Posts about Tutorials

September 24, 2026

11 min read

RFC, CURP, CLABE and NSS: the Mexican ID Validation Algorithms, Explained with Worked Examples

Mexico Validation TypeScript Algorithms Fintech

Typographic cover: the word RFC above a diff, GODE561231GR with a missing check digit in red and GODE561231GR8 in green, and the sum 1026 mod 11 = 3, 11 − 3 = 8

September 11, 2026

10 min read

Validate Mexican RFC, CURP and CFDI Invoices from Claude, With No API Keys

MCP Claude CFDI Mexico TypeScript AI Agents

Typographic cover on a dark green grid: RFC · CFDI in large serif letters, a validate_rfc call on XAXX010101000 showing check_digit_satisfied false and is_generic true, and the npx command for mx-fiscal-mcp-server

September 8, 2026

15 min read

Ollama on an AMD GPU: Five Failures That Drop You to CPU Without Telling You

AI Ollama AMD GPU Local LLM ROCm

Typographic cover on a terminal background: the word Ollama above a two-line diff, "- library=cpu 15.89 tok/s" in red and "+ library=Vulkan 132.48 tok/s" in green

August 15, 2026

48 min read

How to Learn to Code From Scratch in 2026: The Complete Guide

Programming Python Beginners Tutorial AI Career JavaScript

A beginner's desk setup for learning to code in 2026: a code editor with Python, a terminal window, and an AI assistant panel to the side

9 min read

How to calculate age or the days between two dates without being off by one

Dates Age Calculators Excel JavaScript Tutorial

15 min read

The Complete Docker Guide for 2026: Containers, Dockerfile and Compose

Docker DevOps Containers Tutorial Best Practices

3D illustration of a whale carrying stacked containers next to a terminal window: the complete Docker guide for 2026

6 mins read

How to Install PHP on Windows in 2026: 5 Easy Options (Herd, XAMPP, WAMP, Docker, WSL2)

PHP Windows Herd WAMP XAMPP Docker WSL2

February 17, 2023

3 mins read

How to Fix the Orange Icon in WampServer (Windows): Step-by-Step Guide

WampServer Windows Apache MySQL Local Server

WampServer system tray icon displayed in orange, indicating a service is down

February 13, 2023

2 min read

How to Fix the "Specified Key Was Too Long" Error in Laravel (3 Solutions)

Laravel MySQL MariaDB Migrations Errors

MySQL "Specified key was too long" error message in the Laravel console during migrations

February 11, 2023

4 mins read

How to Install Node.js (npm) on Windows, macOS and Linux: 2026 Guide with nvm, fnm and Volta

Node.js NPM pnpm Bun nvm fnm Volta Windows Mac Linux

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