I 10.2 · Monoid in the category of endofunctors

- 视频：https://www.youtube.com/watch?v=GmgoPd7VQ9Q

- 状态：已看完；旧观看笔记待逐步整理

- 关联：Bartosz Milewski Category Theory 视频笔记 category_theory @Category Theory for Programmers