a close approach to the red planet in May on its way to explore the asteroid it's named after.
How We Distribute Video Events Across Regions With NATS JetStream
When a new video shows up in one of our regional crawlers, three things need to happen almost immediately: the SQLite FTS5 search index for that region needs a new row, the discovery ranking cache needs to be invalidated, and the sitemap generator needs to know a URL was born. For a long time we did all of this inline, inside the same cron process that fetched the video. It worked until it didn't. A slow FTS5 rebuild would stall the fetch loop, a sitemap write would fail silently, and a crash halfway through meant one region had the video indexed and another didn't. The fetch and the fan-out were fused together, and every failure was a partial failure. The fix was to stop treating "a video was discovered" as a function call and start treating it as an event. At TrendVidStream we run discovery across 8 regions, and the moment we introduced NATS JetStream as the spine between the crawler and the downstream consumers, the whole system got calmer. This post is the concrete version of how we did it: the stream config, the publishers, the consumers, and the mistakes we made that you can skip. Why Not Just Use a Queue Table in SQLite We already had SQLite everywhere, so the obvious move was a jobs table. We tried it. The problems showed up fast: Polling latency vs. load tradeoff. Poll every second and you hammer the DB with mostly-empty SELECT queries across 8 regions. Poll every 30 seconds and your search index lags noticeably behind your crawler. No fan-out. One row, one worker. If the sitemap generator and the FTS5 indexer both need the same event, you either duplicate rows or invent a consumed_by bitmask. Both are ugly. Locking. SQLite's writer lock means the queue table and the actual data table start contending under the multi-region cron bursts we run. Cross-region delivery. Our regions aren't all on the same box. A queue table doesn't cross machines without you building a replication story on top. JetStream solves all four: push-based delivery (no polling), multipl
Week 2: I Found the Best Free Blockchain Course on the Internet — Here's My Honest Review
My Zero to Blockchain Engineer journey — Week 2 update Last week I announced I was teaching myself blockchain engineering from zero. This week I went deep into Cyfrin Updraft — and I have to be honest, it changed how I think about learning Web3. Here's everything I covered, what surprised me, and why I think this platform is the best free resource for anyone serious about becoming a blockchain developer. What I covered this week I'm currently 45% through the Blockchain Basics course on Cyfrin Updraft. Here's exactly what the lessons covered: Section 1 — What Is A Blockchain? This section answered the question properly — not in a surface-level way, but by starting with the problem blockchain solves. The lesson on centralized control hit differently. Think about it in a Nigerian context — banks freezing accounts, payment processors blocking transactions, elections where results can't be independently verified. These aren't hypothetical problems. They're things we live with. Blockchain's answer: a shared ledger where truth is verified by math, not by a middleman. That framing made everything click for me. Key lessons I completed: What Is A Blockchain — centralized problems vs decentralized solutions History Of Blockchain — from the double-spend problem to Bitcoin to Ethereum Benefits Of Blockchain — permissionless, immutable, credibly neutral Use Cases — DeFi, cross-border payments, DAOs, digital ownership Many Many Chains — L1s, L2s, Mainnets vs Testnets The Oracle Problem — why smart contracts can't access real-world data alone The Purpose Of Smart Contracts — math-based promises vs trust-based agreements What Is The EVM — Ethereum's computation engine explained simply Benefits Of Smart Contracts — decentralization, immutability, transparency Section 2 — Sending Transactions This is where things got hands-on — and where Cyfrin pulled ahead of every other platform I've tried. Key lessons: What Is A Wallet — your public address as a digital mailbox Setting Up A Wallet
On-Premise AI Code Review: How We Deployed Claude Locally in an Air-Gapped Environment (Setup Guide)
The security officer said no. Not "maybe with some modifications." Not "let us review the data handling policy." No. Cloud-hosted AI code review was not going to happen in their environment. The codebase contained classified material. The network was air-gapped. No data leaves the building. End of conversation. This was a defence contractor. Their development team was writing code that couldn't touch any external API, any cloud service, any SaaS platform. But they were also writing 200,000+ lines of code per year with a team that was struggling to maintain review quality across twelve engineers, the exact problem that AI code review solves. The challenge: deploy AI code review capability that runs entirely on-premise, in an air-gapped network, with no external connectivity, while meeting the security and compliance requirements of a classified computing environment. This is the guide we wish existed when we started that project. It covers hardware requirements, model selection, inference server setup, CI/CD integration and the security architecture that made it pass the compliance review. Why air-gapped AI code review is different from everything else Most AI code review guides assume cloud connectivity. The model runs on the provider's infrastructure. The code is sent via API. The review comes back. The security question is about data handling policies, encryption in transit and vendor trust. In an air-gapped environment, none of that applies. The model runs on hardware you control. The code never leaves your network. There is no vendor to trust because there is no vendor in the loop. This sounds simpler from a security perspective. In some ways it is. In other ways it's significantly more complex because you're now responsible for the entire stack, model selection, quantisation, inference hardware, deployment, monitoring, updating and maintaining the system that in a cloud deployment is someone else's problem. Hardware requirements The hardware question is the fir
What Is a Pointer in C? A Beginner's Guide
What Is a Pointer in C? A Beginner's Guide If you're learning C and pointers are the moment things suddenly feel harder, you're not alone. Pointers trip up more beginners than almost any other concept in the language. But the core idea is simpler than it looks once you strip away the confusing syntax: a pointer is just a variable that stores an address instead of a value. A Variable Normally Stores a Value When you write int age = 25; , C sets aside a small chunk of memory, gives it a label called age , and stores the number 25 inside it. Every variable in your program lives somewhere in memory, and every location in memory has an address, similar to a house having a street address. Most of the time you don't think about that address at all. You just use the variable name and C handles the memory bookkeeping behind the scenes. What a Pointer Actually Stores A pointer is a variable, but instead of holding a regular value like a number or character, it holds the memory address of another variable. Here's what that looks like: int age = 25 ; int * agePointer = & age ; The & symbol means "give me the address of," and * when declaring a variable means "this variable is a pointer." So agePointer doesn't contain 25. It contains the address where 25 is stored. If you want to see the value at that address, you dereference the pointer using * again: printf("%d", *agePointer); would print 25, not the address. Why Not Just Use the Variable Directly? This is the question that trips up most beginners, and it's a fair one. If you already have age , why bother with a pointer to it? The real value of pointers shows up in a few common situations: Passing large data to functions. When you pass a variable to a function in C, it normally gets copied. For a single integer that's cheap, but for a large array or struct, copying is wasteful. Passing a pointer instead means the function works with the original data directly, without duplicating it. Modifying a variable inside a function. Nor
Designing a 4D Digital Archive for Ikebana
Paper: https://dl.designresearchsociety.org/cgi/viewcontent.cgi?art... [pdf]
Backbeat Forge
Turn drum audio into a score you can actually edit Discussion | Link
Multi-Agent Interview Coach
This post is my submission for DEV Education Track: Build Multi-Agent Systems with ADK . What I Built Preparing for technical interviews can be overwhelming. I wanted to build a tool that doesn't just give generic questions, but actually analyzes my specific resume to challenge my unique skill set. This led me to build a multi-agent system using the ADK. This multi-agent system, will take user resume and extracts their profile for generating Interview Questions specialized to the candidate profile. The agents communicate in a sequential loop: The Profiler extracts data -> The Interviewer generates questions -> The Judge validates them. If the Judge rejects a question, the Interviewer re-drafts it, ensuring only high-quality, resume-relevant questions make it to the user. Cloud Run Embed Your Agents Profiler Receives a resume PDF GCS path, downloads it in-memory, parses the text content, and builds a summary of skills. Interviewer Reads the candidate summary and drafts 3 technical interview questions designed to test the boundaries of their experience. Analyzes the drafted questions. Passes the iteration if they are resume-specific; rejects/fails them if they are too generic. Key Learnings This project was a fantastic weekend challenge. Working through the Google Codelab gave me a solid grasp of agent-based architectures, specifically implementing Agent, LoopAgent, and SequentialAgent to create a robust workflow. A few key technical takeaways included: Managing Statelessness : Learning to handle agent sessions in a Cloud Run environment was a great lesson in explicit session lifecycle management. Cloud Integration : Integrating Google Cloud Storage for file handling taught me how to bridge in-memory document processing with persistent cloud storage efficiently. Deployment Architecture : Mastering the transition from local development to a containerized, production-ready Cloud Run deployment provided deep insights into modern backend orchestration. Check the Code from
Does Prisma respect Supabase RLS? No — here's why
Prisma and Drizzle connect as the postgres role and bypass Supabase RLS entirely, so your policies never protect ORM queries. Here's the fix. TL;DR: No. Prisma and Drizzle open their own direct Postgres connection and log in as the postgres role, which owns your tables and carries BYPASSRLS — so Row Level Security is skipped on every ORM query. Point your app's connection at a dedicated, non-owner NOBYPASSRLS role (and keep the auth check in your code), not at postgres . If you built your Supabase project assuming RLS is a safety net on the data itself, adding an ORM quietly punches a hole straight through it. Your policies are still there. They just never run for the ORM's connection. Here's the mechanism, the myth to unlearn, and three fixes in order of how much you should reach for them. Does Prisma respect Supabase RLS? No. RLS is not a global property of the database — Postgres enforces it per role, per statement . A policy only bites for a role that is (a) not the table's owner, (b) has no BYPASSRLS attribute, and (c) is not a superuser. The Supabase JS client satisfies all three because it reaches Postgres through PostgREST, which runs your query as the unprivileged anon or authenticated role. Prisma and Drizzle satisfy none of them: they read DATABASE_URL and open a raw SQL connection as postgres , which owns virtually every table you migrated and holds BYPASSRLS . Either fact alone is enough for Postgres to skip your policies. So the same query that returns one tenant's rows through supabase-js returns every tenant's rows through Prisma. That is not a bug in your policy — it's the connection role. Two doors into the same database There are two completely different paths to your data, and they authenticate as different roles. The supabase-js path (RLS enforced). supabase-js talks HTTP to PostgREST, not to Postgres directly. PostgREST connects as authenticator , validates the request JWT, and does a SET ROLE into anon or authenticated for the statement. Those