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Day 125 of Learning MERN Stack

Hello Dev Community! 👋 It is officially Day 125 of my software engineering marathon! Today, I crossed an elite milestone in frontend data architecture: moving completely away from local hardcoded mock lists by connecting my centralized state management infrastructure to live third-party servers using the Fetch API alongside Async/Await ! ⚛️🌐⚡ Now, the social media feed dynamically handles server-side data models, passes payloads to an active state reducer, and broadcasts states down to presentation layers via a custom Context portal! 🛠️ Deconstructing the Day 125 Async Network Lifecycle As shown inside my development setup across "Screenshot (279).png" , "Screenshot (280).png" , and "Screenshot (281).png" , the application state engine is clean and modular: 1. Extensible Central State Reducers ( PostList.jsx ) Engineered explicit structural actions inside the reducer core to seamlessly support both user generation and full-scale network array overriding: javascript } else if (action.type === "NEW_INITIAL_POSTS") { NewPostValue = action.payload.posts; }

2026-07-10 原文 →
AI 资讯

Show HN: Microcosm Industries – Simulation toys and software microcosms

I’ve been obsessed with simulation toys (software that allows you to play with a complex miniature world) ever since I was young and playing with SimCity and cellular automata. This kind of software exists at the delightful and weird intersection of simulation, complexity science, education, and gaming. And I want more of it! I created Microcosm Industries to initially act as a clearinghouse for simulation toys that are being built, ones that allow the user to playfully grapple with complex syst

2026-07-10 原文 →
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AI Surveillance and Social Progress

In the near future, AI -powered surveillance systems will be able to track everything we do in public, and much of what we do in private. And if we do something wrong—shoplift, litter, jaywalk, you name it—the system will notice, retain it, tie it to your official government record, communicate that fact to you, and provide real-time alerts to any relevant authorities… and maybe also to the general public. Think of these systems as automated speed cameras, but on steroids. Only they’ll enforce not just speed limits, but any other rule you can imagine. And you won’t receive a ticket weeks later by mail; you’ll be informed about and fined for your violation immediately...

2026-07-10 原文 →
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Server Components vs Client Components: The Mental Model Shift Every Vite Developer Needs

Introduction If you have been building applications using Vite, you are likely used to a specific workflow: write React components, bundle them with esbuild/Rollup, and serve a single HTML file that fetches a large JavaScript bundle. In this world, everything is a "Client Component." However, as the React ecosystem shifts toward the App Router and React Server Components (RSC), the architecture is fundamentally changing. For developers moving from a Vite-centric mindset to a Next.js framework, the biggest hurdle isn't the syntax—it's the mental model. In this guide, we will break down the core differences between Server and Client components and how to adapt your Vite-based habits to this new reality. The Vite World: Single-Page Application (SPA) Default In a standard Vite + React project, your entire application lifecycle happens in the browser. The browser requests the page. The server sends a nearly empty index.html . The browser downloads the JS bundle. React hydrates the app, fetches data from an API via useEffect , and renders the UI. While this is excellent for developer experience (DX) and highly interactive dashboards, it often leads to "Layout Shift" and slower "Time to Interactive" for content-heavy pages because the client has to do all the heavy lifting. The Shift: Thinking in "Environment Splits" With React Server Components, the paradigm shifts from "Everything happens on the client" to "Compute where it makes sense." 1. What are Server Components? By default, in the Next.js App Router, every component is a Server Component. These components execute only on the server . They never send their code to the client-side bundle. This allows you to: Access backend resources directly: You can query your database or file system inside the component. Keep secrets safe: API keys and sensitive logic stay on the server. Reduce bundle size: Large dependencies (like a markdown parser or date library) stay on the server and only the resulting HTML is sent to the user

2026-07-10 原文 →