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Tutorials

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02:35
2026-05-23
dev.to
startups

How I Built a Pakistan Internet Speed Test Platform at 16

A 16-year-old developer built a Pakistan-focused internet speed testing platform called wifispeedtestpk.com while learning SEO and frontend development. The site features dedicated ISP pages for providers like PTCL, Naya…

14:57
2026-05-22
dev.to
developer-tools

Fastest Way to Understand Stryker

The article provides a step-by-step guide to setting up a .NET solution with a console app, class library, and xUnit test project, then demonstrates how to install and run the Stryker mutation testing tool. It shows how …

14:51
2026-05-22
dev.to
machine-learning

I Finished Machine Learning. And Then Changed The Plan.

The author completed a self-directed Machine Learning roadmap, building projects like a customer churn prediction model and learning from mistakes such as data leakage and overfitting. However, after finishing the ML roa…

12:30
2026-05-22
theunwindai.com
ai-agents

Stop giving agents the whole computer

GitHub open-sourced Spec Kit, a toolkit that forces AI coding agents to create a structured specification before writing any code, requiring them to ask clarifying questions and plan architecture first. The release follo…

12:14
2026-05-22
gist.github.com
developer-tools

Prompt for AI agent to act as a Lean mentor

This article provides instructions for an AI agent to act as a Lean 4 mentor for an experienced software engineer with a math background. It emphasizes building a correct mental model of Lean as an interactive semantic e…

10:18
2026-05-22
dev.to
artificial-intelligence

AI code review checklist that actually catches problems

AI-generated code, while often appearing polished and correct during review, introduces a new class of bugs stemming from missing contextual assumptions about real-world production environments. It notes that studies sho…

00:00
2026-05-22
example42.com
ai-agents

Reading the Swamp

A developer spent two days wrestling with the Swamp automation tool for AI agents, first getting stuck on a naming bug that has since been fixed, then reading the manual to understand its architecture. The tool provides …

22:23
2026-05-21
dev.to
developer-tools

The Scoped Singleton DI Bug Your AI Just Suggested

Common software bug where a Scoped service (like `OrderService`) caches an entity from a Scoped `DbContext` into a Singleton service (like `IMemoryCache`). This causes data corruption and crashes in production because th…

21:16
2026-05-21
gist.github.com
developer-tools

Video Modification Simplified

The article describes **vid.py**, a Python command-line tool that acts as a simplified wrapper around ffmpeg for common video tasks. It provides functions for parsing timecodes, estimating video duration by probing input…

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