I was listening to a seminar at FEconf and was so entranced by the eloquence of the speaker that I overheard someone recording the lecture during the seminar. I looked it up and finally completed this lecture. I still don't fully understand it and I feel like it's lacking, so it's hard to apply it to work or personal projects right away, but I'm curious because I've become interested in functional programming and have opened my eyes to a new path! I'll pay for the next lecture video and continue studying and researching its application. Thank you very much.