01
Interactive companion
Runnable examples and guided exercises for all 26 chapters, with one-click launches into the QF Code editor.
Underneath the Syntax
Resources for the book.
The companion, QF Code, references, downloads, and official corrections for Underneath the Syntax.
02
QF Code
The browser IDE used by the companion and the complete version 1.1 language specification.
03
Errata and references
Official corrections, edition notes, and supporting references maintained for the published book.
04
Downloads
Download the QF Code specification in Markdown and the companion example library used by the browser IDE.