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共 27243 篇Best Car Vacuums (2026): Handheld, Cordless, Shopping Tips
These portable vacuums make quick work of snack crumbs, tracked-in dirt, pet hair, and the mysterious debris beneath your seats.
There Are 2 Eclipses This August. Here’s How to See Them
Everything you need to know about the solar eclipse and lunar eclipse that will occur in August 2026.
The Best Kids’ Backpacks for the 2026 School Year
Your kid’s little lunch hauler takes a brutal beating every day. These are the backbacks our own kids have tried and loved.
Is It Possible to Make Smart Glasses That Aren’t Creepy?
As more big companies invest in glasses that record audio and video and pack AI on board, privacy concerns are only getting louder.
Best AI Code Review Tools for GitHub in 2026
Hello Devs 👋 AI coding assistants have dramatically accelerated code generation. Whether you're using Cursor, GitHub Copilot, Claude Code, or Windsurf, writing code is faster than ever. The challenge is that code review hasn't improved at the same pace. Teams are shipping larger pull requests, reviewing more AI-generated code, and spending increasing amounts of time validating whether changes are actually correct, maintainable, and aligned with existing architecture. That's exactly why AI code review tools have become a key part of modern GitHub workflows. The problem is that not all AI review tools solve the same problem. Some generate pull request summaries. Some focus on security and compliance. Some extend traditional static analysis. Others attempt to understand repository-wide context and review changes the way an experienced teammate would. If you're evaluating AI code review tools for GitHub, here's a practical comparison of the most widely discussed options in 2026. ⚡ Quick Verdict Qodo stands out for teams that need automated pull request reviews with repository-wide context, not just diff analysis. The GitHub integration is straightforward, reviews run automatically on pull requests, and the platform focuses on understanding dependencies, related files, and existing code patterns across the repository. For small projects, lightweight review tools may be sufficient. For larger codebases, AI-generated code, and complex pull requests, context-aware review becomes significantly more valuable. What Makes a Good GitHub AI Review Tool? Before comparing tools, it's worth defining what actually matters. For most engineering teams, four factors determine whether an AI review tool provides real value. 1. Integration Reviews should appear where developers already work, directly inside GitHub pull requests. Nobody wants another dashboard, notification stream, or workflow to manage. 2. Review Quality Useful reviews surface meaningful issues, not just more comments. The
React Mastery Series – Day 19: Routing in React – Building Single Page Applications with React Router
Welcome back to the React Mastery Series ! In the previous article, we explored Custom Hooks in React and learned how reusable logic helps developers build scalable and maintainable applications. Today, we will explore one of the most important concepts in modern frontend development: React Routing Almost every real-world React application contains multiple screens: Login Dashboard Profile Settings Reports Transactions Admin panels But React applications are usually built as: Single Page Applications (SPA) So how do we navigate between different pages without refreshing the browser? The answer is React Router What is Client-Side Routing? Traditional websites work like this: User Clicks Link | ↓ Browser Requests New HTML Page | ↓ Server Sends Page | ↓ Browser Reloads Every navigation causes a full page refresh. React Single Page Applications work differently: User Clicks Link | ↓ React Router Intercepts Request | ↓ URL Changes | ↓ React Loads Component | ↓ No Page Refresh This creates a smooth application experience. What is React Router? React Router is a library that enables navigation between different components based on the URL. Example: /login /dashboard /profile /settings Each URL maps to a React component. Example: /login | ↓ Login Component /dashboard | ↓ Dashboard Component Installing React Router For a React application: npm install react-router-dom The package provides: BrowserRouter Routes Route Link Navigate useNavigate useParams Setting Up BrowserRouter The first step is wrapping your application. Example: import { BrowserRouter } from " react-router-dom " ; import App from " ./App " ; ReactDOM . createRoot ( document . getElementById ( " root " )). render ( < BrowserRouter > < App /> </ BrowserRouter >, ); Now React can manage browser navigation. Creating Routes Routes define which component should display for a URL. Example: import { Routes , Route } from " react-router-dom " ; function App () { return ( < Routes > < Route path = "/" element = { < Ho
Your agent's memory is a vector store. Ask it "how many" and watch it fall over.
Originally published at nlqdb.com/blog The standard agent-memory build is an afternoon of work: embed every fact worth keeping, upsert it into a vector store, and before each reply pull the top-k most similar memories back into context. And for what it's built for, it works. Ask "what did this user say about the Berlin migration" and the right snippets come back, ranked by cosine distance. Recall is solved enough that it feels like memory is solved. Then the agent has been running for a month, and you ask its memory a different kind of question: "how many users asked about pricing this month?" "Average deal size per stage?" "Top 10 topics I logged, ranked by count?" The store dutifully returns the twenty memories most similar to the question text , the LLM eyeballs them, and you get a confident, specific, wrong number. Recall is similarity. Reporting is aggregation. Nothing malfunctioned — the two questions want different machines. A vector store's primitive is nearest-neighbour search: embed the query, rank stored vectors by distance, return the top-k, optionally narrowed by a metadata filter. That is the whole contract. There is no COUNT , no GROUP BY , no JOIN , no HAVING — a similarity engine ships no query planner, and even the metadata filter only narrows candidates around the approximate search, so what comes back is still a ranking of similar items, never a computed result set. "How many" has to touch every matching row . If the agent logged 4,000 memories and top-k is 20, the context the LLM sees is structurally incapable of producing the count — and an LLM doing arithmetic over a retrieved sample is a hallucination generator, not a query engine. The failure is quiet, too: the answer arrives fluent and plausible, and nothing flags that it was computed from half a percent of the data. -- "top topics this month, ranked by count" is not a similarity query. -- It's this — and it must scan every matching row, not the top-k: SELECT topic , count ( * ) AS mentions
Added Tutorial Mode | Moksha
🕉️ Devlog — गुरु-दीक्षा: Teaching Karma Without Breaking Immersion "गुरु बिना ज्ञान नहीं।" Without a Guru, there is no knowledge. The Problem Moksha is a game rooted in Sanatan Shastra — Vedic Karma mechanics, Sanskrit concepts, rebirth cycles. It's intentionally deep. And that depth was quietly becoming its biggest barrier. New players would start the game and immediately face naama-jaap, vairaagya, prarabdha, chetana-jagriti — all at once, with no guidance. Within the first 30 seconds, most had no idea what they were doing or why. The game needed a tutorial. But it needed one that didn't betray what Moksha is. Why a Normal Tutorial Wouldn't Work The obvious solution — pause the game, show a tooltip, unpause — felt completely wrong for Moksha. Spiritually, a hard pause breaks the flow of consciousness. Mechanically, isPaused = true is deeply wired into audio ducking, gamepad state, and ambient layers. Hijacking it for tutorial logic would have introduced subtle bugs across every system. An earlier attempt at a tutorial (Issue #30) tried to live inside engine.js itself. That was worse — the engine is already the heaviest file in the codebase, and embedding tutorial step state there violated the entire modular architecture we'd been building toward. So I scrapped both approaches and started over. The Solution: गुरु-दीक्षा (Guru's Initiation) The new system is built around one philosophical reframe: a Guru doesn't stop the world to teach. They walk alongside you. This became the technical foundation too. A New Module — src/tutorial.js TutorialManager is a self-contained ES6 class. It doesn't import from engine.js or touch any game state directly. Instead, main.js passes it an engine state snapshot every frame via checkCompletion(state) . The tutorial reads — never writes. engine.js ──(no connection)──> tutorial.js main.js ──(snapshot feed)──> tutorial.js Zero coupling. Zero risk to existing systems. Slow Motion, Not Hard Pause When a tutorial card is visible, the game
Halfway Through the MLH Production Engineering Fellowship
I'm halfway through the MLH Production Engineering Fellowship, and while I've learned a lot technically—from Linux fundamentals, Docker, NGINX, automated testing, and contributing to open source, the thing that has stood out to me most is how well the program is structured. Beyond the technical curriculum, there is a strong emphasis on interview preparation and career growth. We’ve had regular opportunities to practice technical interviews, receive feedback, and stay in close contact with our Meta mentors, who have been incredibly approachable throughout the program. Looking forward to seeing what the second half of the fellowship has in store. Thanks to the MLH team, mentors, and my podmates for making it such a rewarding experience so far!
Building a low-friction DBT skills companion for the web
I built DBT Companion, a free, mobile-friendly web app for exploring skills commonly taught in dialectical behavior therapy: https://dbt-companion.org The main product constraint was brevity without making the material vague. Each skill combines a short explanation with steps someone can follow. Users can also save favourites and use a browser-based diary card. A few implementation priorities were: making the core content usable on small screens keeping navigation predictable making privacy language visible rather than burying it keeping the stack simple with Rails, Hotwire, and Tailwind Diary cards are saved only in this browser's cookies. If cookies are cleared, saved diary cards will be lost. The app is educational, not a replacement for therapy, crisis care, or professional support. I'd welcome feedback on the accessibility, mobile interface, or anything in the privacy wording that could be clearer.