DEV Community • 2026-04-19 20:12

Why closures finally clicked for me after 2 years

Closures aren't magic, but for two years, I genuinely thought they were dark sorcery. If you've ever felt utterly baffled by how a function remembers variables from its parent scope long after the parent has returned, you're definitely not alone. This is about that "aha!" moment when JavaScript closures stopped being an abstract concept and started making actual sense to me. My journey was a mix...

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3m read
DEV Community • 2026-04-19 20:12

One-trick ponies are easy to replace

There's a structural weakness in almost every app built in the last decade and we don't talk about it much because we're all doing it. The app requires our infrastructure to function. The moment we stop paying the server bill, the moment the company gets acquired and wound down, the moment we make a business decision that doesn't work out — the app stops working. Everything the user put into it b...

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5m read
Hacker News: Front Page • 2026-04-19 20:09

Stop trying to engineer your way out of listening to people

Article URL: https://ashley.rolfmore.com/stop-trying-to-engineer-your-way-out-of-listening-to-people/ Comments URL: https://news.ycombinator.com/item?id=47827259 Points: 11 # Comments: 1

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Hacker News: Front Page • 2026-04-19 20:04

A. J. Ayer – ‘What I Saw When I Was Dead’ (1988)

Article URL: https://www.philosopher.eu/others-writings/a-j-ayer-what-i-saw-when-i-was-dead/ Comments URL: https://news.ycombinator.com/item?id=47827215 Points: 6 # Comments: 0

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DEV Community • 2026-04-19 20:03

7 Best Free Image Optimization Tools Online (2026 Comparison)

7 Best Free Image Optimization Tools Online (2026 Comparison) Why image optimization matters in 2026 Images account for roughly 50% of the total bytes transferred on the average web page, according to the HTTP Archive . Unoptimized images slow down page loads, damage Core Web Vitals scores, increase CDN costs, and reduce conversion rates. A one-second delay in load time can reduce conv...

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11m read
DEV Community • 2026-04-19 20:02

Data pipeline around 15 minute city

Hi, I just wrapped up my second data engineering pipeline. Repository: GitHub - OSM 15 Minute City Dashboard: Streamlit - OSMaps It is based on 15 minute city concept. Ingests open street maps, transformations via spark & dbt, streamlit servers as dashboard and airflow is used for orchestration. Scoring weights are arbitrary and I want to make it more scientific. Would love to hear your tho...

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1m read
DEV Community • 2026-04-19 20:01

Why watermark your photos?

Why watermark your photos? If you have ever found one of your images on someone else's website, social media account, or marketing material without credit, you already know the problem. Image theft is not an edge case, it is the default behavior of the internet. According to research from Copytrack, approximately 85% of images shared online are used without the photographer's permission. That inc...

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13m read
DEV Community • 2026-04-19 19:59

Aprenda avaliar a qualidade do seu agente de AI, RAG e LLM

Introdução Exatamente hoje 19/04/2025 eu venho acompanhando ou pelo menos tentando acompanhar as novidades dos Harness, protocolos, novas versões de LLM e frameworks. Porém trabalhando e conversando com a comunidade eu percebi uma certa despreocupação e desconhecimento sobre os "evals" que nada mais são que testes onde você coloca métricas em qual quer etapa de qualquer projeto relacion...

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26m read
Modernizing U2 UniData: From DICTionaies/UniBasic code to a Live CRM in Minutes using UOFastCoder Skills & Agents + MCP.
DEV Community • 2026-04-19 19:58

Modernizing U2 UniData: From DICTionaies/UniBasic code to a Live CRM in Minutes using UOFastCoder Skills & Agents + MCP.

UOFastMCP + UOFastCoder let AI agents read your live U2 UniData schema and generate a complete Python Flask (WTForms) based CRM app. If you're running a business on U2 UniData, your data is already there — CLIENTS, CONTACTS, ORDERS, INVENTORY. What's missing is a modern interface your team can actually use. UOFastMCP and UOFastCoder are two open-source tools that let an AI agent read your liv...

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3m read
DEV Community • 2026-04-19 19:57

How I Built “Viral Ink” - An AI System That Turns Ideas Into Viral LinkedIn Content

In today’s world, content is currency. But consistently writing engaging, high-quality posts is hard — especially when you're busy building, shipping, and scaling products. So I built Viral Ink — an AI-powered system that transforms raw ideas into polished, viral-ready LinkedIn content and email outputs. This wasn’t just another “prompt wrapper.” I designed it as a structured AI pipeline that th...

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3m read
DEV Community • 2026-04-19 19:57

SvelteKit 2: Code-based router instead of file-based router now is just a Gist!

The idea is simple — just create universal [...path] folder and proxy everything through it specifying patterns in some urls.ts. So, we have to create minimal and universal +page.js and +page.server.js with load functions, find there 'pattern' in urls.ts by url.pathname we know in load, set some routeStore, containing desired page, and get it in +page.svelte. It's kinda tricky, so we also need c...

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4m read
DEV Community • 2026-04-19 19:56

Governance metadata in A2A Agent Cards, shipping the superset

A2A Agent Cards describe what an agent can do, where it lives, and how to talk to it. What they do not describe is governance posture. Two agents can hold identical cards and behave nothing alike in production. We shipped a reference implementation under extensions.asqav.governance inside the standard AgentCard envelope. Three fields carry the posture: trust_score, retention_ttl_seconds, and deri...

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2m read
DocuSign Alternatives in 2026: What to Look for in an E-Signature Platform
DEV Community • 2026-04-19 19:55

DocuSign Alternatives in 2026: What to Look for in an E-Signature Platform

DocuSign pioneered the e-signature category, but in 2026 the landscape looks very different. Teams evaluating e-signature tools have dozens of options, each optimized for different use cases — embedded signing for SaaS apps, AI-powered form generation, industry-specific waivers, or pure API-first workflows. This guide breaks down what actually matters when choosing an e-signature platform, the t...

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5m read
DEV Community • 2026-04-19 19:54

How I Passed the GH-200 Exam Without Increasing My Study Hours

I work in an Azure-focused systems and cloud administration role, so GitHub Actions was already part of my day-to-day life before I decided to take GH-200. I was not walking in as a beginner. I had already written workflow files, handled secrets, fixed broken jobs, and connected GitHub automation to real delivery work. That experience helped, but it also gave me the wrong kind of confidence. I tho...

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16m read
DEV Community • 2026-04-19 19:49

Beyond Page Speed: Why Every Developer Needs a Warmup Cache Request Strategy

Every website owner has faced this "invisible" performance killer: You push a fresh update, clear your server cache, and suddenly your site feels sluggish. For that first visitor, the experience is frustratingly slow. The culprit isn't your hosting—it's a Cold Cache. This is where mastering the Warmup Cache Request becomes a critical skill for modern web performance. The Problem: The "First Load...

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2m read
Vibe Designing
DEV Community • 2026-04-19 19:45

Vibe Designing

Since Karpathy coined the term vibe coding, some of my non-coding friends have been showing me their work and teasing me that they can now do everything I can. Anthropic just dropped Claude Design. Now it's my turn. Shelfcritter, the polygon I've been building Shelfcritter - a book management app - on and off for a while. It's not really about the books. It's my polygon for testing dif...

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5m read
DEV Community • 2026-04-19 19:44

Multi-Agenten-Systeme: Wenn KIs miteinander arbeiten

Stell dir vor, du willst einen langen Bericht über den deutschen Wohnungsmarkt erstellen. Du bittest eine KI darum. Sie recherchiert, schreibt, zitiert und liefert dir nach fünf Minuten einen Text, der gut klingt, aber bei näherer Betrachtung Zahlen aus 2023 enthält, eine Quelle falsch zitiert und einen zentralen Trend komplett ignoriert. Was wäre, wenn stattdessen drei spezialisierte KIs zusamme...

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5m read
DEV Community • 2026-04-19 19:42

Introduction to Machine Learning

What is Machine Learning? One of the many subsets of AI that focus on learning patterns from datasets to make predictions or decisions without explicit programming. By training algorithms on large datasets, these models generalize to new data, powering applications like image recognition, recommendation engines, and language models. Types of Machine Learning. 1.sup...

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# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure
DEV Community • 2026-04-19 19:42

# Building Solana data flows: Using n8n to automate block height extraction through GetBlock’s RPC infrastructure

The Solana ecosystem moves incredibly fast. With block times sitting around 400 milliseconds, anyone building automated workflows, indexing tools, or real-time analytics dashboards runs into one major challenge: RPC reliability and latency. If you depend on overloaded public endpoints, your automation is always one delay away from breaking. When a pipeline starts lagging or drops requests, the wh...

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3m read
DEV Community • 2026-04-19 19:42

Reasoning Models sind kein Upgrade, sie sind ein anderes Werkzeug

Stell dir vor, du bezahlst für ein Modell das viermal so oft falsch liegt und vierzehn mal so viel kostet wie das Standardmodell. Das klingt absurd. Und es ist passiert: In einer Evaluation von splx.ai aus 2025, die o3-pro gegen GPT-4o in einem Versicherungs-Use-Case getestet hat, verlor das "bessere" Modell auf ganzer Linie. Das ist nicht das Versprechen, das OpenAI macht, wenn es Reasoning Mode...

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4m read
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