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Types of loops in JS
Programming is all about solving problems efficiently. Two concepts that play a major role in writing reusable and efficient programs are loops and functions . Loops help us perform repetitive tasks without writing the same code again and again, whereas functions help us organize code into reusable blocks. Let's understand these concepts in detail. Why Do We Need Loops? Suppose we want to print "Hello" five times. Without loops, we would write: console . log ( " Hello " ); console . log ( " Hello " ); console . log ( " Hello " ); console . log ( " Hello " ); console . log ( " Hello " ); Although this works, it violates one of the fundamental principles of programming: Don't Repeat Yourself (DRY) Repeating code: Increases the number of lines. Makes maintenance difficult. Introduces more chances for errors. Loops solve this problem by allowing us to execute the same block of code multiple times. Types of Loops in JavaScript JavaScript provides three looping statements: Loop Type Category while Entry-Check Loop for Entry-Check Loop do...while Exit-Check Loop Entry-Check Loop / Entry-Controlled Loop In entry-Check loops, the condition is checked before executing the loop body. If the condition is false initially, the loop body never executes. Examples: while loop for loop Exit-Check Loop / Exit-Controlled Loop In an exit-Check loop, the loop body executes first and then checks the condition. Therefore, the body executes at least once. Example: do...while loop Components of Every Loop Every loop generally consists of three parts: 1. Initialization Determines where the loop starts. let i = 1 ; 2. Condition Determines whether the loop should continue executing. i <= 5 3. Increment or Decrement Updates the loop variable after each iteration. i ++ ; or i -- ; 1. while Loop The while loop repeatedly executes a block of code as long as the condition remains true. Syntax while ( condition ) { // statements } Example: Print Numbers from 1 to 5 let i = 1 ; while ( i <= 5 ) { cons
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I built a free extension to track Claude's usage limits before you hit them
If you use Claude daily, you've probably hit a wall mid-task. The reason it's so easy: Claude doesn't have one limit. It has several. A rolling 5-hour session window A weekly pool shared by all models Separate weekly caps per model (Opus, Sonnet, Claude Design) And the weekly pool is sneaky: Fable has no cap of its own and draws that shared pool down ~2× faster than Opus . So you can burn the week without realizing it. I wanted that state visible at a glance instead of digging through settings, so I built Claude Usage Monitor — a small browser extension for Chrome and Firefox. What it does It puts a color-coded % badge in your toolbar , and one click shows the full breakdown: Current 5-hour session + live countdown to reset Weekly all-models pool (with the Fable draw-down flagged on the card) Per-model weekly caps: Opus, Sonnet, Claude Design Daily Claude Code routine runs Extra-usage credits + prepaid balance for pay-as-you-go Auto-detects your plan (Pro / Max 5x / Max 20x / Team), so every number matches your subscription Six themes The privacy part (the part I cared about most) It's open source (MIT) and runs 100% locally — no backend, no analytics, no servers. A design decision I'm happy with: the host permissions are scoped to exactly four claude.ai endpoints (org list, usage stats, routine-run budget, prepaid balance). It physically can't read your chats, projects or files. Narrow permissions = less to trust, and less to exploit. One honest caveat: it reads claude.ai's own usage endpoints, so it can break if Anthropic changes them. Not affiliated with Anthropic. Try it It's free, no account needed (desktop Chrome & Firefox): 🔗 claude-monitor.com Chrome Web Store Firefox Add-ons Happy to hear what else you'd want tracked — drop a comment.
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I shipped my first iOS app in 30 days for $300. Here's the build log.
I take a lot of screenshots. The article I'll read later. The recipe I'll cook on Sunday. The movie name from someone's Instagram story. A job post, a product, a tender. Most of them die in my camera roll. So I built Chista — an iOS app that auto-imports every screenshot, classifies it with AI (Article, Product, Event, Reference, Media), and surfaces a one-tap action: Buy on Amazon , Add to Calendar , Reserve on OpenTable , etc. It shipped on the App Store thirty days after I started, for about $300 in total cost. The interesting part wasn't the app. It was what the build revealed. What I built Chista is a native iOS app + Python backend. iOS reads new screenshots in the background via PHPhotoLibraryChangeObserver , scoped to PHAssetMediaSubtype.photoScreenshot (so it literally can't see your other photos). Each new screenshot gets OCR'd on-device with Apple Vision , then the image + OCR text get POSTed to the backend. Backend sends the pair to OpenAI GPT-4o with a structured prompt that returns a CategorizationResult JSON: category, subtype, title, suggested action, extracted data (price, deadline, URL, etc.). Result gets persisted and pushed back to the inbox via Supabase real-time. That's the whole thing. The "magic moment" is just: you screenshot something, switch to Chista a few seconds later, it's already sorted with a contextual action button. Stack Layer Tool Why iOS app Swift 5.10, SwiftUI, StoreKit 2 iOS 17+, modern surface Backend FastAPI on Railway One-file ergonomics, fast cold starts Database + Auth Supabase Postgres + JWT auth out of the box AI OpenAI GPT-4o (Pro), gpt-4o-mini (Free) Tier-routed at categorization time Push APNs via aioapns Direct, no Firebase middleman Subscriptions StoreKit 2 + app-store-server-library Server-side JWS verification Affiliate routing Custom matrix in Supabase tables Amazon Associates wired, more pending Hosting (web) Cloudflare Pages Free, fast, never goes down No frameworks I wouldn't reach for again. What it cost Lin
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JSONata Explained: Query and Transform JSON Without the Boilerplate
Working with complex JSON payloads can quickly become a nightmare. You end up chaining .map() , .filter() , and .reduce() calls across multiple lines just to pull out a few nested values. Add optional chaining to avoid crashes and the code becomes nearly unreadable. There is a cleaner way - JSONata . It is a compact, purpose-built query and transformation language for JSON data. Think of it as XPath for XML, but designed from the ground up to work with JSON objects and arrays. What is JSONata? JSONata is an open-source project originally created by Andrew Coleman at IBM. It gives developers a declarative syntax to extract and reshape JSON data without writing procedural JavaScript loops. Where vanilla JS might take 15 lines, a JSONata expression often takes one. It is available as an npm package and integrates naturally into Node.js and TypeScript projects. Simple Path Navigation The foundation of JSONata is its dot-notation path traversal. Given a nested JSON object, you simply trace the path to the value you need: customer.address.city This returns the city value without any need for null checks or defensive coding. JSONata handles missing properties gracefully by returning undefined rather than throwing errors. Automatic Array Mapping When JSONata encounters an array during path traversal, it automatically maps across all items. There is no need to write an explicit .map() call: customer.orders.product This returns an array of all product names from every order in one clean expression. Inline Filtering You can filter arrays directly using bracket notation with a condition: customer.orders[price > 1000].product This returns only the products from orders where the price exceeds 1000. No .filter() callback required. Built-in Aggregation Functions JSONata ships with a solid set of built-in functions for math, strings, and arrays. Aggregating a set of values is straightforward: $sum(customer.orders.price) Other useful functions include $count() , $average() , $string(
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My analysis engine has two brains now
The thing I'm building, App Store Analyzer, is a website that does one thing: it reads an iOS niche and writes a deep market analysis for indie devs. For a long time that analysis had one brain — and it spoke German. That made sense at the start. German is my home market and my own language, so I built the analysis logic in German first. I could actually feel whether the output was good or garbage, section by section, because I was reading it in the language I think in. It got deep. Reliable. I trusted it. Then it started to hurt. Every time I wanted the analysis in another language, I was basically running the whole expensive thinking step again from scratch. German code, German slugs, German routes, German everything — and a goal of serving 14 languages. The whole thing fought itself. So I rebuilt the brain in English. Not "translated the code" — rebuilt the canonical brain so English is the one source of truth. Now the engine thinks once in native English, and that single analysis gets translated and cached into 13 other languages . Generate once, translate many. It was not a clean ride. The lows. A refactor left a pile of undefined names and quietly 500'd my detail pages — live, in production, while I thought everything was fine. I misread a normal cache warm-up window as a dead backend more than once and "fixed" things that were never broken. I spent an embarrassing stretch hammering an endpoint with a wrong key, watching 403 scroll by, before realizing my terminal had eaten the line that set the key. Small things. Hours each. The highs. Two of them I didn't expect: It got cheaper , not just cleaner. I'm not paying for a full deep analysis per language anymore — one real generation, then lightweight translations. For a solo dev watching every API cent, that's the whole game. And the English brain was actually sharper . I ran the old German output against the new English one side by side, fully expecting English to be the weaker copy. It wasn't. In a few section
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From Confused to Confident: How I Finally Mastered GitHub Copilot in Every Situation
From Confused to Confident: How I Finally Mastered GitHub Copilot in Every Situation I still remember the afternoon I rage-closed VS Code because Copilot kept suggesting the wrong function signatures — again . I had been treating it like a magic oracle, typing vague comments and expecting perfect code to rain down from the AI heavens. Spoiler: that's not how it works. After weeks of trial, error, and a few embarrassing pull request reviews, I cracked the code (pun intended). Here's everything I wish someone had told me about using GitHub Copilot accurately — across Chat , Plan , and Agent modes. 🧠 First, Understand What Copilot Actually Is Before diving into tips, let's reset expectations. GitHub Copilot is not a search engine. It's not Stack Overflow with a fancy UI. It's a context-aware AI assistant trained on massive amounts of code. That means: The quality of your output depends directly on the quality of your input . It works best when it has rich context — open files, good comments, clear naming. It can be wrong. Confidently wrong. Always review what it generates. With that mindset locked in, let's explore each mode. 💬 Copilot Chat: Your Pair Programmer in the Sidebar The first time I opened Copilot Chat, I typed: "fix my code." It stared back at me, basically confused. Of course it was — I hadn't told it which code, what was broken, or what I expected. Tips for Accurate Chat Usage 1. Be specific and contextual. Instead of: "Why isn't this working?" Try: "This useEffect hook in React runs on every render instead of only when userId changes. Here's the code: [paste snippet]. What's wrong?" The more context you give, the more surgical the answer. 2. Use slash commands to guide intent. Copilot Chat supports built-in commands that dramatically improve accuracy: /explain → Explains selected code in plain English /fix → Suggests a fix for a highlighted bug /tests → Generates unit tests for selected code /doc → Writes documentation for a function or class These aren'
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Week 2: Pull Requests, Rejected Code, and the Art of Not Breaking Things
GSoC 2026 | CircuitVerse × Canvas LMS LTI 1.3 Integration If Week 1 was about getting familiar with the codebase and understanding what needed to be built, Week 2 was about learning the hard way that writing code is only half the job. The other half — the messier, more humbling half — is getting that code accepted by the people who actually maintain the project. This week was full of detours, rejected pull requests, reviewer feedback that stung a little, and a surprisingly frustrating fight with a two-letter word in Ruby. But by the end of it, I had something real to show: a clean, reviewed, and submitted change to CircuitVerse that lays the foundation for the entire LTI 1.3 integration. Let me walk you through it. A Quick Refresher: What Are We Building? CircuitVerse is an open-source platform where students can build and simulate digital circuits right in their browser. The project I'm working on aims to connect CircuitVerse with Canvas, one of the most widely used Learning Management Systems (LMS) in universities around the world. The technology that makes this connection possible is called LTI — Learning Tools Interoperability. Think of it as a universal plug that lets any educational tool (like CircuitVerse) slot into any LMS (like Canvas) so that students can log in once, get assignments, submit work, and have their grades flow back automatically — all without leaving their course page. There are two versions of this plug: LTI 1.1 , which is old and uses a simpler (but outdated) security mechanism, and LTI 1.3 , which is newer, more secure, and what Canvas actually recommends today. My job is to bring CircuitVerse fully up to LTI 1.3 standards. Monday–Tuesday: A Pull Request That Taught Me to Read Diffs I started the week with what I thought was a solid pull request (PR) — a fix for a bug in CircuitVerse's existing LTI 1.1 grade passback feature. "Grade passback" is the process where CircuitVerse sends a student's score back to Canvas after they complete an as
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How a PHP SDK Can Save You Hundreds of Lines of API Integration Code
How a PHP SDK Can Save You Hundreds of Lines of API Integration Code Most APIs provide documentation, examples, and maybe even a Postman collection. That's usually enough to get started. But once your application grows, you'll quickly discover that working directly with HTTP requests introduces a surprising amount of repetitive code. You end up writing the same things over and over: Authentication headers Request serialization Response parsing Error handling Pagination logic DTO mapping This is exactly why SDKs exist. In this article, we'll look at how a PHP SDK can simplify API integrations and reduce maintenance costs over time. The Hidden Cost of Direct API Calls Let's imagine you're integrating a URL shortening API. A typical implementation might look like this: $client = new GuzzleHttp\Client (); $response = $client -> post ( 'https://example.com/api/links' , [ 'headers' => [ 'X-Api-Key' => $apiKey , 'Content-Type' => 'application/json' , ], 'json' => [ 'url' => 'https://example.com' ] ] ); $data = json_decode ( $response -> getBody () -> getContents (), true ); This doesn't seem bad. Now repeat it for: Create link Update link Delete link Get link List links Create group Update group Get profile Eventually your codebase becomes filled with API boilerplate. The business logic becomes harder to see because it's buried under HTTP implementation details. What a Good SDK Does A well-designed SDK abstracts repetitive tasks and exposes a clean programming interface. Instead of dealing with HTTP requests directly, developers work with resources and objects. For example: $link = $client -> links () -> create ([ 'url' => 'https://example.com' ]); This is easier to read and easier to maintain. The SDK becomes responsible for: Authentication Request building Validation Serialization Response mapping Exception handling Consistent Error Handling One common problem with raw API integrations is inconsistent error handling. Without an SDK, every request may need its own validat
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Why Most Sports Betting Projects Fail Before Launch (And It's Not the Algorithm)
If you've ever tried building a sports betting application, odds tracker, arbitrage scanner, value betting tool, or sports analytics dashboard, you've probably experienced the same thing: You start with the exciting part. The idea. The algorithm. The UI. The business logic. And then reality hits. The Hidden Problem Nobody Talks About Most developers assume the hardest part of a betting-related project is the prediction model or arbitrage logic. In practice, the real challenge is data infrastructure. Before your project can calculate anything, you need: Live events Accurate odds Multiple bookmakers Consistent market structures Historical updates Reliable refresh rates And suddenly your "weekend project" turns into a full-time data engineering job. The Scraping Trap Most developers begin by scraping bookmaker websites. At first it seems simple: Open DevTools Find the API request Parse the response Save the data Done, right? Not quite. Within a few weeks you'll likely encounter: Changed endpoints Rate limits Cloudflare protection Different JSON formats Missing markets Broken parsers Increased maintenance costs Instead of improving your product, you're fixing scrapers. Again. And again. And again. Every Bookmaker Speaks a Different Language Let's say you want to compare odds from five sportsbooks. You quickly discover that every provider structures data differently. One bookmaker might return: { "home" : "Liverpool" , "away" : "Arsenal" } Another might return: { "team1" : "Liverpool" , "team2" : "Arsenal" } A third one could use: { "participants" : [ "Liverpool" , "Arsenal" ] } Now multiply that problem across: dozens of bookmakers hundreds of leagues thousands of events You end up spending more time normalizing data than building features. Real-Time Data Changes Everything Many projects work perfectly during testing. Then live data arrives. Odds can move multiple times within a minute. If your system refreshes too slowly: arbitrage opportunities disappear alerts become
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I Spent 30 Days Building a Complete Node.js Learning Path (Free for Everyone)
What This Repository Is A complete, structured, beginner-friendly Node.js learning path. 30 sessions. Each session has Clear learning objectives Step-by-step explanations Working code examples Practice exercises Interview questions Summary of key points No fluff. No assumptions. Just code. The Complete Curriculum Phase 1 - Node.js Fundamentals (Sessions 1-5) Session Topic What You Will Build 01 Introduction to Node.js Your first Node.js program 02 Project Setup and npm package.json, node_modules 03 How Node.js Works Event loop, blocking vs non-blocking 04 Modules and Imports Your first custom module 05 File System Module Read, write, update, delete files Sample code from Session 05 const fs = require ( " fs " ); // Create a file fs . writeFileSync ( " student.txt " , " Welcome To Node.js " ); // Read the file const data = fs . readFileSync ( " student.txt " , " utf8 " ); console . log ( data ); // Welcome To Node.js // Append to file fs . appendFileSync ( " student.txt " , " \n New line added " ); // Delete file fs . unlinkSync ( " student.txt " ); Phase 2 - Core Modules (Sessions 6-10) Session Topic What You Will Build 06 Path Module Cross-platform file paths 07 OS Module System information 08 Events and EventEmitter Custom event handling 09 HTTP Module Create a server 10 Multi-Route Server Multiple routes, JSON responses Sample code from Session 10 const http = require ( " http " ); const server = http . createServer (( req , res ) => { if ( req . url === " / " ) { res . end ( " Home Page " ); } else if ( req . url === " /about " ) { res . end ( " About Page " ); } else if ( req . url === " /products " ) { res . setHeader ( " Content-Type " , " application/json " ); res . end ( JSON . stringify ([{ id : 1 , name : " Laptop " }])); } else { res . statusCode = 404 ; res . end ( " Page Not Found " ); } }); server . listen ( 3000 ); Phase 3 - Building REST APIs (Sessions 11-15) Session Topic What You Will Build 11 CRUD with Dummy Data Complete REST API using array 12
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Reading a Paginated API Without Holding the Whole Thing in Memory
Your API hands out 50 records at a time across 400 pages. You need all of them. You do not need them all at once. Here's a very familiar situation that shows up constantly on the backend. Some API returns data in pages, 50 or 100 records at a time, and you need to walk every page: sync them to your database, export them to a file, run a report. The endpoint gives you a cursor or a page number and you keep asking until there's nothing left. The way most of us write it the first time looks like this: async function getAllRecords () { const all = []; let cursor = 0 ; while ( cursor !== null ) { const { records , nextCursor } = await fetchPage ( cursor ); all . push (... records ); cursor = nextCursor ; } return all ; } const everything = await getAllRecords (); for ( const record of everything ) { process ( record ); } It works. At four hundred records it's fine. The trouble starts when the dataset grows, and it has three separate problems hiding in it. It holds the entire dataset in memory before you touch a single record. It's all or nothing: if page 380 fails, you've thrown away the 19,000 records you already fetched . And it's eager. You can't start processing record one until the very last page has landed , even if all you wanted was the first ten. There's a shape in JavaScript built for exactly this, and if you read the first two posts in this series you already have both halves of it. Two ideas you've already seen In the CSV post , we pulled rows out of a huge file one at a time with a generator, so the file never fully loaded into memory. Lazy. Pull-based. You ask for the next row, you get the next row, nothing more. In the async/await post , we saw that a generator can pause at a yield and resume later.A generator can hold its place across an asynchronous gap. Put those together. A generator that pulls data lazily, and can pause to await something between pulls. That's an async generator, and it's the natural tool for walking a paginated API. You pull records
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How I Built My Indie AI Stack — A Practical Guide for 2026
How I Built My Indie AI Stack — A Practical Guide for 2026 A few months ago I hit a wall. I was bootstrapping a side project, burning through API credits way faster than my wallet could handle, and honestly questioning whether shipping a product as a solo dev in 2026 was even realistic anymore. The big-name providers were charging me an arm and a leg, and I kept reading about indie hackers who somehow made it work. So I went down a rabbit hole — tested dozens of models, tracked every dollar, and built what I now call my "indie AI stack." Let me show you exactly what I landed on, why it works, and how you can copy it. Why This Stack Exists (And Why I Almost Gave Up) Here's the thing nobody tells you when you're starting out: the default path — just throwing GPT-4o at everything — will quietly drain your runway. When you're an indie dev, every cent matters. I remember watching my first invoice roll in and doing actual math on whether I could sustain this for six months. The answer was no. So I started experimenting. I tested 184 different AI models (yes, really) through Global API, ran them against real workloads from my product, and started measuring not just quality but cost-per-useful-output. That's the metric that actually matters. The result? I landed on a stack that delivers 40-65% cost reduction versus just slamming GPT-4o on every request. Quality stayed comparable — sometimes better. Average latency sits at around 1.2 seconds with 320 tokens per second throughput. And the whole setup took me under 10 minutes. Let me walk you through it. The Models That Actually Made The Cut After weeks of testing, I narrowed my shortlist down to five models that form the backbone of my indie stack. Here's the pricing breakdown I'm working with today: DeepSeek V4 Flash — $0.27 input / $1.10 output, 128K context DeepSeek V4 Pro — $0.55 input / $2.20 output, 200K context Qwen3-32B — $0.30 input / $1.20 output, 32K context GLM-4 Plus — $0.20 input / $0.80 output, 128K context GPT
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Beyond the Happy Path: Lessons in Resilience and Distributed State
Reflecting on two major technical challenges from my backend engineering internship, focusing on fault tolerance, infrastructure, and distributed architectures. Introduction As I wrap up my HNG internship, I’ve been reflecting on the gap between code that "works on my machine" and code that survives in production. Here is a look at two tasks from Stage 9—one solo, one team-based—that completely changed how I approach backend engineering and infrastructure. The Individual Task: Background Job Scheduler What it was For my individual Stage 9 task, I built a distributed background job scheduler backed by PostgreSQL and a FastAPI backend, featuring a vanilla HTML/CSS/JS frontend. It manages async tasks (like a mock email sending queue) using a MinHeap priority queue, Directed Acyclic Graph (DAG) dependency resolution, a Dead-Letter Queue (DLQ), and a real-time Server-Sent Events (SSE) dashboard. The problem it was solving Heavy asynchronous tasks—like email generation or batch processing—cannot block the main API thread. The system needed to successfully queue, prioritize, retry on failure, and track every job entirely independently from the standard request-response cycle. How I approached it I built the core logic from the ground up: a MinHeap and an alternative Timing Wheel algorithm for scheduling, a worker engine featuring a 3-attempt backoff sequence (1s, 5s, 25s with jitter), a DAG dependency checker, and a starvation daemon to prevent tasks from hanging. Once the CRUD API and SSE streaming were hooked up, I containerized the entire application with Docker and wrote my deploy scripts. I thought I was done. What actually broke and how I fixed it The application code took hours. The deployment took a full day of non-stop debugging across multiple cloud providers. Oracle Cloud was out of capacity on every free tier shape, and GCP demanded upfront payment. I finally got a t3.micro running on AWS, but that’s when the real DevOps nightmare began: The SSL Chicken-and-Egg
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What Happened When I Told Codex to Calm Down
I have been doing a lot of work lately tightening up my diagnostic suite: the mechanics, the workflow, the way it runs against target repos, the way it helps narrow a repair instead of letting everything turn into a fog machine. And because I work with Codex as my coding agent, I have also become very familiar with a specific kind of AI-agent behavior. The “I am helping so hard I am about to make this worse” behavior. If you work with coding agents, you probably know the vibe. You ask for one thing. The agent does that thing. Then it also adjusts a helper. Then it updates a fixture. Then it “notices” a nearby pattern. Then it starts explaining three other improvements you never asked for. And now you’re staring at the diff like: “Why are you in that file?” “I did not tell you to touch that.” “That was not the repair lane.” “Please stop being useful for one second.” I am not proud of how many times I have verbally threatened a language model. But here we are. The funny thing is, I am building Scarab partly because I already expect this kind of drift. I know that when an AI coding agent is given too much uncertainty, it tries to solve the uncertainty itself. Sometimes that is useful. Sometimes it is a raccoon with a soldering iron. The challenge is that while I am developing the diagnostic system, I cannot always use the diagnostic system to supervise itself. So there are moments where I have to manually hold the line. That means a lot of conversations with Codex that sound like: “Do not widen the patch.” “Do not change the diagnostic output to make the diagnostic pass.” “Do not fix the test by changing what the test means.” “Do not touch SDS mechanics while repairing the target repo.” “Stay in the target.” “Stay in the lane.” “Why are you like this?” Very normal. Very calm. Very professional. Then something changed At some point, after a lot of tightening, the workflow started to feel different. Scarab had enough of the diagnostic work under control that I could tell
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An Itty Bitty Aster Plotter problem...
Eight years ago (a geological epoch or two ago in Internet terms) Nicholas Jitkoff released itty.bitty.site - a website which could render whole websites just based on what was in the link, something like: itty.bitty.site?SOMEBASE64ENCODEDVALUE== et voilà! Free web-hosting if you could make it fit ;) At the time, I was rather obsessed with qr-codes thanks to developing QRGoPass and was working with aster plots a lot, so I developed an app that could fit into a qr-code! Today itty.bitty.site no longer exists so I can't do that any more... But I did make it 80% smaller without "cheating" and using modern CSS instead of d3.js ;)
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I built a document converter that never uploads your files
Every time you use an online PDF converter, your file travels to a server somewhere — processed by a company you don't know, stored temporarily on hardware you don't control. For a random meme? Fine. For a payslip, a contract, or a medical document? That's a real privacy problem. What I built ConvertiZen is a document converter that runs 100% in the browser using WebAssembly and modern JS APIs. Your file never leaves your device. Ever. Verify it yourself: open DevTools > Network tab > run a conversion. Zero outgoing requests containing your file data. What it supports 40+ format pairs: PDF ↔ Word, JPG, PNG, Text, HTML, Markdown Excel ↔ CSV, JSON, HTML Images: JPG ↔ PNG ↔ WebP, GIF/BMP → PDF JSON ↔ CSV, Markdown ↔ HTML, XML → JSON How it works PDF.js for PDF parsing docx library for Word generation SheetJS for Excel/CSV Canvas API for image conversions Everything client-side — no server required Pricing 3 free conversions/day, no account needed. Beyond that: €0.69/conversion, €4.99 for a pack of 10, or €4.99/month for unlimited Premium. Feedback welcome What formats are missing? What would make you trust a browser-based tool over a server-based one? 👉 https://convertizen.netlify.app
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I Pointed a Skill Linter at a 52k-Star Repo. Here Is What 84/100 Looks Like.
Every AI agent skill you write burns context on every turn. Not just when the skill is running. On every turn. The agent keeps each skill's name and description loaded permanently so it knows when to invoke them. A vague description is not just a documentation problem. It is a tax you pay per message, forever. That is the problem I built skillscore to catch. When addyosmani/agent-skills hit 52,000 stars and went to #1 trending on GitHub, I had my benchmark. 24 production-grade skills written by people who clearly know what they are doing. If a static linter has anything useful to say at this level, this is where to find out. So I ran it. One command. 24 skills. Two seconds. This is what skillscore 0.2.0 can do now: skillscore /path/to/agent-skills/ One command scores everything in the tree. Here is the output: Three skills from addyosmani/agent-skills scored in one command, then a drill-down into the lowest scorer. The full results Skill Score Grade spec-driven-development 91 A browser-testing-with-devtools 91 A deprecation-and-migration 91 A frontend-ui-engineering 91 A test-driven-development 88 B code-review-and-quality 88 B interview-me 86 B ci-cd-and-automation 85 B code-simplification 85 B context-engineering 85 B documentation-and-adrs 85 B incremental-implementation 85 B security-and-hardening 85 B shipping-and-launch 85 B source-driven-development 85 B using-agent-skills 85 B doubt-driven-development 80 B observability-and-instrumentation 80 B planning-and-task-breakdown 80 B api-and-interface-design 78 C debugging-and-error-recovery 77 C git-workflow-and-versioning 77 C idea-refine 77 C performance-optimization 77 C Average: 84/100 (B) To be clear: 84 across 24 production skills is excellent. No failures. No D grades. Most skill libraries I have tested do not get close to this. The instruction content inside these skills is genuinely good. What the linter found is at the edges, not in the core. Two gaps. Five skills. Every single C. I drilled into all five
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How to Convert Word to PDF in the Browser with Vue 3, mammoth, and html2pdf.js
Converting Word documents to PDFs on the server is the classic approach: upload the file, run LibreOffice or a cloud API, send the result back. But that means your users’ resumes, contracts, and reports touch your infrastructure. I wanted something simpler for en.sotool.top : pick a .docx file in the browser, preview the parsed content, and download a PDF. No server involved. Here is how I built it with Vue 3, mammoth , and html2pdf.js . Why Client-Side? The main reason is privacy. Resumes, contracts, tax documents — users do not want them on a stranger’s server. Client-side conversion also means: No upload bandwidth limits No file size caps from your server No storage to clean up Works offline after the page loads The trade-off is that very complex documents are limited by the browser’s rendering capabilities. For typical office documents, that is fine. The Stack Vue 3 — UI, file handling, and reactive state mammoth — Parse .docx files into clean HTML html2pdf.js — Render the HTML into a PDF using html2canvas + jsPDF Native File API — File selection npm install mammoth html2pdf.js Loading the Word Document The first step is reading the uploaded .docx file into an ArrayBuffer , then converting it to HTML with mammoth . import mammoth from ' mammoth ' ; async function convertDocxToHtml ( file ) { const arrayBuffer = await file . arrayBuffer (); const result = await mammoth . convertToHtml ({ arrayBuffer }); return result . value ; } mammoth intentionally produces simple, clean HTML. It ignores complex formatting like text boxes and embedded fonts, which makes the output predictable. I keep the HTML in a reactive ref and render it in a preview panel: < template > <div ref= "previewRef" class= "word-preview" v-html= "htmlContent" ></div> </ template > < script setup > import { ref } from ' vue ' ; const htmlContent = ref ( '' ); const previewRef = ref ( null ); </ script > Generating the PDF Once the user is happy with the preview, html2pdf.js turns the preview element
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AI - The Stock Market Hype and the Dangers of Sloppy Code
At this time, AI is still a business that largely survives on valuation rather than profitability. The narrative surrounding artificial intelligence is driven as much — if not more — by financial speculation as by technological progress. This makes the twin narrative of an “AI infrastructure boom” essential. Ed Zitron has become well known for challenging this story. In reality, such an infrastructure boom is difficult to sustain when the underlying economics remain deeply unprofitable. Now, let us take a moment to reflect on the danger of relying — for our businesses, and worse, for our civilization — on a bubble that could burst at any moment, much like the dot-com bubble. Entire industries are restructuring themselves around assumptions that may ultimately prove irrational, even disastrous. The illusion and danger of replacing engineers There is a dangerous idea circulating in the world, born from the union of greed and ignorance: that software engineers have become obsolete. We no longer need them! Of course, someone who does not know how to write code cannot evaluate code quality. For such a person, any piece of code that works is just as good as any other piece of code that also works. They may see a functional demo and hastily conclude that AI can entirely replace software developers. An _experienced _engineer sees something different: brittle architecture, code with absurd or duplicated logic, security flaws, poor maintainability, and code that often collapses under real-world complexity. To the untrained eye, AI-generated code frequently looks convincing, while it may host invisible vectors of disaster. Hallucinations in software development are not harmless mistakes; they can become production bugs, security vulnerabilities, and eventually catastrophic business failures. The problem is not that AI writes code. The problem is that we seem to be heading toward an era in which we no longer fully understand the code powering our civilization. And because of th
AI 资讯
AI should do the implementation. You should own the decisions.
The default for AI-assisted development is one of two failure modes. Either you're babysitting the agent line by line — approving each diff, re-explaining context it dropped three messages ago — or you've handed it the wheel and you're hoping the PR that lands at the end resembles what you asked for. Son of Anton is neither. It's a delivery orchestrator built on a single claim: there are exactly three moments where a developer's judgment is irreplaceable. The orchestrator owns everything in between. The three gates Every project moves through three human decision points. Nothing important happens without you signing off. Gate 01 — Approve the WHAT ( /soa plan ) A grill-me session forces the AI to surface its assumptions, constraints, and scope decisions back to you before a single ticket exists. You say yes or you refine. It does not proceed until you have. Gate 02 — Approve the HOW ( /soa decompose ) The approved plan becomes a ticket stack — ordered, dependency-aware, sized for review. Architectural judgment stays with you. Ticket authorship goes to the agent. Gate 03 — Approve DONE ( /soa closeout ) An adversarial subagent reviews every ticket before its PR opens. When the phase is complete, you decide whether to accept. Closeout squash-merges the stack onto main. Nothing merges without you. Between the gates, you are not needed That's the whole point. Once you've approved the plan and the tickets, the orchestrator runs the loop: