JavaScript

Node.js 26.8.2 (Current)

Node.js 24.21.0 (LTS)

Go Concurrency Quest: Goroutines, Channels, and The Matrix

The Quest Begins (The "Why") I was building a simple image‑downloader that needed to fetch dozens of URLs at once. My first attempt looked like this: var wg sync.WaitGroup results := make([][]byte, len(urls)) for i, u…

Why Most Video Downloaders Suck (And How I Built a Fast, Ad-Free Alternative)

If you've ever tried downloading a clip from YouTube, TikTok, or Instagram for a video edit, presentation, or offline archiving, you know the pain: Most existing web downloaders are absolute nightmares. You click…

Agent xoá test để build xanh: dựng cổng chặn đọc từ git

Originally published on NextFuture Coding agent sửa test đỏ bằng cách xoá nó. Build chuyển xanh, bug production vẫn nguyên, và không ai trong team biết vì diff nhìn rất gọn. Bài spike này mô tả một cổng chặn đọc thẳng…

Giảm chi phí LLM API: 3 đòn bẩy có số liệu cho dev Việt

Originally published on NextFuture Hóa đơn LLM tháng này của bạn tăng 40% nhưng traffic thì đứng yên. Bạn mở dashboard, thấy tổng token, và không biết cắt chỗ nào trước. Phần lớn chi phí đó không đến từ việc dùng nhiều…

Got tired of rewriting Express boilerplate, so I built a zero-config alternative

Juggling client contracts and building full-stack applications means spinning up new backends constantly. But manually wiring up Express routers, configuring JWT authentication, and setting up Zod validation for every…

Building Co-Shop: A Shared Cart for Humans and AI Agents with WebMCP

The problem with "agentic" web apps today Ask most AI agents to shop for you online right now, and here's roughly what happens under the hood: the agent opens a headless browser, loads the page, tries to parse the DOM,…

I shipped a Chrome extension, then found a permission bug and a hidden analytics call in the same week

The problem I was scratching Every time I was debugging a web app, the same friction kept happening: I'd see a request in Chrome DevTools' Network tab, and to actually test a variation of it — a different header, a…

Leveling Up Your Code: C++ STL Secrets Every Competitive Programmer Needs (Like a Jedi Master)

The Quest Begins (The "Why") Picture this: I’m staring at a Codeforces problem that asks me to maintain a dynamic set of numbers, constantly inserting, erasing, and querying the smallest element. My first attempt? A…

Por qué el texto invisible funciona en el nombre de TikTok y falla en el usuario de Instagram

Cada tanto vuelve la misma pregunta con otro disfraz: cómo poner el nombre invisible en TikTok, cómo mandar un mensaje vacío en WhatsApp. En 2026 la de moda es la de TikTok, y casi ningún video explica el mecanismo. Va…

Trustlines: Why XRPL Holder Counts Are Hard to Fake

Most chains let anyone push a token balance into any address for free. That is why "holders" is a nearly meaningless metric almost everywhere — an airdrop to 100,000 addresses costs the sender gas and nothing else. The…

Stop Letting Dirty Data Break Your Knowledge Graph: Mastering Entity Resolution & Deduplication in TypeScript

Enterprise knowledge graphs are rarely born pristine. They are typically assembled from fragmented, noisy, and heterogeneous data streams. If you are building modern enterprise AI applications, you have likely run into…

Bridging RxJS BehaviorSubject and React with useSyncExternalStore

If you keep shared, mutable state in an RxJS BehaviorSubject — a WebSocket connection status, a design-system theme, a cache shared between routed pages — you eventually need to read that state from a React component…

How To Buy Verified iCloud Accounts USA, UK, Canada,

iCloud Email Accounts: A Complete Guide to Digital Communication, Organization, and Everyday Learning Meta Description Learn how iCloud Email Accounts support communication, organization, digital literacy, productivity,…

You Don't Need Acrobat to Redact a PDF: A Browser-Native Pipeline Using pdf.js and pdf-lib

Redaction sounds simple. Draw a black box over the sensitive part, export, done. But a PDF is not a photograph. It is a structured document format with a content stream, a font table, an object graph, and in most cases,…

Automating Google Sites: What Worked, What Failed, and What Cost a Rebuild

We needed to publish a 2,921-word article into new Google Sites from a script as part of shipping a model comparison. There isn't an API for the current version of the editor, so we had to test every programmatic input…

Building a Spacebar-Specific CPS Test: What I Learned About Measuring Keyboard Input Speed

Most click-speed testers online are built around the mouse. I wanted something that measured spacebar speed specifically, since that's what matters for a lot of gamers — Minecraft PvP in particular, where spacebar…

FM / 6 — I made a six-operator browser synth in an evening

I made this in an evening with the new Astra, if anyone is interested. Six operators, two keyboards — a sound you can take apart. It runs in the browser (WebAssembly + Web Audio). Start with a bell, a bass, or a slowly…

Thirteen npm packages, 48 seconds, one fake wallet SDK

On the morning of 7 September 2026, GitHub's Advisory Database published malware advisories for 13 npm packages, one after another: base-account-core, base-app-data, scw-core, scw-mobile, cb-wallet-env,…