DEV Community • 2026-04-21 19:49

Terraform: Manage Cloud Infrastructure as Code, Stop Clicking Around

Originally published at recca0120.github.io Every time you set up a new environment, you click through the cloud console one resource at a time. Three months later a colleague asks how it was built — and you've forgotten yourself. Staging and prod silently diverge until something breaks. Terraform describes all of it in code. plan previews changes, apply executes them. There's a git history, it's...

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DEV Community • 2026-04-21 19:48

Two SQL NULL Traps: Missing JOIN Rows and UNIQUE Constraints That Do Nothing

Originally published at recca0120.github.io JOIN two tables on a nullable column and the rows disappear. Insert two NULLs into a UNIQUE column and neither insert fails. Both problems share the same root: SQL defines NULL as unknown, and unknown is never equal to anything — including another unknown. What NULL Actually Means In SQL, NULL means "unknown value" — not zero, not empty strin...

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5m read
DEV Community • 2026-04-21 19:42

Your C4 Diagrams Are Lying to You (And AI Coding Is Making It Worse)

I've used the C4 model to document every system I've ever built. Context → Container → Component → Code. If you haven't encountered it: think of it like Google Maps for your software. You start zoomed out how does your system fit in the world, who uses it, what external systems does it touch? Then you zoom in layer by layer until you're looking at individual components and how they talk to each ot...

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DEV Community • 2026-04-21 19:42

CachyOS Kernel 7.0 Review on Ryzen 5 5500U (Hyprland Performance Test)

🚀 CachyOS Kernel 7.0 + Hyprland — Real-World Review on Ryzen 5 5500U Most Linux kernel reviews obsess over benchmarks. That’s not what matters for daily use. If you’re running something like Hyprland with heavy dotfiles, what actually matters is: Animation smoothness Input latency Frame consistency So I tested CachyOS Kernel 7.0 on my real setup — no synthetic benchmarks, just dai...

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DEV Community • 2026-04-21 19:42

How to Capture Console Errors and Network Requests in JavaScript

When a user reports a bug, the information you actually need is already gone. The console error that triggered it fired three page loads ago. The failed network request happened before they even thought to open a ticket. The fix is to capture this data continuously — from page load, not from the moment the user clicks "report a bug". Here's how to build that from scratch. Intercepting c...

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DEV Community • 2026-04-21 19:39

Migrating from Open Exchange Rates to AllRatesToday: A Developer's Guide

Migrating from Open Exchange Rates to AllRatesToday: A Developer's Guide If you've decided to move off Open Exchange Rates — for real-time rates, any-base-currency flexibility, official SDKs, or free historical data — the migration itself is usually a one-afternoon job. The JSON shapes are similar enough that most of the work is mechanical. This guide walks you through every endpoint, ...

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What’s new in Firefox mobile: Less clutter, more control and a free built-in VPN
The Mozilla Blog • 2026-04-21 19:36

What’s new in Firefox mobile: Less clutter, more control and a free built-in VPN

Mobile browsing hasn’t kept up with how people actually use their phones. Right now, even basic tasks can feel harder than they should. Finding what you need can mean scrolling through ads and filler content, keeping track of too many tabs, or thinking twice about how private your connection is. A mobile browser should do […] The post What’s new in Firefox mobile: Less clutter, more control ...

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Understanding Transformers Part 10: Final Step in Encoding
DEV Community • 2026-04-21 19:36

Understanding Transformers Part 10: Final Step in Encoding

In the previous article, we explored the use of self-attention layers, now we will dive into the final step of encoding and start moving into decoderss As the final step, we take the positional encoded values and add them to the self-attention values. These connections are called residual connections. They make it easier to train complex neural networks by allowing the self-attention layer to fo...

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daverupert.com • 2026-04-21 19:36

10,000-watt GPU meet 40-watt lump of meat

The use of AI is leading to burnout among its greatest advocates as they hit the limit of their meta-cognitive abilities: “I end each day exhausted—not from the work itself, but from the managing of the work. Six worktrees open, four half-written features, two ‘quick fixes’ that spawned rabbit holes, and a growing sense that I’m losing the plot entirely.” As someone with ADHD, this sounds painfu...

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Build your own blog post view counter on AWS Free Tier
DEV Community • 2026-04-21 19:35

Build your own blog post view counter on AWS Free Tier

Your blog deserves to know it's being read. A Lambda function counts the views, DynamoDB remembers them, and it's all eligible for the Free Tier. Last updated: April 20, 2026 Most analytics tools require an account, a script tag, and a separate dashboard you have to check outside your infrastructure. If you're already on AWS, you can build a view counter that lives in your own account and stores...

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Newest questions tagged reactjs - Stack Overflow • 2026-04-21 19:33

Real-Time Currency Conversion API with Frequent Data

I am currently using allratestoday.com's currency API for my website since it provides real-time currency rates. Are there any other websites which provide real-time exchange rates, not daily rates or hourly rates? Because it updates in the 60s, are there any API updates less than this?

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DEV Community • 2026-04-21 19:31

I Built tfdrift Free Terraform Drift Detection With Severity Alerts

I Built a Free Terraform Drift Detector — Here's Why If you manage Terraform infrastructure, you've probably experienced this: someone tweaks a security group in the AWS console "just for testing," forgets about it, and three months later your terraform apply blows up — or worse, that change silently creates a security hole that nobody catches. This is infrastructure drift. And there's...

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Lobsters • 2026-04-21 19:25

Switching from uv to PDM

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I Tracked My To-Do List for 30 Days. 73% of My 'Urgent' Work Was Someone Else's Emergency.
DEV Community • 2026-04-21 19:22

I Tracked My To-Do List for 30 Days. 73% of My 'Urgent' Work Was Someone Else's Emergency.

I tracked every task I touched for 30 days. Not in a project management tool; in a spreadsheet with three columns: task, time spent, and whether it actually mattered a week later. The results were embarrassing. 73% of the tasks I labeled "urgent" on Monday were irrelevant by Friday. Most of them were other people's priorities that I adopted because they arrived with exclamation marks in the subje...

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7m read
DEV Community • 2026-04-21 19:20

What Did Your Agent Do Last Night?

You deployed an AI agent. It ran overnight. In the morning, you have no idea what it actually did, why it made those decisions, or whether anyone tampered with the record... The problem Everyday AI agents are taking real actions; sending emails, modifying databases, calling APIs, processing payments. When something goes wrong, nobody can produce a provable, tamper-evident record of wha...

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DEV Community • 2026-04-21 19:20

How to Use the AllRatesToday MCP Server with Claude Code and Cursor

How to Use the AllRatesToday MCP Server with Claude Code and Cursor AI coding tools are great at writing code and explaining diffs, but they're unreliable at anything numeric and time-sensitive. Ask Claude Code "what's today's USD to EUR rate?" and you'll get a stale guess. The Model Context Protocol (MCP) fixes this by letting clients call real tools. This post walks through the AllRat...

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DEV Community • 2026-04-21 19:19

The Rules We Didn't Know We Followed

A dispatch from the Kadmiel Chronicle — stories from 43,000 colonists 38 light-years from Earth. Read the original at kadmiel.world. I was sitting in the Chronicle office at six in the morning, going through transcripts from last week's Spoke Council session, when I noticed something I'd been noticing for years without ever really seeing it. Councilor Demir was arguing with Leah Okafor about t...

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DEV Community • 2026-04-21 19:19

Vibe coding will produce the worst legacy codebases we've ever seen

AI-generated code ships fast today and becomes unmaintainable debt tomorrow. And I think we're sleepwalking into the worst legacy codebases the industry has ever produced. Developers have demonstrated building full apps — think a clone of a major social platform — in under a week using AI agents. That's genuinely impressive on the surface. But nobody's asking the uncomfortable follow-up: who main...

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DEV Community • 2026-04-21 19:19

The Channel That Fixed Everything

A dispatch from the Kadmiel Chronicle — stories from 43,000 colonists 38 light-years from Earth. Read the original at kadmiel.world. The first time I cut open a failed hydrogen fuel cell, I found water. Not a lake. A few millilitres, trapped in micro-channels that were supposed to be moving oxygen. The cell had run for eleven minutes before dying, which was longer than the cells at Positions 3...

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DEV Community • 2026-04-21 19:18

The Flesh We Grew Without the Animal

A dispatch from the Kadmiel Chronicle — stories from 43,000 colonists 38 light-years from Earth. Read the original at kadmiel.world. I ate liver this morning. That sentence doesn't mean anything to you on Earth. But if you've spent eight years eating legumes, engineered casein, and whatever Kadmiel's sardine equivalents can provide, you understand why I sat alone in the bio-processing lab at 6...

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