See http://blog.ploeh.dk/2017/10/04/from-design-patterns-to-category-theory/ http://blog.ploeh.dk/2017/10/04/from-design-patterns-to-cate... and https://github.

See http://blog.ploeh.dk/2017/10/04/from-design-patterns-to-category-theory/ http://blog.ploeh.dk/2017/10/04/from-design-patterns-to-cate... and https://github.com/hmemcpy/milewski-ctfp-pdf https://github.com/hmemcpy/milewski-ctfp-pdf