All 17 core coding interview patterns. Sorted by commonality × difficulty — most frequent and easiest patterns first, rarest and hardest at the bottom. For each: how to spot it, the core idea, a clean code example, and LeetCode practice problems.

Frequency: ★★★★★ | Difficulty: Easy

A pattern for building personal knowledge bases using LLMs.

This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you.

Most people's experience with LLMs and documents looks like RAG: you upload a collection of files, the LLM retrieves relevant chunks at query time, and generates an answer. This works, but the LLM is rediscovering knowledge from scratch on every question. There's no accumulation. Ask a subtle question that requires synthesizing five documents, and the LLM has to find and piece together the relevant fragments every time. Nothing is built up. NotebookLM, ChatGPT file uploads, and most RAG systems work this way.

日本語で技術的な原稿（書籍の章、記事、解説文）を書く・推敲するときは、以下の規範に従う。

I have compiled all the resources that helped me in my GATE preparation, and I hope they help you too! 🚀

Planning workspace for material lists, cost comparisons, and project notes.

Renovation Ledger collects personal material lists, repair-scope comparisons, expected costs, and completed-project notes.

In this tutorial, we will install and use a full GNOME Desktop environment in WSL2, without any external software. The only requirement is a working WSLg installation. At the moment, the instructions are only for Ubuntu (20.04, 22.04 and 24.04) distros and GNOME, but you can request me to test other distros and desktop environments.