It’s made entirely in Clojure/ClojureScript of course 😉 the dataset/website, I mean, not the poster.

Hah, that's funny, I recognize the room Alex is in. Frederik tried his hand at one of the guitars 🙂 Ages ago, it seems.

Aha, it’s inside the Cognitect offices?

Very interesting indeed

@U4P4NREBY yeah 🙂 Near the well-stocked kitchen 😄

hmmm, there is said on the stream that functional interface have only one method. That's a tricky thing to say. There can be still be numerous default methods (defined on interface). I don't think there is a problem with this, as ^[FunctionalType] syntax is type checkable. Example: functional interface java.util.function.Function<T, R> has abstract method apply(T t) but it also has 2 default methods: • andThen(...not important...) • compose(...) My brain a bit hurts about this So the "only method" needs to be non-default, or rather abstract (overridable). Tricky here is that default methods can also be "overriden". My brain hurts really. They call it even "Defender methods". It's a mechanism how a lot of functionality was retrospected in Java 8. I guess it's "simple" to recognise the single abstract method (not default) so implementation wise no disaster happen. I said twice already, my brain hurts.

Off topic question: which markdown presentation tool is Alex using?