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Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
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Custom GPTs vs plain chat
Part 2 of ChatGPT product map. When a Custom GPT earns its keep versus plain chat: saved instructions, knowledge files, plan limits on creating GPTs, and why a…
What is Claude Code, and when should you use it?
Part 2 of Claude product map. What Claude Code is for when you will touch a project: explore a repo, edit many files, run tests, and open PRs,…
Pandas DataFrames explained: rows, columns, and column types
A pandas DataFrame is just a table with rows, columns, and types you can inspect. Learn to load a CSV, check shape and dtypes, rename columns, and map…
Which ChatGPT mode should you use: Chat, Work, or Codex?
Part 1 of ChatGPT product map. Plain English on Chat, Work, and Codex: what each mode is for, how usage differs, and a chooser you can use before…
How Claude’s chat app differs from Claude Code, Cowork, and the API
Part 1 of Claude product map. A plain-English tour of Claude chat versus Code, Cowork, Design, Science, and the API Console so you know which door to open…
