1.5 Set up your editor before going further

Spend ten minutes here and the next two hours of language learning go three times faster. We set up nixfmt for formatting and nixd as your language server — autocomplete, jump-to-definition, and inline errors — in VS Code, Neovim, Emacs, or JetBrains. The viewers who skip this step always come back to it, usually after some avoidable frustration.