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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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How the Brazilian CPF Validation Algorithm Works in JavaScript (Step-by-Step)

How the Brazilian CPF Validation Algorithm Works in JavaScript (Step-by-Step)

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2 min read
Kafka Doesn't Know Who Owns Your Topics.

Kafka Doesn't Know Who Owns Your Topics.

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4 min read
Cutting OpenAI Costs From Scratch: What Nobody Tells You

Cutting OpenAI Costs From Scratch: What Nobody Tells You

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9 min read
DESIGN.md, CLAUDE.md, AGENTS.md: The Agent-Context File Family

DESIGN.md, CLAUDE.md, AGENTS.md: The Agent-Context File Family

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2 min read
The DESIGN.md CLI: lint, diff, export and spec

The DESIGN.md CLI: lint, diff, export and spec

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2 min read
DESIGN.md vs tokens.json vs Figma for AI Agents

DESIGN.md vs tokens.json vs Figma for AI Agents

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2 min read
DESIGN.md Anatomy: How Tokens and Prose Work Together

DESIGN.md Anatomy: How Tokens and Prose Work Together

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2 min read
How I built a simple AI router to avoid vendor lock-in and costs

How I built a simple AI router to avoid vendor lock-in and costs

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4 min read
How I Used AI to Simulate Realistic Coding Interviews

How I Used AI to Simulate Realistic Coding Interviews

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5 min read
CSAPP Chapter 9: Virtual Memory - Deep Reference

CSAPP Chapter 9: Virtual Memory - Deep Reference

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17 min read
The Bilingual Developer: Python and Go, The Error Handling Paradigm

The Bilingual Developer: Python and Go, The Error Handling Paradigm

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8 min read
Headless Mode on NVIDIA Jetson AGX Orin 64GB with JetPack 7.2

Headless Mode on NVIDIA Jetson AGX Orin 64GB with JetPack 7.2

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10 min read
I Cut My AI Bill From $400 To $28 — Freelancer Breakdown

I Cut My AI Bill From $400 To $28 — Freelancer Breakdown

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7 min read
Parsing and Rebuilding EPUB Files in Python: Lessons Learned

Parsing and Rebuilding EPUB Files in Python: Lessons Learned

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5 min read
How I Stopped Fighting Hallucinations in LLM Data Extraction

How I Stopped Fighting Hallucinations in LLM Data Extraction

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5 min read
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