Functional Programming - 22: Functor

Описание к видео Functional Programming - 22: Functor

In Functional Programming, Functor is simply a structure that can be mapped over. The concept is borrowed from Category Theory. In Category Theory, Functor is a mapping between Categories.

This mapping involves:
mapping of objects (types)
mapping of arrows (functions)

It should also:
preserve composition law
preserve identity law

In this Video:
Functor
Endofunctor
Option Functor
List Functor
Either Functor

Links:
Category Theory by Bartosz Milewski -    • Category Theory 6.1: Functors  

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