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Plotting 5 Years of FX in the Browser — Frankfurter API + Hand-Rolled SVG Line Chart

The "I want a USD/JPY 5-year chart on my page, no backend, no API key" target turns out to be reachable with one stack: Frankfurter (a free, CORS-enabled wrapper around the ECB's official reference rates) for the data, and a hand-rolled SVG <path> for the chart. ~350 lines of vanilla JS, 20 unit tests, ECB data updates daily. This walks through the four pieces that aren't obvious: choosing Frankfurter over the alternatives, pivoting the response into per-symbol series, the "nice numbers" a

A Nicer Voltmeter Clock

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MCP Hello Page

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Zerostack – A Unix-inspired coding agent written in pure Rust

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I tried to make Claude make me money on open-source bounties

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✦ DevPen: The AI-Powered Note-Taking App for Developers 🚀

If you’re a developer, your notes are probably a mess of snippets, architectural diagrams, and quick thoughts scattered across different apps. I built DevPen to solve this—a note-taking application designed specifically for the developer workflow.🔗 Try it live at: devpen.inIn this post, I’ll walk through the key features that make DevPen more than just another text editor. 1. The Dual-Editor Experience: Markdown + Monaco 💻Why choose between the speed of Markdown and the power of a real code

Your AI Agent Just Broke Your React Performance. It Has No Idea

React DevTools Profiler gives you all the data you need to fix re-renders. Your AI agent can't read it. Here's how to fix that with an MCP server.You open React DevTools Profiler, record a session, and export the .json file. It's got everything: which components re-rendered, how long each one took, which props changed, which hooks fired.Then you paste it into Claude or Cursor and ask: "What's causing the performance problem?"The agent stares at raw JSON — thousands of lines of fiber IDs, opcode

Node.js End-of-Life Dates - Official EOL Schedule for Every Version

Complete Node.js EOL ScheduleNode.js releases even-numbered versions as Long-Term Support (LTS). Odd-numbered versions are short-lived and never reach LTS.VersionLTS StartEnd of LifeStatusEOL Risk Score™Node.js 10Oct 2018Apr 30, 2021🔴 EOL95 CriticalNode.js 12Oct 2019Apr 30, 2022🔴 EOL92 CriticalNode.js 14Oct 2020Apr 30, 2023🔴 EOL90 CriticalNode.js 16Oct 2021Sep 11, 2023🔴 EOL90 CriticalNode.js 18Oct 2022Apr 30, 2025🔴 EOL85 CriticalNode.js 20Oct 2023Apr 30, 2026🔴 EOL78 CriticalNode.js 22Oct 2

Stop letting npm install run untrusted code on your machine — meet np-audit

npm installYou type it dozens of times a day. You probably typed it this morning. And every time you did, you handed arbitrary code execution to every maintainer in your dependency tree — and every attacker who has phished one of them.Over the last eight months, attackers have noticed. The Shai-Hulud family of worms has compromised hundreds of npm packages, created tens of thousands of malicious GitHub repos, and harvested thousands of developer secrets. The November 2025 wave alone hit 700+ pac

countapi.xyz is dead. Here's the drop-in replacement I found (and actually use)

If you've been using countapi.xyz for page view tracking, button click counters, or really anything that just needed a simple number that goes up... you've probably noticed it's gone. No announcement, no migration guide, just a dead URL.And honestly, it was one of those APIs that was so useful precisely because it asked nothing of you. No account. No API key. No SDK to install. Just fetch a URL and get a number back. It was perfect.So when it died, a lot of people were left hunting for alternati

What breaks when you ship Next.js on Cloudflare Workers

I've been building Finterm, a financial terminal that runs entirely in a browser tab, on Cloudflare Workers via @opennextjs/cloudflare. The promise is the obvious one — global edge runtime, near-zero cold starts, pay-per-request pricing. The catch is that Workers don't run Node.js. Every package in your dependency tree has to work in the Workers runtime, and a surprising number of common ones don't.This is a rough log of what I had to rip out and what I replaced it with, plus a coupl

How I built an interactive JSON visualizer in the browser (no react-flow)

Every time I debugged a deeply nested API response, I scrolled. I counted brackets. I lost my place. After the third or fourth time of doing this for the same Stripe webhook, I gave up and built a thing: paste JSON in one side, see it as an interactive graph on the other.The result is jsonbloom.com — free, runs entirely in the browser, no signup. This post is about the architecture choices behind it, because most of them turned out to be smaller decisions than I expected. Why not react-flow

Your Node.js App Is Slow. Your AI Agent Can't Help - Until Now

You've been here before.The API is dragging. P99 latency is climbing. Someone says "just profile it" — so you run node --cpu-prof and get a file like CPU.20260516.154355.cpuprofile.You open it. It's 28MB of this:{ "nodes": [ { "id": 1482, "callFrame": { "functionName": "processRequest", "scriptId": "94", "url": "file:///app/dist/server.js", "lineNumber": 847, "columnNumber": 12 }, "hitCount": 3241, "children": [1483, 1490, 1501] }, { "id": 1483, "callFrame": { "functionName": "parseBody",

Merge Sort vs Bubble Sort — Why 800 Comparisons Beats 147 Every Time

Most developers know Merge Sort is faster than Bubble Sort. But watching it happen makes the difference visceral. The NumbersBubble Sort: 800+ comparisonsMerge Sort: 147 comparisonsSame 30 elements. Same result. Why Such a Difference?Bubble Sort compares adjacent elements and moves them one step at a time — O(n²) in worst case.Merge Sort divides the array completely down to single elements, then merges them back in sorted order — O(n log n) guaranteed every single time. The Key Co

React vs Next.js: Two tools, a different purpose

For a long time I used React for everything. It worked. Until it wasn't enough.There were projects where React solved exactly what I needed. Dynamic interfaces, manageable state, reusable components. The workflow was comfortable and I knew it well.But then came projects where those same patterns started generating friction. SEO was a constant headache. Load times weren't what they should be. The setup before writing any useful code kept feeling longer and longer.When I started working with Next.

4 Best Sites to Buy Negative Google Reviews

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Safdar Ali — Senior React & Next.js Developer, Bengaluru India

I'm Safdar Ali, a Senior Frontend Engineer based in Bengaluru, India. Currently building product UI at Cube — a Sequoia Capital-backed AI startup helping SMBs automate marketing with AI.I've been shipping production interfaces with React and Next.js for 4+ years — across startups, agencies, and US-based clients. I also run a YouTube channel with 70+ tutorials where I break down real engineering problems, not toy examples. My StackCore: Next.js (App Router) · React 19 · TypeScript (Strict Mo

Buy Elite Yelp Reviews: Benefits, Risks & Best Strategies (2026)

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Halt and Catch Fire

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