Hands-On Category Theory by James Earl Douglas.

From the webpage:

James explores category theory concepts in Scala REPL. This is the first version of the video, we have a separate screen capture and will publish a merged version later, with a reference here.

I don’t often see “hands-on” and “category theory” in the same sentence, much less in a presentation title. ðŸ˜‰

An interesting illustration of category theory being used in day to day programming.

See: Hands-On Category Theory at Github for notes on the presentation.

Perhaps this will pique your interest in category theory!