Romain Revol rrevol

Category theory jargon cheat sheet

A primer/refresher on the category theory concepts that most commonly crop up in conversations about Scala or FP. (Because it's embarassing when I forget this stuff!)

I'll be assuming Scalaz imports in code samples, and some of the code may be pseudo-Scala.

Functor

A functor is something that supports map.

	import AVFoundation
	import Foundation



	// The single FM synthesizer instance.
	private let gFMSynthesizer: FMSynthesizer = FMSynthesizer()

	public class FMSynthesizer {