Bottom-up, data-oriented design in Clojure

ClojureTV · Talk · 37 min · 2015 · YouTube title: Bottom Up vs Top Down Design in Clojure - Mark Bastian

Why it's here

HN repeatedly recommends it as the talk that made data-oriented, REPL-driven bottom-up design click.

What it covers

Mark Bastian contrasts top-down object-oriented design with bottom-up, data-oriented design in Clojure. He models a board game as plain data plus small composable functions and compares it with a roughly 22-class OOP version.