Notation as a Tool of Thought
For those unfamiliar with the power of APL, see this demo of someone livecoding the Game of Life: <a href="https://www.youtube.com/watch?v=a9xAKttWgP4" rel="nofollow">https://www.youtube.com/watch?v=a9xAKttWgP4</a><p>Its modern descendent are <a href="https://en.wikipedia.org/wiki/J_(programming_language)" rel="nofollow">https://en.wikipedia.org/wiki/J_(programming_language)</a> &  <a href="https://en.wikipedia.org/wiki/K_(programming_language)" rel="nofollow">https://en.wikipedia.org/wiki/K_(programming_language)</a>.