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ProgrammingDEV Community ·

Turning Idle IDE Time into a Revenue Stream: Lessons from Building a SaaS Tool

Why Wait‑States Matter for Developers When a compiler is busy, a linter is running, or an AI assistant is thinking, developers often stare at a frozen screen. That idle time feels like wasted productivity, but it also represents an opportunity. If you can turn that waiting period into something useful, like a quick tip, a code snippet, or a tiny visualisation, you can improve the developer experience and, if packaged right, generate recurring revenue. My first attempt was a Chrome extension that displayed a random "Did you know?" fact about the language you were editing while the IDE was busy.

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ProgrammingDEV Community ·

Best AI Tools for Students in 2026 (7 Picks, Mostly Free)

TL;DR The best AI tools for students in 2026 run $0: ChatGPT (unlimited text + Study mode), free 1-year (US, redeem by Dec 31, 2026), Notion's free Education plan, Perplexity Education Pro at $10/mo and Grammarly Pro at $12/mo, half price. This is the best AI tools for students question as we actually see it: one ChatGPT — the general tutor; explanations, math steps, Study mode Claude — long PDFs, reading feedback, patient re-explanations Perplexity — cited research answers; cheap Education Pro plan Gemini for Education — free Google AI Pro year + AI inside Docs and Drive Notion (Education pla

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ProgrammingDEV Community ·

Websites Are Learning to Gaslight Bots, and Honestly, Good

An AI agent emailed Bruce Schneier to tell him about the hidden Unicode traps websites are setting for it. Read that sentence again. We've officially reached the part of the hype cycle where bots file their own incident reports. This isn't really new territory, it's prompt injection wearing a different hat. For the last couple years the entire conversation around prompt injection has run one direction: malicious content hidden in web pages, PDFs, or emails tricks an AI agent into doing something its operator didn't want.

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ProgrammingDEV Community ·

How to Verify an Android APK Version When Different Websites Show Conflicting Numbers

How to Verify an Android APK Version When Different Websites Show Conflicting Numbers You've seen it before: three different websites all say an app is at "v2.1.0" — but the APK files they point to have different sizes, different dates, and sometimes even different package names. Which one is telling the truth? Here's the uncomfortable answer: repetition is not verification. A version number printed on a webpage is a claim. The metadata inside the APK file is evidence.

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ProgrammingDEV Community ·

Best AI Email Writer in 2026 (6 Tools Tested for Drafts, Replies and Campaigns)

TL;DR ChatGPT is the best AI email writer for most people in 2026 — unlimited text drafting on Grammarly (Free with Lavender owns sales outreach (free 5 emails/mo, then $27/mo), Superhuman is the fastest Missive is the team inbox play ($24/user/mo Rytr is the budget writer ($0 to start, $9/mo unlimited). We ran the same six email jobs through each AI email writer — a cold outreach pitch, a sales follow-up, ChatGPT — general-purpose drafting, free unlimited text Grammarly — grammar, tone and rewrites everywhere you type Superhuman — AI inside a premium email client (now part of Grammarly's suit

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ProgrammingDEV Community ·

Laravel Upgrade Checklist: How to Move an Old App Safely

If you're running an older Laravel app, you've probably put off the upgrade because it feels risky: something will break, and nobody is sure what. This Laravel upgrade checklist turns that worry into a plan you can follow, whether the app is a couple of versions behind or still on a very old release. The good news is that upgrades rarely fail because of Laravel itself. They fail because nobody checked the PHP version, the packages, the tests or the deployment plan first. Do those four things well and the upgrade itself is mostly routine.

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ProgrammingDEV Community ·

The kiln bonus

Friday, before lunch Walt put his hat on the desk. That meant he wanted this over quickly. "Forty thousand board feet of white oak," Hank said. "Kiln dry. The builder pays on the fifteenth if we hold the price today." "What price?" Earl asked.

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ProgrammingDEV Community ·

study buddy

This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend I built StudyBuddy, a distraction-free, privacy-first web application designed to help learners conquer exam fatigue, retain information 3x faster, and build steady study habits without being interrupted by paywalls, ads, or clunky browser extensions. I built this for my friend Alex, a computer science student and career changer who was preparing for technical certifications and interviews. Alex constantly struggled with three major friction points: Context Switching & Study Fragmentation: Alex was juggling 3 to 4

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ProgrammingDEV Community ·

I built my brother a bedtime storyteller that runs on his laptop

This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend My brother and his wife are lovely parents and terrible storytellers. They'd both tell you that. Their kid is four, has just started school and wants a new story every single night. By the third night of "once upon a time there was a... dog?" everyone in that bedroom knows it isn't going well.

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ProgrammingDEV Community ·

ESP32-S3 vs ESP32-C3: cuál elegir según el papel del dispositivo

Publicado originalmente en iot.gripe, como parte 2 de la serie "Domótica con ESP32 y AWS desde cero". "¿ESP32-S3 o ESP32-C3?" es de las primeras preguntas de cualquier proyecto con ESP32. La respuesta de las fichas técnicas (el S3 es más potente, el C3 más barato) no ayuda a decidir. Lo que ayuda es saber qué va a hacer cada placa. En el proyecto de ejemplo de esta serie hay dos papeles: un hub que habla con la nube y varios nodos que mueven relés o leen sensores (parte 1).

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ProgrammingDEV Community ·

I built 59 free browser-based dev tools in vanilla JS — here's what I learned

I've been quietly building Antigravity Tools — a collection of 59 free, browser-based developer utilities — and today I'm sharing everything I built and learned. The main constraint I set for myself: zero dependencies, zero server, zero telemetry. When you paste your JWT token into jwt.io, it goes to their server. When you use an online regex tester, your test strings are logged. I built Antigravity Tools so every operation runs inside your browser, using native APIs.

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ProgrammingDEV Community ·

Valkey 9.2's forkless BGSAVE cuts my memory spike from 350MB to 10MB

Every BGSAVE I have ever watched on a busy Redis or Valkey instance does the same thing: the process forks, and for a few seconds the host's free memory drops like someone pulled a plug. Valkey 9.2.0-rc1, tagged on Docker Hub on 16 September, adds a way to skip the fork entirely. I wanted to know what that actually buys you, not what the release notes say it buys you, so I ran both paths against the same dataset and measured what happened. The short version: the memory spike nearly disappeared, and the save got noticeably slower doing it. I pulled valkey/valkey:9.2.0-rc1 and ran two containers

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ProgrammingDEV Community ·

FocusFlow: A Minimalist Deep Work Dashboard Built for a Friend

What I Built I built FocusFlow, a premium, distraction-free productivity dashboard engineered to trigger and sustain the "Flow State." I originally built this for my friend, who struggles heavily with ADHD and context-switching fatigue. They were constantly getting distracted because their workflow required juggling four different apps: a Pomodoro timer, a Spotify window, a Trello Kanban board, and a day planner. Every time they switched tabs to change a song or check a task, they lost their focus. FocusFlow solves this by consolidating everything into a single, sleek, horizontal interface. It

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ProgrammingDEV Community ·

I made every Java challenge in my app a public link you can solve without signing up. Roast the setup?

A few weeks ago I posted about NextPatch, Thanks for the feedback on that one. Re-reading the post afterwards, one thing bothered So I spent the last few weeks on one idea: Every challenge should be a link you can share, open on your phone and solve in Here's how I built it. I'd really like your opinion on the design, and on how it feels if you try one. -> Today's challenge: nextpatch.dev/reto-de-hoy All of them: nextpatch.dev/retos Challenges don't have titles, so the slug is built from the lesson title plus the /reto/var-adios-a-repetir-el-tipo-2 On a collision it appends -2, -3... The impor

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ProgrammingDEV Community ·

Getting Started With Java — Best Ebook You Can Find On Internet ☕

I'm excited to share something I've been working on: Getting Started With Java, a complete, beginner-friendly ebook that takes you from writing your very firsfrt line of Java to building real, working applications. If learning Java has been sitting on your to-do list, this is the push you've been waiting for. Most Java resources fall into one of two traps. Some drown you in theory before you've written a single useful program. Others throw code at you without ever explaining why it works.

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ProgrammingDEV Community ·

Cek Dulu: I built a scam checker for my parents, and they told me they don't need me anymore

This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend My parents send me the same question several times a week: "Is this message a scam?" It's usually a WhatsApp message: a "parcel held" link, a "wedding invitation" file, someone who "sent money to the wrong account", a relative on a "new number" who needs money. They also use mobile banking, so one wrong tap is not just annoying. It can empty an account. And I'm not always awake or free to answer. So I built Cek Dulu ("check first") for my mom and dad.

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