Real Python • 2026-04-21 12:10

Quiz: How to Conceptualize Python Fundamentals for Greater Mastery

Check your understanding of a framework for conceptualizing Python fundamentals, from defining concepts to comparing similar ideas.

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DEV Community • 2026-04-21 12:10

A Longer Introduction

This introduction could perhaps be more aptly titled as "Who am I and why am I here?" While I posted a shorter intro in the introductory thread, I think it's easier to use my first article to give you some insight into myself and my motivations. My name is Sandra Clark, and through my company, Shayna Productions, I offer accessibility consulting services, including identifying, explaining, and r...

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DEV Community • 2026-04-21 12:08

Exploring Go through backend engineering practices (Part 1)

During my first week working with Golang, I focused less on basic syntax and more on applying familiar backend engineering principles within a new ecosystem. The goal wasn’t just to learn Go, but to understand how established patterns translate into its design philosophy. To explore this, I built a simple to-do list API using the Gin framework, SQLite for persistence, and Uber’s Dig for dependen...

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2m read
How Persistent Prompt Injection Attacks Live On After You've Locked the Door
HackerNoon • 2026-04-21 12:08

How Persistent Prompt Injection Attacks Live On After You've Locked the Door

Prompt injection isn’t just session-based. Persistent attacks embed in data and survive access revocation, requiring new AI security architectures.

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The Job Title That Didn’t Exist Last Year
DEV Community • 2026-04-21 12:07

The Job Title That Didn’t Exist Last Year

Why Enterprise AI Needs a Translation Layer Between Data and Decisions Gartner projects that over 40% of agentic AI initiatives will be abandoned by 2027. Reading that, a reasonable person might conclude that there is an inherent issue with the technology. However, I know from my own experience building agents that when done correctly, they deliver. The failure pattern we keep hearing about ...

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DEV Community • 2026-04-21 12:07

3 Things I Learned Benchmarking Claude, GPT-4o, and Gemini on Real Dev Work

If you're still picking LLM providers by gut feeling, you're leaving money on the table. I ran 5 developer use cases through Claude 3.5 Sonnet, GPT-4o, and Gemini 2.0 Flash using PromptFuel to measure token usage and cost. The results? More interesting than "fastest wins." Here's what I found. The Setup I took 5 tasks I actually do in PromptFuel development: JSON schema validation p...

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5m read
DEV Community • 2026-04-21 12:06

El cliente no tiene siempre la razón

"A system is never just software and hardware; it is a social system." Bjarne Stroustrup. Hemos escuchado toda la vida que "el cliente siempre tiene la razón", pero en el desarrollo de sistemas, esta máxima puede ser nuestro primer paso hacia el fracaso de un proyecto. Desde nuestra formación inicial en ingeniería o sistemas, se nos entrena para aceptar el requerimiento como una verdad absolut...

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DEV Community • 2026-04-21 12:05

I built TokenBar because I was tired of guessing my AI spend

I kept opening bills and thinking the same thing: why did this cost jump so fast? It was not because the models were magical or because I was doing something wildly wrong. It was because I did not have a clear enough view of what I was spending while I was spending it. That was the spark for TokenBar. I wanted a tiny Mac app that sits there, shows token usage in real time, and makes the cost vi...

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DEV Community • 2026-04-21 12:03

The Agent Memory Design Nobody Talks About

Most agent systems fail not because the LLM is wrong, but because memory is an afterthought. We spend months tuning prompts and tool schemas, then stuff conversation history into a vector database and hope for the best. This is architectural malpractice. Memory is the hardest problem in agent engineering. Not tool calling. Not planning. Not even reasoning. Memory—because it touches everything, pe...

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Interesting Facts About Glossophobia.(Fear of Public Speaking) That Changed My Perspective
DEV Community • 2026-04-21 12:03

Interesting Facts About Glossophobia.(Fear of Public Speaking) That Changed My Perspective

DEFINITION According to Merriam-webmaster, Glossophobia simply means the fear of public speaking. It’s a type of social anxiety where a person feels nervous, anxious, or even panicked when speaking in front of others whether it’s a small group or a large audience. MY EXPERIENCE The first time I ever tried to speak in public was when I was 15 years old. I joined the children’s parliament in school...

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From Zero to Secure: Setting Up Azure Storage on My DevOps Journey
DEV Community • 2026-04-21 12:03

From Zero to Secure: Setting Up Azure Storage on My DevOps Journey

Everyone starts somewhere. The goal was straightforward: Create a secure, cost-effective storage account in Azure using the guided Lab which you can find on Microsoft Learn. Think of it as setting up a digital locker where your data lives safely in the cloud. Here is what I did, what I learned, and why it matters. Step 1: Creating a Resource Group Before building anything, I needed somewher...

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DEV Community • 2026-04-21 12:03

The Provider Pattern: How I Added Ollama Support in 50 Lines

When I started building spectr-ai, it only worked with Claude. The Anthropic SDK was hardcoded everywhere — in the analysis function, the prompt formatting, the response parsing. It worked, but it meant every user needed an Anthropic API key and an internet connection. I wanted to add Ollama support so developers could run audits locally, completely offline, using open-source models. The naive ap...

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DEV Community • 2026-04-21 12:01

Has anyone actually measured ROI on their AI spend?

Has anyone actually measured ROI on their AI spend? Not estimates. Not "we think it's working." Real numbers tied to something that actually changed. Every time I ask this, the same thing happens. Someone pulls up a slide with projections, or the conversation quietly moves on. I have been in enough of those rooms now that I have stopped being surprised by it, but I have not stopped thi...

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Hacker News • 2026-04-21 11:58

Show HN: VidStudio, a browser based video editor that doesn't upload your files

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🔥 7 Essential Tools Every Vue.js Developer Should Know 🚀
DEV Community • 2026-04-21 11:57

🔥 7 Essential Tools Every Vue.js Developer Should Know 🚀

Vue.js hit 6.4 million weekly npm downloads recently. The framework itself is solid. But the tools around it are what make you productive. Whether you're starting a new project or maintaining an existing one, the right set of libraries saves you hours of boilerplate and headaches. I've put together 7 tools that cover the full Vue developer workflow, from building and state management to testing a...

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9m read
Django: relaciones Muchos a muchos (many to many) entre modelos
DEV Community • 2026-04-21 11:55

Django: relaciones Muchos a muchos (many to many) entre modelos

Apuntes de programación en Español de Django: relaciones Muchos a muchos (many to many) entre modelos: https://raw.githack.com/manuelcanga/piensa-en-django/55e0965c9b8d45965efc16484bea61e5b26f9466/django_many_to_many--piensa_en_python-manuelcanga.html Repo github donde estoy colgando todas las guías: https://github.com/manuelcanga/piensa-en-django

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DEV Community • 2026-04-21 11:55

How to Optimize Font Loading for Better Web Performance (Free Font Resources Included)

How to Optimize Font Loading for Better Web Performance Custom fonts can slow down your website by 2-3 seconds if not optimized properly. Here's how to fix that. The Problem with Web Fonts Every custom font adds: HTTP requests Render-blocking resources FOIT (Flash of Invisible Text) Increased page weight Solution: Font Loading Strategies 1. Use font-d...

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DEV Community • 2026-04-21 11:54

How a DeepSeek-only agent framework hit 85% prefix cache rate (and saved 93% vs Claude)

I've been running DeepSeek behind LangChain for a few months for a side project. Worked fine, except one day I noticed something weird: DeepSeek's pricing page advertises cached input tokens at ~10% of the miss rate, but my bills didn't reflect that at all. I dug in. The cache is byte-prefix based. The moment your request's prefix differs from the previous one by even a single character, yo...

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7m read
DEV Community • 2026-04-21 11:53

FastAPI at 1M+ users: the patterns that actually matter

FastAPI is the default Python web framework in 2026 — 38% of Python teams ship on it, up from 29% a year ago. That means a lot of greenfield projects are making the same early mistakes. This post is what I wish I'd known before scaling Savyour (Pakistan's first cashback platform, 1M+ users, 300+ merchant integrations) from 50 RPS to 3,000+ RPS on FastAPI. Everything below is drawn from productio...

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DEV Community • 2026-04-21 11:53

Tunneling Out of the Air-Gap: Software Data Diodes for Industrial IoT

IT InstaTunnel Team Published by our engineering team SaaS on a Laptop: Monetizing Local AI Models with Token-Gated Tunnels SaaS on a Laptop: Monetizing Local AI Models with Token-Gated Tunnels You don’t need a cloud server to sell API access. Here’s how to wrap your local Python script in a token-gated tunnel that charges users $0.01 per request — before the traffic ever touches your machine. In...

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