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Hey dev community! 👋 As developers, our inboxes often turn into a graveyard of job alerts (LinkedIn, Indeed, ZipRecruiter) and tech newsletters we subscribe to with the intention of "reading later" but never actually open. The result? Important emails get lost, and we get the dreaded "Account storage is almost full" notification. Recently, I hit that wall. I had thousands of accumulated emails. While Gmail allows you to create filters for incoming mail, it doesn't have a native feature to say: "Delete this email automatically after 7 days" . So, I decided to solve it the way we solve everything: by writing some code. 🛠️ The Solution: Google Apps Script + JavaScript Since the Google Workspace ecosystem runs on a JavaScript-based environment, I put together a custom script. Fun fact: a simple loop originally failed due to Google's strict 6-minute execution limit. To fix this, I optimized the code to process emails in batches of 100 , preventing the server from timing out. Here is the final production-ready script: function cleanSpamTsunami() { // 1. Loop to delete ALL Job Board emails in batches of 100 var continueJobSearch = true; while (continueJobSearch) { var jobThreads = GmailApp.search('computrabajo OR indeed OR linkedin OR OCC OR neuvoo OR talent.com OR jooble', 0, 100); if (jobThreads.length > 0) { Logger.log('Deleting a batch of ' + jobThreads.length + ' job alert emails...'); GmailApp.moveThreadsToTrash(jobThreads); } else { Logger.log('No more job alerts found!'); continueJobSearch = false; // Break the loop } } // 2. Loop to delete old Newsletters (older than 7 days) in batches of 100 var continueNewsletters = true; while (continueNewsletters) { var newsletterThreads = GmailApp.search('unsubscribe OR "cancelar suscripción" older_than:7d', 0, 100); if (newsletterThreads.length > 0) { Logger.log('Deleting a batch of ' + newsletterThreads.length + ' old newsletters...'); GmailApp.moveThreadsToTrash(newsletterThreads); } else { Logger.log('No more old newslett

One universal AI agent sounds convenient. One agent to read tickets, write code, generate tests,...

There's a specific kind of bad documentation that I think we've all suffered through. You search for "what is a goroutine" or "how do database transactions work" and you get one of two things: either a six-page academic paper that assumes you already know the answer, or a tutorial so watered-down it covers nothing real. What you actually want is someone like that senior engineer at your company the one who, when you finally work up the nerve to ask a dumb question, sits down and actually explains the thing. Not just the what, but the why. Not just the happy path, but the part where you'll get confused at 2am and what to do about it. I've been building that resource. It's called The Missing Manual. Here's the pitch in one sentence: it's a free, growing library of developer guides written like advice from a battle-hardened friend who genuinely wants you to understand the thing, not just copy the code. Some examples of what's in there right now: Reading a Stack Trace at 2am — starts with "that wall of text is not an attack, it's a map," then teaches you the four-step method that works in Python, JavaScript, Java, or whatever you're using. Includes the site-packages/ vs your-own-code trick that turns 40-line traces into 2-line ones. Go From Zero - covers the basics, but also the deep stuff that most Go tutorials skip: what the GMP scheduler actually does, how escape analysis decides what lives on the heap, why goroutines are cheap in a way OS threads aren't. Mental-model-first, the whole way through. Docker Without the Magic - doesn't just show you docker run. Explains what a namespace and a cgroup actually are, so when Docker does something weird, you have somewhere to start. Why Is My Query Slow? - the real answer, including EXPLAIN, index cardinality, the N+1 problem, and what "using index" in a query plan actually means vs what you want it to mean. There are 160+ guides across debugging, databases, infrastructure, networking, APIs, AI/ML, performance, and programmin

Your domain event fires. Your notification service queries the DB for the entity that just got saved. It finds nothing. You add a log line. It starts working. You remove the log. It breaks again. That's not a race condition. That's @EventListener . What's actually happening Spring's @EventListener fires synchronously, inside the calling thread, before the transaction commits. The DB row exists in Hibernate's session — but it hasn't been flushed and committed yet. Other connections, including the one your listener opens when it calls findById , can't see it. The log statement "fixes" it because the delay gives Hibernate time to flush. Remove the log, the flush doesn't happen in time, and you're back to an empty Optional . Here's the broken setup: @Component public class OrderEventListener { @EventListener // fires MID-TRANSACTION, before commit public void onOrderCreated ( OrderCreatedEvent event ) { // Transaction not committed yet. // Other DB connections see nothing. Order order = orderRepository . findById ( event . getOrderId ()) . orElseThrow (); // ← throws here, row doesn't exist yet notificationService . notifyCustomer ( order ); } } The obvious fix and what it costs you Spring ships @TransactionalEventListener for exactly this. Set phase = TransactionPhase.AFTER_COMMIT and the listener fires after the transaction commits. The row is visible. findById returns the order. Problem solved. @Component public class OrderEventListener { @TransactionalEventListener ( phase = TransactionPhase . AFTER_COMMIT ) public void onOrderCreated ( OrderCreatedEvent event ) { // Transaction committed. All connections see the row. Order order = orderRepository . findById ( event . getOrderId ()) . orElseThrow (); // ← works fine notificationService . notifyCustomer ( order ); } } But the trade-off is real. Your listener is now decoupled from the transaction. If the listener fails — notification service is down, the email throws, the external API times out — the transaction alrea

If you're building AI agents that work with browser screenshots, you already know the pain. You take a full 1920×1080 screenshot, pass it to GPT-4o or Claude, and watch your token bill climb — while the model downscales the image anyway and blurs the exact text you needed it to read. There's a better way. The problem Vision LLMs are expensive for two reasons when you feed them full screenshots: Token cost — a full screenshot can cost 10–20x more tokens than a small crop Accuracy loss — models internally downscale large images, blurring fine text, labels, and UI elements But your agent already knows where to look. Browser automation tools like Playwright and Puppeteer give you getBoundingClientRect() — the exact pixel coordinates of any element on screen. So why are you sending the whole screenshot? The solution I built a stateless pay-per-use API that takes a screenshot and pixel coordinates, and returns just the cropped element as a lossless PNG — ready to pass directly to your vision LLM. POST /crop { "image" : "<base64 screenshot>" , "x" : 120 , "y" : 45 , "width" : 640 , "height" : 80 } Returns: { "success" : true , "data" : { "base64" : "iVBORw0KGgo..." , "mime" : "image/png" , "width" : 640 , "height" : 80 , "bytes" : 4821 } } A 4KB crop instead of a 2MB screenshot. Same information. 95% fewer tokens. How payment works Here's where it gets interesting. The API uses the x402 payment protocol — HTTP's long-dormant 402 Payment Required status code, finally put to use. There are no API keys. No accounts. No subscriptions. The agent pays $0.0005 USDC per crop on Base L2 automatically. The flow: 1. Agent POSTs to /crop (no payment header) ← 402 with payment instructions in headers 2. Agent transfers 0.0005 USDC to recipient wallet on Base (near-zero gas, ~2 second settlement) 3. Agent POSTs again with x-payment-tx-hash header ← 200 with cropped PNG The entire exchange happens inside the HTTP request cycle. No human intervention. No billing dashboard. The money lands

The Internet of Things is now a phrase you see on product boxes, in boardroom slide decks, and across thesis titles in engineering departments everywhere. But it has a surprisingly precise origin. The term was coined in 1999 by a British technologist named Kevin Ashton, and it was not born in a research lab or an academic paper. It started its life as the title of a corporate sales presentation. A slide deck, not a laboratory In the late 1990s Ashton was a brand manager at Procter & Gamble, the consumer goods giant behind products you would find on any supermarket shelf. He was wrestling with a mundane but expensive problem: store shelves kept running out of a particular shade of lipstick, even though the warehouse had plenty in stock. The supply chain simply had no reliable way to know, in real time, what was where. Ashton's proposed fix was radio-frequency identification, or RFID: tiny tags that could be attached to products and read automatically by sensors, with no human scanning each item by hand. The vision was that physical objects could report their own location and status, feeding that data up into computer systems without anyone typing it in. To sell this idea to executives, he needed a title that would make supply-chain tagging sound as exciting as the technology dominating headlines at the time. So he linked his RFID proposal to the hottest topic of 1999 and called the presentation "Internet of Things." By his own account, years later in RFID Journal, the choice was deliberate. Tying tags and sensors to the red-hot word "internet" was the surest way to get senior people in the room to pay attention. The pitch worked well enough that the phrase stuck, and Ashton went on to help found the Auto-ID Center at MIT, a research group that did much of the early standards work that made networked RFID practical. Why the name was actually a good description It would be easy to dismiss the term as a marketing flourish, but it captured something real. Ashton's point

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Introduction With the World Cup 2026 group stage reaching its climax, football fans worldwide are speculating about who will make it to the finals. To make this experience interactive, I built a fully dynamic World Cup 2026 Bracket Simulator. Instead of just letting users click and choose winners, this app dynamically calculates ELO win probabilities and probabilistically generates realistic match scores (including extra time and penalties) based on team ratings. It also syncs with live match data in real-time. Live URL: https://worldcup-predict2026.github.io/champion/ Tech Stack: Vanilla JS, CSS3 (3D parallax), GitHub Actions, Python, football-data.org API Core Features & Technical Implementation ELO-Based Win Probability & Score Simulation Each team in the database is assigned an ELO-based strength rating. When a user runs the AI auto-prediction, the script calculates win probability and generates a realistic scoreline. Here is the goal roll algorithm (Poisson-like simulation) implemented in Vanilla JS: javascript function generateMatchScore(team1, team2, winner) { if (team1 === "TBD" || team2 === "TBD" || !winner) return null; const s1 = teamStrengths[team1] || 70; const s2 = teamStrengths[team2] || 70; const winnerIsTeam1 = (winner === team1); const strengthDiff = Math.abs(s1 - s2); const baseGoalExpected = 1.1; const bonusGoal = Math.min(1.8, strengthDiff / 12.0); // Goal weight based on ELO difference const rollGoals = (lambda) => { let L = Math.exp(-lambda); let k = 0; let p = 1.0; do { k++; p *= Math.random(); } while (p > L && k < 10); return k - 1; }; let gWin = 0; let gLose = 0; const r = Math.random(); if (r < 0.75) { // Regular time win (90 mins) gLose = rollGoals(baseGoalExpected); gWin = gLose + 1 + rollGoals(0.7 + bonusGoal); return winnerIsTeam1 ? ${gWin} - ${gLose} : ${gLose} - ${gWin} ; } else if (r < 0.92) { // Extra time win (AET) const normalGoals = rollGoals(baseGoalExpected); gLose = normalGoals; gWin = normalGoals + 1; return winnerIsTeam1 ?

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A quiet experiment in Bluetooth, offline communication, and why we gave up too much when we handed our conversations to the cloud. The last time I was truly unreachable, I was in a place with no cell signal and no Wi-Fi. And I realized something strange: I had no way to send a message to the person sitting three feet away from me — because every app on my phone needed the internet to do it. That felt wrong. We've built the most sophisticated communication technology in human history, and somehow it all routes through a handful of servers in Northern Virginia before reaching someone in the same room. So I built Bluetoosh. The Premise: What If the Network Was Just… You and Me? Bluetoosh is a peer-to-peer messenger that runs entirely over Bluetooth. No internet. No servers. No accounts. No cloud storage. Just two devices, talking to each other the way devices were always capable of doing — directly. You open the app. You see who's nearby. You start a conversation. That's it. No phone number required. No email verification. No terms of service asking you to agree that your metadata might be used for advertising. The only network involved is the six feet of air between you and the other person. Why Bluetooth? Bluetooth is one of the most underrated communication protocols we carry around every day. Your phone already has it. Your laptop has it. Most people use it for headphones and nothing else. But Bluetooth is capable of much more. It can discover nearby devices, establish encrypted connections, and transfer data — all without touching the internet. The range is roughly 10–30 meters in open space. That covers a room, a floor, a campsite. Bluetoosh uses both BLE (Bluetooth Low Energy) and Classic Bluetooth, plus Google Nearby Connections for mesh-style discovery. In practice, this means you can find people around you, chat, share files, and even make voice calls — all completely offline. What It Actually Does Here's what surprised me most while building this: offline co

Recently, we encountered a case on a RHEL 9 machine where an RPM query did not show any information about installed package even though the package files were present in the filesystem. Although RPM reported that the package was not installed, I was still able to run tcpdumpcommand and use it without any issues. The binary was present there in the filesystem and I was able to run it successfully. Fixing RPM Database Desynchronization on RHEL - bidhankhatri.com.np Recently, we encountered a case on a RHEL 9 machine where an RPM query did not show any information about installed package even though the package files were present in the filesystem. bidhankhatri.com.np

A critique published in Nature Wednesday calls the basic technology behind Microsoft's "breakthrough" quantum computing chip the Majorana 1 into question. Microsoft unveiled the chip in February 2025 and said it featured a brand-new technology known as a topological qubit. Topological qubits, they said, would be the "building blocks" for their future quantum computer. Microsoft […]

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