DEV Community • 2026-07-30 14:00

MQTT vs HTTP for IoT: What I Learned Using Both in Production

Every IoT project eventually reaches the same decision point: Should the device communicate with the cloud over MQTT or HTTP? Both protocols are mature, widely supported, and capable of moving device data reliably. The more useful question is not which protocol is better, but which communication model fits the device. I have used MQTT for production edge clients running on deployed robot unit...

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DEV Community • 2026-07-30 14:00

Jinja2 vs Claude vs SkillSpec in 2026: same skill, 3 ways

Jinja2 vs Claude vs SkillSpec in 2026: same skill, 3 ways SkillSpec Converter wins for anything I need in more than two output formats at once. The Jinja2 script is still faster for a single format I fully control, and asking Claude directly is fine for a one-off, though it quietly drops required fields. I timed the same skill through all three last week. Below are the actual outputs a...

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81 Blog Posts To Learn About Enterprise Software
HackerNoon • 2026-07-30 14:00

81 Blog Posts To Learn About Enterprise Software

Learn everything you need to know about Enterprise Software via these 81 free HackerNoon blog posts.

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DEV Community • 2026-07-30 14:00

A One-Click Button to Turn an Order Into a Paid Invoice

June 2026 Every small business that bills people runs into the same boring, recurring chore: you do the work, you write up what's owed, you send it off, and then you wait — and sometimes chase. For my print shop, an order isn't a tidy "add to cart and check out" affair. It's a custom job: a quantity here, a setup fee there, shipping, tax, the occasional one-off discount because the customer's a r...

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Lobsters • 2026-07-30 13:57

The AI Aesthetic

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DEV Community • 2026-07-30 13:56

Efficient Person Comparison in Recognition Knowledge Bases: Minimizing Computational Overhead and Memory Usage

Introduction: The Challenge of Scaling Person-Pair Comparison In the heart of any person-recognition knowledge base (KB) lies a critical operation: comparing individuals based on their reference embeddings. These embeddings, derived from face and body encodings, serve as the foundation for identifying similarities or overlaps in identity. However, as the KB grows in size and complexity,...

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DEV Community • 2026-07-30 13:55

How I Tamed Legacy Docker (v1.29) for Multi-Stage Microservice Builds

The Challenge: Modern Multi-Stage vs. Legacy Daemon Our goal was straightforward: standardize Dockerfile.base across our active microservices and gateways (auth, user, driver, booking, matching, payment, notification, web-bff, and mobile-bff) to produce consistent :jvm runtime images. However, legacy Docker v1.29.2 presented three hard constraints: No BuildKit Support: Modern cachin...

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Hacker News: Front Page • 2026-07-30 13:55

Europe's fires are just the start

Article URL: https://economist.com/leaders/2026/07/28/europes-fires-are-just-the-start Comments URL: https://news.ycombinator.com/item?id=49110085 Points: 21 # Comments: 2

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Hacker News • 2026-07-30 13:52

Show HN: Hacker Fables – A satirical cyberpunk novel you can read as a man page

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DEV Community • 2026-07-30 13:50

Stop Reaching for a Bigger Model. Fix the Prompt First.

Every time an AI feature disappoints, the reflex is the same: swap in the newer, bigger model. Sometimes that helps. More often, the same model would have nailed it if the prompt had actually told it what to do. I've watched teams burn a sprint on model comparisons when the real problem was a two-line prompt doing four jobs badly. The boring truth: for most day-to-day tasks, the gap between a wea...

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4m read
Canopy and Fhenix Want to Make Encrypted Data the Default State of Onchain Apps
HackerNoon • 2026-07-30 13:45

Canopy and Fhenix Want to Make Encrypted Data the Default State of Onchain Apps

Fhenix's CoFHE brings fully homomorphic encryption to the Canopy Stack, letting developers build onchain apps that compute on encrypted data via TypeScript.

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Echo JS • 2026-07-30 13:44

Is JavaScript Obfuscation Still Worth It in the AI Era?

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Lobsters • 2026-07-30 13:41

A universal approach to mocking with continuations

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DEV Community • 2026-07-30 13:40

OpenAI’s Academic Researcher Access Plan Could Expand Frontier AI Use in Science

OpenAI appears to be preparing a significant expansion of advanced AI access for academia. A reported initiative, called ChatGPT for Academic Researchers, would begin by providing free access to the company’s most advanced models to 10,000 scientists, mathematicians, and engineers, with a stated goal of reaching 100,000 researchers through 2027. The potential program matters because it could shift...

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DEV Community • 2026-07-30 13:38

Building a Simple Currency Converter in React with useState and useMemo

`` One of the best ways to learn React is by building small, practical projects. A currency converter is an excellent example because it introduces state management, user input handling, calculations, and performance optimization—all in a single application. In this tutorial, I built a simple currency converter using React that converts from USD to EUR, GBP, and JPY. For simplicity, I used fixe...

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Magic The Gathering Card Border Relief with CSS
Newest questions tagged css - Stack Overflow • 2026-07-30 13:36

Magic The Gathering Card Border Relief with CSS

I've been wanting to reproduce Magic The Gathering's cards with HTML and CSS for a while now, but I have no clue as to how to recreate the card border relief on some of their visual components, such as the creature type: Does anybody have any idea how to do it? Here's the simple example project I've just created to work on this, the repo is here. p { padding-top: 6px; padding-bottom: 6px; ...

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Hacker News • 2026-07-30 13:35

Show HN: XQL, a query language for screening market data

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Azure Cosmos DB Flaw Exposed Platform-Wide Key That Could Access Any Database
The Hacker News • 2026-07-30 13:34

Azure Cosmos DB Flaw Exposed Platform-Wide Key That Could Access Any Database

A now-patched vulnerability in Azure Cosmos DB could have let an attacker escape the service's Gremlin query sandbox and obtain full read and write access to databases across customer tenants, according to Wiz. Wiz, which codenamed the chain CosmosEscape, said the exploit chain began with a crafted query against a Gremlin database controlled by the attacker. From there, code execution on a

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DEV Community • 2026-07-30 13:30

Editing an ext4 Partition Directly from macOS (No Linux VM Required)

I lost the private key for a Raspberry Pi and needed to add a new public key to /root/.ssh/authorized_keys. The Pi's SD card was plugged into a Mac via a USB reader, so diskutil list could see the partitions fine — but the root filesystem was ext4, which macOS cannot mount. No spare Linux box, no VM set up, just Docker Desktop (which, on Apple Silicon, only gives you a Linux kernel inside its VM —...

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DEV Community • 2026-07-30 13:30

How I built a multi-provider proxy for Grok Build!

I wanted to use Ollama and other providers with Grok Build without being locked to one API. So I built GrokRoute — a local proxy that routes requests to 5+ providers with auto-fallback. How it works Grok Build → GrokRoute (:8083) → Agnes / Groq / Zhipu / Laguna / Ollama The proxy is a single Python file implementing the OpenAI /chat/completions endpoint with SSE streaming. When a request com...

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