You’ll find here a walkthru of what will eventually be all the glyphs in Dyalog APL, in an order where no glyph is used in an example until it’s been introduced. So far there’s no prose – the explanations are purely through examples for now (but we’ll add prose later).

This is for study of programming in array languages such as APL 502, J 48, BQN 55, and K 44, as well as array-oriented features of other languages and notation such as einstein notation, numpy broadcasting, mathematica’s threaded 38. We may even get into discussions of combinatory logic 63.

APL Thinking, Array-Oriented Programming and Notation as a Tool of Thought are terms used so often that they start to feel like buzzwords. In this high-level introduction to array programming, we explore these concepts and start to see if any practical advice can be found among the pontifications.