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#tutorial

Tutorial is a general purpose tag. We welcome all types of tutorial - code related or not! It's all about learning, and using tutorials to teach others!

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Your First BIN Lookup Integration in Python (With Real Fraud Use Cases)

Your First BIN Lookup Integration in Python (With Real Fraud Use Cases)

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9 min read
How to Prompt AI Tools to Write Accurate SQL Queries (And Why Most Developers Get This Wrong)

How to Prompt AI Tools to Write Accurate SQL Queries (And Why Most Developers Get This Wrong)

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6 min read
Writing a Regex Playground in 200 Lines of Rust

Writing a Regex Playground in 200 Lines of Rust

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9 min read
Writing a YAML Linter in Rust Because YAML Is Secretly Terrible

Writing a YAML Linter in Rust Because YAML Is Secretly Terrible

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11 min read
Writing a tar Inspector in Rust with Three Dependencies

Writing a tar Inspector in Rust with Three Dependencies

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9 min read
How to Monitor Server Performance with Free Tools

How to Monitor Server Performance with Free Tools

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8 min read
A Tiny PHP Invoice-PDF API: Slim 4, dompdf, and the JPY Rounding Footgun

A Tiny PHP Invoice-PDF API: Slim 4, dompdf, and the JPY Rounding Footgun

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9 min read
Hackeo con IA: Claude Fue Usado para Robar Datos del Gobierno de México en 2026

Hackeo con IA: Claude Fue Usado para Robar Datos del Gobierno de México en 2026

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8 min read
sharp on Alpine Without Tears: a 260 MB Image Resize API in Hono

sharp on Alpine Without Tears: a 260 MB Image Resize API in Hono

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9 min read
A 10 MB Markdown-to-HTML Service in Rust with pulldown-cmark

A 10 MB Markdown-to-HTML Service in Rust with pulldown-cmark

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9 min read
Parsing Prisma Schema By Hand: A 300-Line CLI That Emits Mermaid ER Diagrams

Parsing Prisma Schema By Hand: A 300-Line CLI That Emits Mermaid ER Diagrams

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10 min read
Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

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10 min read
Seed Data Without a Dependency Tree: A Tiny PHP CLI Instead of Faker

Seed Data Without a Dependency Tree: A Tiny PHP CLI Instead of Faker

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10 min read
Describing Cron Expressions: Why Templates Don't Work, and What Does

Describing Cron Expressions: Why Templates Don't Work, and What Does

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8 min read
Discord Slash Commands Without an SDK: ed25519 in 250 Lines of TypeScript

Discord Slash Commands Without an SDK: ed25519 in 250 Lines of TypeScript

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10 min read
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