Literate documents

Worked examples written in Org mode: prose and X_eTaL blocks, each block run by xetal through ob-xetal in Emacs and its result recorded under it.

• Start here: X_eTaL in fifteen minutes
  from typing ASCII to importing a library, run as you read
• A literate tour of X_eTaL
  every feature of the language, run as you read
• Hello, library
  writing a library of your own, and using it
• Life in one line
  Conway's Game of Life in X_eTaL, built up a piece at a time
• Libraries
  what a library is, and the standard libraries at work
• The aviary: combinators in X_eTaL
  Raymond Smullyan's birds as a library, run as you read
• Trains and birds
  two ways to compose functions without naming the argument
• TTTML: a machine that learns tic-tac-toe
  learning by playing itself, in X_eTaL
• Classic APL programs, drawn
  Pascal's triangle, Life and turtle graphics in X_eTaL, with their pictures
• The Tower of Hanoi, three ways
  recursion, currying with combinators, and every move at once
• Swimming ducks
  animation by rotate, and joining frames along an axis two ways
• Macros: source that writes source
  the system macros, seeing an expansion, and macro libraries of your own
• Some FinnAPL idioms in X_eTaL
  historical APL idioms re-expressed as typed, extensible array programs

XeTaL in LaTeX: every line of code we ship or document, as xetal render --latex writes it and KaTeX draws it.

The Org sources are in the repository's docs/literate/, with the Emacs mode and ob-xetal in docs/emacs/.

Live demo · Repository