🎓 Learn X

Learn retrieval augmented generation by building the simplest RAG: chunk your project docs, rank them with SQLite FTS5 and BM25, and hand an LLM a cited prompt.

Learn SQL with sqlite3: filter, join, group, and rank rows, read a query in execution order, and use EXPLAIN to find out why a query is slow.

Learn agile: the manifesto values, Scrum and Kanban basics, retrospectives, and the trust-first habits that keep Scrum Masters and coaches useful.

Learn platform engineering fast: internal developer platforms, platform-as-a-product thinking, golden paths, AI coding agents, and why platforms fail.

Learn AWS Lambda: create, invoke, and delete a Python function with the AWS CLI, and understand cold starts, invocation types, concurrency, and cost.

Learn fd, the fast find alternative: search by name, regex, and glob, filter by type and depth, respect .gitignore, and run commands on results.

Learn zsh fast: glob qualifiers, parameter expansion, arrays, completion, history, options, key bindings, and .zshrc, plus a verified command reference.

Learn Nushell fast: tables and pipelines, JSON, CSV, and TOML files, records, lists, custom commands, and config, plus a searchable command reference.

Learn tmux fast: sessions, windows, panes, the prefix key, and .tmux.conf, plus a searchable command reference and curated videos, podcasts, and books.

Learn Mermaid in 15 minutes: the flowchart and sequence diagram syntax that covers most work, plus the best videos, books, and docs to go deeper.

Learn HTTP status codes with five mental models: a mnemonic for all five classes (1xx-5xx), the codes you'll meet most, and how to read them with curl.

Learn Amazon EMR basics for big data processing in the cloud. Discover the primary use cases, core concepts, and resources to get started.

Learn Amazon IAM fundamentals for secure access management in AWS. Discover the core concepts, best practices, and resources to master this essential security service.

Learn Amazon S3 basics for scalable object storage in the cloud. Discover the primary use cases, core concepts, and resources to get started with this essential AWS service.

Learn Neovim by practicing in real Neovim in your browser, then set up plugins with vim.pack, lazy.nvim, or LazyVim. Includes a searchable command reference.

Let's learn about software architecture. We'll discover is use cases. Then we'll dive into common architectures, diagrams, and frameworks.

Learn Asymptotic Notations to estimate, communicate, and optimize the efficiency and performance of algorithms.

Learn Kubernetes basics to navigate the high digital seas. No acronyms, no buzzwords, no bullshit.

Learn EC2 basics and the primary topics you need to know when getting started with the Amazon EC2 service. Discover the primary use cases and more.

Learn Java Coding Challenges to level up and ace your next interview. Practice makes perfect, so let's do it!

Learn Rendanheyi to rethink how you run your business in the world of constant change. Do you need a micro-enterprise?

Learn Amazon ECS; Simplify your container workloads with Amazon's managed Docker solution.

jq use cases and a tested cookbook for parsing JSON: when to reach for jq, select and filter, reshape objects, group and sum, and convert JSON to CSV.

Learn 3D Graphics to supercharge your web application development. Let's explore the basics of 3D graphics and get started today.