B-trees and database indexes — PlanetScale

B-trees are used by many modern DBMSs. Learn how they work, how databases use them, and how your choice of primary key can affect index performance.

Caching — PlanetScale

Every time you use a computer, the cache is working to ensure your experience is fast.

GitHub - mailhog/MailHog: Web and API based SMTP testing

Web and API based SMTP testing. Contribute to mailhog/MailHog development by creating an account on GitHub.

How to Secure Environment Variables for LLMs, MCPs, and AI Tools Using 1Password or Doppler

Stop hardcoding API keys in MCP configs and AI tool settings. Learn how to use 1Password CLI or Doppler to inject secrets just-in-time for Claude, Cur...

Java, Maven, & Gradle: OS Setup & Project-Level Usage

Install Java, Maven, Gradle at OS & project levels. Learn common commands for consistent builds & development workflows.

Adding a GitHub Contribution Graph to Next.js

How to add a GitHub contribution graph to your Next.js site using GitHub's GraphQL API, with server-side caching.

Apple Maps Java SDK

Java SDK for Apple Maps Server API — geocoding, search, directions

Troubleshooting Java, Second Edition

Laurentiu Spilca

Learn how to quickly work out what your Java code is doing so you can understand when and why it misbehaves. Searching for bugs, detangling messy lega...