DEV Community • 2026-04-20 05:38

Monitoring & Observability

Metrics tell us something is wrong. Logs tell us why. We need both. This post covers how I set up the full observability stack for ASTRING — Prometheus and Grafana for metrics, Fluent Bit and Loki for logs, and Alertmanager. Metrics: Prometheus and Grafana Why Prometheus Prometheus is the standard for Kubernetes monitoring. It scrapes /metrics endpoints from our services and...

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How I Built An Automatic Railway Gate Control System Using An Arduino Uno
DEV Community • 2026-04-20 05:37

How I Built An Automatic Railway Gate Control System Using An Arduino Uno

Kiswin / Automatic-Railway-Gate-Control-System Automatic railway gate system using Arduino Uno. An IR sensor detects the train, a servo motor lowers/raises the gate, and a buzzer with LED gives warnings. A simple prototype showing how real railway crossings automate safety and reduce human error. Automatic-Rail...

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Energy Leak Scout: Find the Waste. Cut the Bill.
DEV Community • 2026-04-20 05:30

Energy Leak Scout: Find the Waste. Cut the Bill.

This is a submission for Weekend Challenge: Earth Day Edition What I Built Energy Leak Scout: Track Every Watt, Save Every Month. Energy Leak Scout is a Flutter + Node.js app that helps users understand daily home energy usage and reduce waste. Users enter appliance runtime (hours/day), view estimated electricity usage and trends, and get AI-generated explanations for high consumption ...

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Product Hunt — The best new products, every day • 2026-04-20 05:27

Cosmic Agent Marketplace

AI agents for your team, built into your CMS Discussion | Link

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DEV Community • 2026-04-20 05:20

Why Do I Keep Killing My Side Projects?

I recently shut down Bloudme. It was my second personal project, which started as an RSS reader and quietly died. Before that, there was Podiscover — a social media platform for podcasts. Two projects, two deaths. At some point, you need to stop blaming circumstances and start asking harder questions. This isn't a piece that starts with "what I learned from failure" and ends optimistically. This ...

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DEV Community • 2026-04-20 05:18

Full-Proof: Distillery 0.4.0 and the Agent Memory Problem

Full-Proof: Distillery 0.4.0 and the Agent Memory Problem !!! note "Release summary" Distillery 0.4.0 shipped April 19, 2026. It's the release where the MCP tool surface becomes a public contract: stable tool names, consistent error codes, predictable response shapes. The release body lives on the GitHub release page. A few weeks ago I wrote the first post in this serie...

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DEV Community • 2026-04-20 05:18

I built a Chrome extension that turns any competitor's website into a UX intelligence report

The problem I kept running into Every time I needed to do competitive research, the workflow was the same painful loop. Open 10 tabs, take notes in a doc, screenshot things, try to remember what you saw on that one checkout flow two sites ago. Then spend an hour reformatting everything into something you could actually show someone. The insights were always there. The process was the problem. Wh...

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Building a cinematic Sci-Fi Dashboard using 100% Vanilla JS & CSS (No React/Tailwind)
DEV Community • 2026-04-20 05:17

Building a cinematic Sci-Fi Dashboard using 100% Vanilla JS & CSS (No React/Tailwind)

Hey DEV community! 👋 As a UI/UX Architect, I’ve noticed a frustrating trend in the B2B SaaS space, particularly in cybersecurity (SIEM, SOC, UEBA tools): the backends are incredibly powerful, but the frontends often look like boring, overly complex Excel spreadsheets. I wanted to bridge the gap between Hollywood-style cinematic interfaces and actual, high-density functional layouts. So, I buil...

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Newest questions tagged javascript - Stack Overflow • 2026-04-20 05:17

How to redirect user to home if they're already logged in and is trying to access the login page?

I have a component that redirects the user to whatever protected route they were trying to access after they log in via: export const ProtectedRoute = () => { const { token } = useAuth() const location = useLocation() if (!token) { return <Navigate to="/login" replace state={{ from: location }} /> } return <Outlet /> } and setToken(token) const origin = loca...

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DEV Community • 2026-04-20 05:14

reptyr: Move a Running Process Into tmux After Forgetting to Start It

Originally published at recca0120.github.io You SSH'd in and started a job that will run for hours. No tmux. No nohup. Now you need to leave, and closing the window kills the process. reptyr moves it into tmux so you can disconnect safely. What reptyr Does reptyr uses the ptrace syscall to re-attach a running process to a new terminal. It genuinely changes the process's controlling ter...

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Newest questions tagged css - Stack Overflow • 2026-04-20 05:14

My very first code to my school project, be kind to me and please help me

this is my very first code and I’m just a student trying to learn and improve step by step. I know I still have a lot to learn, but I’m doing my best to understand how everything works and get better every day. I’d really appreciate any feedback, advice, or tips that could help me grow as a programmer. Please be kind — I’m still at the beginning of my journey css * { font-family: "Josefin San...

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What Happens Between @SqsListener and Your Method in Spring Cloud AWS SQS
DEV Community • 2026-04-20 05:13

What Happens Between @SqsListener and Your Method in Spring Cloud AWS SQS

Originally published at tomazfernandes.dev. You write a method, add @SqsListener, and messages start arriving. It is easy to see that as a simple annotation-to-method shortcut. In practice, Spring Cloud AWS SQS assembles a listener container at startup based on that annotation, and at runtime the container holds an async pipeline between the queue and your code. That pipeline controls how messa...

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DEV Community • 2026-04-20 05:13

Chain of Custody for Digital Evidence: How to Prove Your Video Wasn't Faked

Chain of Custody for Digital Evidence: How to Prove Your Video Wasn't Faked An insurance adjuster receives dashcam footage from a policyholder claiming another driver ran a red light. The video looks authentic. The timestamp shows it was recorded before the claim was filed. But with AI-generated deepfakes now indistinguishable from real footage, how does the adjuster prove this evidence...

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DEV Community • 2026-04-20 05:13

Arbeitszeiterfassung in Deutschland: Neue gesetzliche Anforderungen und smarte Lösungen

Die Arbeitszeiterfassung in Deutschland steht vor einem grundlegenden Wandel. Arbeitgeber sind bereits verpflichtet, die Arbeitszeiten ihrer Beschäftigten zu dokumentieren, um die Einhaltung der gesetzlichen Regelungen sicherzustellen. Doch mit dem neuen Referentenentwurf zur Änderung des Arbeitszeitgesetzes (ArbZG) wird diese Pflicht noch präziser: Beginn, Ende und Dauer der täglichen Arbeitsze...

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DEV Community • 2026-04-20 05:12

Python Mock Pitfall: Patch Where It Is Used, Not Where It Is Defined

Originally published at recca0120.github.io from utils import sum, then patch('utils.sum') — and the mock never takes effect. Switch to patch('helloworld.sum') and it works. This is the most common Python mock mistake. Once you understand why, you won't hit it again. Reproducing the Problem utils.py: def sum(a, b): return a + b helloworld.py: from utils import sum def ...

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DEV Community • 2026-04-20 05:12

Day 77 of #100DaysOfCode — Building DevBoard: Progress, Lessons, and What's Next

Honesty time. The plan was to deploy DevBoard today. That's not happening, and I think it's worth writing about why, because what happened this week is more representative of real software development than any clean tutorial ever is. What Got Built DevBoard is a developer job board with two sides: employers who post jobs and candidates who apply. Over the past few days, I built the ...

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Why Current LLMs Can't Reach AGI (and more)
DEV Community • 2026-04-20 05:11

Why Current LLMs Can't Reach AGI (and more)

The AI field is celebrating benchmarks while the ceiling gets closer. Every few months, a new model comes out, and more often than not with more parameters than their previous versions. And it is being celebrated in the name of scaling, but scaling towards memorisation is antithetical to generalisation, which is ML's foundational goal. Increasing parameter count works, but it proves that the cu...

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DEV Community • 2026-04-20 05:11

terraform test: The Built-in Terraform Module Testing Framework, No Go Required

Originally published at recca0120.github.io You've written a Terraform module. How do you verify the variable validation rules work? That versioning gets enabled when the flag is set? That tags are passed through correctly? Before, you either squinted at terraform plan output or wrote Terratest in Go. Since Terraform 1.6, there's a built-in testing framework. Write tests in HCL, run with terrafor...

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DEV Community • 2026-04-20 05:09

【2026年04月20日】Ollama 的 5 个隐藏用法 🔥

前言 @simonw @karpathy @ylecun 大多数开发者只知道 ollama run llama3，但 Ollama 远不止一个命令行工具。 令人惊讶的事实：Ollama 1.0 之后，已经支持多模型并行、API 服务器、RAG 检索、本地嵌入向量，甚至可以通过 Modelfile 构建完全自定义的推理管道——但这些功能 90% 的用户从未探索过。 今天分享 5 个 Ollama 隐藏用法，每一个都附可运行代码。 隐藏用法 1：同时运行多个模型（多模型并发推理） 为什么大多数人不知道： Ollama 默认启动一个模型，但它的 API 服务器支持多模型并发。很多人以为要多开 Docker 容器才能同时跑不同模型，其实完全不需要。 原理： Ollama API 是基于 Go 的高性能 HTTP 服务器，每个请求在独立 g...

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Hacker News: Front Page • 2026-04-20 05:05

Stripe's Payment APIs: the first 10 years (2020)

Article URL: https://stripe.dev/blog/payment-api-design Comments URL: https://news.ycombinator.com/item?id=47830575 Points: 9 # Comments: 0

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