☕ on the menu · Reference

The Knowledge Base.

Clear, modern explainers for the fundamentals — written to be read once and remembered. This is the “KB” in KB Cafe: references that feed straight into the matching tools.

Concepts

Object-Oriented Programming concepts

Encapsulation, abstraction, inheritance, polymorphism — the four pillars, explained with examples.

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Concurrency

Multithreading & concurrency explained

Threads vs processes, race conditions, locks, deadlocks, and how to write thread-safe code.

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Memory

Memory leaks explained

What a memory leak is, the common causes across languages, and how to find and prevent them.

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More on the way

KB Cafe’s reference shelf is being rebuilt from its long history as a developer resource — evergreen topics first (encoding, concurrency, memory), each rewritten for how we build today. Need a tool instead? The menu has the Base64 encoder, JSON → TypeScript, JWT decoder, and cron generator.