Read the abstract ➤ https://www.conf42.com/Python_2024_Chaur_Wu_functor_zoo Other sessions at this event ➤ https://www.conf42.com/python2024 Join Discord ➤ https://discord.gg/DnyHgrC7jC Support our mission ➤ https://www.conf42.com/support Chapters 0:00 intro 0:20 preamble 0:31 about this talk 1:06 about me 1:21 agenda 1:32 a function 1:58 another function 2:16 category of types (t) 3:01 list of numbers 3:27 clist of numbers 4:01 clist is a functor 4:49 io side effects 6:06 io functor 6:58 partial function 7:37 not very composable 8:15 option for better composability 9:01 option is a functor 9:18 composing functors 10:26 category od small categories 10:44 example of clist . option 11:31 covariant functor in general 12:07 contravariant functor 12:43 predicate is a contravariant functor 13:24 closed category 15:58 applicative functor is lax closed functor 16:22 example of applicative functor 17:29 bifunctor 18:47 example of bifunctor 19:38 profunctor 21:05 forget 21:16 star and costar 21:44 example of star profunctor 22:57 summary