Understanding Functor
Functor represents a data structure or context that can be mapped over. It provides a way to apply a function to the values inside that context while preserving the structure of the context itself.
In simpler terms: Functor allows you to transform the values inside a container without changing the type of the container. For example, you can convert a List[Int] into a List[String] by applying a function to each element of the List.
The Functor type class in Scala Cats provides a way to perform these kinds of transformations. It defines a single method map that takes a function A => B and a container of type F[A] and returns a new container of type F[B] with the function applied to each value inside.
Cats provide Functor instances for common data types like Option, List, Either, and more. It also allows you to define Functor instances for custom data types.
Example:
System Engineer in Tata Consultancy Services,Ex-Appening,Ex-Binary semantics.
8 个月Well said!