DEV Community • 2026-07-29 06:09

How a Grocery Store Conversation Inspired Me to Build a Hindi–Malayalam–English Translator in Flutter

How a Grocery Store Conversation Inspired Me to Build a Hindi–Malayalam–English Translator in Flutter Hi everyone I'm a Flutter developer from Kerala, and I'd like to share the story behind one of my recent projects. Unlike many project ideas that begin with brainstorming or hackathons, this one started with a simple everyday situation. One day I was standing in a grocery store. A c...

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DEV Community • 2026-07-29 06:06

NGINX, Actually Explained: Architecture, Config, and the Mental Model That Makes It Click

Most people meet NGINX as a magic file they copy-paste until the 502 goes away. This post is the opposite: a tour of the model behind that file, drawn straight from the official docs at nginx.org/en/docs. Once the model clicks, the config stops being scary. Why NGINX is fast (and why the answer matters) Classic web servers spawn a process or thread per connection. That's fine at 200 co...

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8m read
DEV Community • 2026-07-29 06:02

Selenium with Python: The Ultimate Guide to Web Automation Testing

Introduction : In today's fast-paced software development world, delivering high-quality applications quickly is a top priority. Manual testing is effective for small projects, but as applications grow larger and more complex, it becomes time-consuming and error-prone. This is where Selenium comes into the picture. Selenium is one of the most popular open-source automation testing tools used for...

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4m read
DEV Community • 2026-07-29 06:00

Building a Secure Local AI Agent on Open-Source Infrastructure: Lessons from SGLang, Olares, and Real-World Audits

Originally published on tamiz.pro. The promise of Local AI is data sovereignty. By running Large Language Models (LLMs) entirely on-premise, organizations eliminate the risk of proprietary data leaking to third-party APIs. However, "local" does not automatically mean "secure." In fact, a poorly configured local LLM stack can expose your infrastructure to sophisticated attack vectors, including pr...

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6m read
DEV Community • 2026-07-29 06:00

How to Set Up a Professional Python Development Environment

How to Set Up a Professional Python Development Environment tags: python, tools, productivity, beginners tags: python, tools, productivity, beginners How to Set Up a Professional Python Development Environment You’ve written your first print("Hello, World!"), but now you’re staring at a messy terminal, conflicting package versions, and code that breaks every time you ...

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DEV Community • 2026-07-29 06:00

Build a Finance Tracker App with Python and SQLite

Build a Finance Tracker App with Python and SQLite tags: python, finance, sqlite, tutorial tags: python, finance, sqlite, tutorial Build a Finance Tracker App with Python and SQLite You know that frustrating moment when you check your bank account and wonder, “Wait, where did all my money go?” Instead of scrolling through endless spreadsheets or paying for expensive s...

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5m read
DEV Community • 2026-07-29 06:00

Smart Traffic Systems: Configuring Flow for a Smarter City

Smart Traffic Systems: Configuring Flow for a Smarter City Ever found yourself stuck in a gridlocked intersection, wondering why the lights aren't cooperating? Or perhaps you've mused about the sheer inefficiency of fixed-timer traffic signals in a dynamic urban landscape. As developers, these aren't just annoyances; they're ripe problems begging for intelligent solutions. And that's wh...

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3m read
DEV Community • 2026-07-29 06:00

Python Abstract Base Classes: Design Patterns

Python Abstract Base Classes: Design Patterns tags: python, oop, tutorial, programming tags: python, oop, tutorial, programming You’ve probably written code that “mostly works” until a new subclass forgets to implement a critical method, causing a cryptic error deep in production. That’s the exact pain point Python’s Abstract Base Classes (ABCs) solve—but when paired with smart ...

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5m read
DEV Community • 2026-07-29 06:00

Build a Browser Automation Tool with Selenium

Build a Browser Automation Tool with Selenium tags: python, selenium, automation, tutorial tags: python, selenium, automation, tutorial Build a Browser Automation Tool with Selenium Imagine you have to log into ten different websites, fill out the same form, click a confirmation button, and download a report. You could do it manually in an hour, or you could write a s...

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6m read
DEV Community • 2026-07-29 06:00

Unified Social Media API vs Native Platform APIs

A unified social media API gives an application one publishing interface across multiple networks. Native platform APIs provide direct access to each provider's models, permissions, and newest features. Neither is automatically the better architecture. A unified layer usually fits when breadth, consistent scheduling, and reduced OAuth maintenance matter more than immediate access to every provider...

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9m read
DEV Community • 2026-07-29 06:00

Implementing JWT Refresh Token Rotation for Video API Clients

A refresh token leaked out of one of our Android TV clients last winter. Not through a server breach — through a rooted device running a sideloaded build that logged every HTTP header to a public Discord channel. The access token in that dump expired in fifteen minutes and nobody cared. The refresh token was valid for thirty days and could mint a fresh access token on demand. For a service like V...

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14m read
DEV Community • 2026-07-29 05:57

Building a Public Backlog of AI Agent Failures: What's the Worst Thing Your Tests Didn't Catch?

Not looking for a highlight reel of prompt injection screenshots, more interested in the mundane stuff: the agent that called the wrong tool with confidently valid-looking arguments, the multi-turn conversation that drifted somewhere nobody planned for by turn six, the endpoint that worked fine in every test case and then did something strange the first week it saw real traffic. If you've shipped...

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1m read
DEV Community • 2026-07-29 05:41

A Green Architecture Test Can Still Miss the Bug

Architecture tests are useful because they turn a design decision into executable feedback. They can stop old failure modes from quietly returning as a codebase grows. But there is a subtle failure mode in the tests themselves: the detector can be correct while discovery is incomplete. I recently reviewed a .NET guard added after an async background job disposed a dependency-injection scope sync...

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5m read
DEV Community • 2026-07-29 05:39

From Web2 to Agentic Commerce: The 8 Components Nobody Explains Until You're Live

If you've ever built an e-commerce store, you know the drill: storefront, hosting, payment gateway, inventory, shipping, support, security, and analytics. Miss one — and the whole thing breaks. That framework works for human commerce. But what about commerce for AI agents? Over the past few months, I've been building AgentShare — an MCP server that provides Solana DeFi data to autonomous AI ag...

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3m read
DEV Community • 2026-07-29 05:39

A JSON DSL Doesn't Make Your Rules No-Code. It Just Moves the Code Into JSON.

The pitch is always the same: wrap business logic in a JSON schema, let non-engineers edit the JSON through a form, and now product or ops can change a rule without a deploy. It's a good instinct. It's also where most teams stop thinking about the problem, right at the point where the actual engineering work starts. A JSON DSL isn't a no-code layer by default. It's a second programming language y...

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9m read
DEV Community • 2026-07-29 05:39

# Designing for Graceful Degradation in Industrial AIoT Systems

Industrial AIoT systems can't afford to fail completely when a component breaks. A construction site's access control system that goes offline when the cloud connection drops is worse than no system at all — it either blocks all workers from entering or lets everyone through unchecked. The right design is graceful degradation: the system continues to provide reduced but still useful functionality ...

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3m read
DEV Community • 2026-07-29 05:39

Compute portfolio risk metrics (Sharpe, beta, correlation) via a free API - in JS and Python

`--- title: "Compute portfolio risk metrics (Sharpe, beta, correlation) via a free API — in JS and Python" published: false description: "Stop re-deriving Sharpe, Sortino, beta, alpha, drawdown, correlation and rebalancing. Send your price series to one endpoint and get the numbers back — with copy-paste JavaScript and Python." tags: javascript, python, api, tutorial If you've ever bui...

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4m read
DEV Community • 2026-07-29 05:37

Clean State Machines in Java 22+: Stop Polluting Scope with JEP 456 Unnamed Patterns

Clean State Machines in Java 22+: Stop Polluting Scope with JEP 456 Unnamed Patterns High-throughput event loops in modern Java microservices are regularly bogged down by variable scope pollution and bloated payload handling during domain state transitions. If you are still binding unused record components in nested patterns, you are cluttering your code and bypassing compiler optimizat...

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2m read
DEV Community • 2026-07-29 05:36

How Claude's Context Window Actually Works: A Deep Dive

Claude's context window is a game-changer for AI development, but how does it really work? We'll dive into the details and explore what this means for your AI projects. Introduction to Claude's Context Window The context window is a critical component of Claude's success, but its inner workings are often misunderstood. To understand why the context window matters, let's first define wh...

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𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-07-29 05:34

Mousecrack - Bypass agent cursor detection with deep learning.

submitted by /u/Possible-Session9849 [link] [comments]

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