DEV Community • 2026-04-24 12:45

JavaScript Closures Explained: Why Your Functions Remember Everything

Read the full article here JavaScript Closures Explained Closures are functions that remember variables from their outer scope, even after the outer function returns. Understanding them solves common issues like the var loop bug, stale React hooks, and memory leaks. Key Points Closures capture references, not values – functions hold pointers to variables, not snapshots...

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DEV Community • 2026-04-24 12:44

Free LocalStack alternatives in 2026: fakecloud, MiniStack, floci, Moto

Originally published on fakecloud.dev. LocalStack's Community Edition went proprietary in March 2026. Since then a few free, open-source alternatives have surfaced or gained momentum. This post covers the four that keep coming up — fakecloud, MiniStack, floci, and Moto — and what each one is, architecturally. Upfront disclosure: I maintain fakecloud. Bias declared. What this post avoids: a head-...

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5m read
Build a Simple App That Connects to Midnight Lace Wallet
DEV Community • 2026-04-24 12:35

Build a Simple App That Connects to Midnight Lace Wallet

Introduction Hello everyone! In this article, we will look at Midnight, a privacy-focused blockchain, and its dedicated wallet, Lace Wallet. Lace | The light wallet platform to explore Web3 Discover the new light wallet platform from Input Outpu...

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6m read
QuecPython + sms: SMS Functionality
DEV Community • 2026-04-24 12:35

QuecPython + sms: SMS Functionality

Overview With the encapsulation capability of QuecPython, developers can quickly implement SMS sending and receiving functions without dealing with complex AT commands. In the REPL interactive environment, SMS sending can be completed with just one line of code, making IoT communication development more efficient! Core Advantages Minimalist Call: Send SMS directly with sms....

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2m read
DEV Community • 2026-04-24 12:33

Document Parsing vs Document Understanding: What’s the Difference?

Documents move through every enterprise process, yet many systems still struggle to interpret them correctly. Text gets extracted, but meaning gets lost. Fields are captured, but relationships between them remain unclear. This leads to manual corrections, delays, and inconsistent outputs across workflows. As document formats vary and complexity increases, basic extraction methods start to fail. Th...

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6m read
DEV Community • 2026-04-24 12:33

VLAN Segmentation: Securing IoT Devices from the Main Network

This isn't about making your network "smart"; it's about making it resilient to the inevitable stupidity of your "smart" devices. If you've got cheap junk phoning home on your primary network, you're not just inviting trouble, you're leaving the front door unlocked with a giant "Hack Me" sign outside. Let's fix that. I. Introduction: Your "Smart" Toaster Is a Security Liability, and Here...

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DEV Community • 2026-04-24 12:29

QuecPython + audio: Implement Audio Recording and Playback

Overview As a development framework designed specifically for the Internet of Things, QuecPython provides complete audio processing capabilities for embedded devices through highly encapsulated Python interfaces. This article mainly describes how to quickly implement audio function development with QuecPython. Core Advantages • Minimalist Development: Complete basic audio re...

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3m read
Hacker News: Front Page • 2026-04-24 12:27

The operating cost of adult and gambling startups

Article URL: https://orchidfiles.com/stigma-is-a-tax-on-every-operational-decision/ Comments URL: https://news.ycombinator.com/item?id=47889279 Points: 6 # Comments: 0

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DEV Community • 2026-04-24 12:27

Are we Using AI at the Wrong Scale?

What if I told you that AI can be used more efficiently - and in a way that actually enhances everybody's life and work quality? That the AI bubble didn't have to inflate the way it did? That AI could still evolve more rationally and equally? You might think I just want to catch your attention. Maybe, but not without reason - I want you to see the other side, the future we can and should build. B...

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4m read
DEV Community • 2026-04-24 12:25

Building FreeSay: A $2.99/month AI speaking tutor for the next billion learners

TL;DR I built FreeSay — an AI-powered speaking practice app for language learners. Real-time conversation with an AI teacher, 43 UI languages, 15 learning languages, $2.99/month (about 50x cheaper than Cambly's $150/month plan). Live: https://www.freesay.app Why I built it Cambly, italki, Preply — all great apps, but priced for developed-country wallets. A student in India,...

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1m read
DEV Community • 2026-04-24 12:23

I Built a PDF Toolkit as a Student (And Deployed It for Free)

Flask, PyMuPDF, Groq, and a lot of jugaad engineering Every student has been there. It's 11 PM. You need to compress a PDF before submitting it, convert a JPEG to PDF for a form, or quickly summarize a 40-page document before an exam. You open some sketchy website, it watermarks your file, asks you to pay, and uploads your documents to who-knows-where. I got tired of it. So I built my own. D...

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6m read
QuecPython + camera: Implement QR Code/Barcode Scanning and Photo Capture
DEV Community • 2026-04-24 12:22

QuecPython + camera: Implement QR Code/Barcode Scanning and Photo Capture

Overview With a QuecPython development board paired with a camera module, developers can easily implement code scanning (QR code/barcode recognition) and photo capture functions, which are applicable to scenarios such as smart access control, industrial inspection, and mobile payment. Core Features Minimalist Development Experience: No need to write underlying drivers, compl...

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Visual Studio Code - Code Editing. Redefined. • 2026-04-24 12:22

Visual Studio Code 1.118

Learn what's new in Visual Studio Code 1.118 (Insiders) Read the full article

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DEV Community • 2026-04-24 12:22

How to Audit What Your AI Agent Actually Did After the Session

When you hand off a multi-hour task to an AI coding agent and come back to the results, the right question isn't "did it finish?" — it's "did it stay within scope?" Agents running Claude Code, Codex, or OpenCode regularly do more than instructed: touching files outside the task boundary, introducing abstractions nobody requested, reorganizing directory structures that were working fine. The damage...

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14m read
DEV Community • 2026-04-24 12:22

Why Claude Code PreToolUse Hooks Can Still Be Bypassed

Claude Code's PreToolUse hooks give you a programmatic interception point before any tool executes — write a hook that exits non-zero and the tool call is blocked. That's the theory. In practice, a reproducible proof-of-concept shared in r/ClaudeCode demonstrated that even after building comprehensive PreToolUse hooks designed to protect a .env file, the agent was still able to make its contents a...

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13m read
DEV Community • 2026-04-24 12:20

Terraform Visualization: 5 Ways to See What Your Code Actually Builds

You've got 3,000 lines of Terraform spread across 40 files, organized into modules, with variables referencing other variables referencing data sources. It works. It deploys. But can you actually see what it builds? This is one of the most common challenges in infrastructure-as-code. The code is the source of truth, but it's not visual. You can't glance at a `.tf` file and immediately unders...

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5m read
DEV Community • 2026-04-24 12:19

How to Create AWS Architecture Diagrams in 2026: A Complete Guide

Architecture diagrams are one of those things every team needs but nobody wants to maintain. You spend an hour in draw.io moving boxes around, and by the time you share it, someone has already changed the infrastructure. After 9 years of building cloud infrastructure, I've tried every method — from whiteboards to $500/month enterprise tools. Here's a practical breakdown of every approach availabl...

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7m read
DEV Community • 2026-04-24 12:19

Free vs Paid Cloud Architecture Diagram Tools — Honest Comparison 2026

Cloudcraft charges $49 per month. Draw.io costs nothing. InfraSketch generates diagrams from your existing code for free. Are the paid tools actually worth the money, or are you paying for features you don't need? I've used all of these tools in production environments over the past few years. Here's an honest breakdown — no affiliate links, no sponsored content, just what actually works and what...

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DEV Community • 2026-04-24 12:19

Cleared the Anthropic Claude Certified Architect - Foundations exam!

Cleared the Anthropic Claude Certified Architect - Foundations exam! Sharing what stood out while passing the CCA-F as an early adopter, key to building robust production AI systems: • Explicit beats implicit: Few-shot examples + JSON schemas >> vague instructions. If you don't specify it, LLMs will improvise (often badly). Keep your tools/skills definitions tight. • Root cause > band...

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QuecPython + USBNET: Implement USB Network Adapter Functionality
DEV Community • 2026-04-24 12:14

QuecPython + USBNET: Implement USB Network Adapter Functionality

USBNET Overview USBNET (USB Networking) is a technology that enables network communication via a USB interface. It allows devices to emulate Ethernet over a USB connection (Ethernet over USB) or directly transmit network data through USB links. It is widely used in scenarios such as embedded devices, industrial control, virtual machines, and portable devices. Core Features of ...

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