One of the most interesting talks among the ones I attended in lambda.world was Functional Lenses in JavaScript by FlavioCorpa. He talked about Functional Lenses in a practical way; what’s more, he started with his own small implementation (not for production), and then he talked about different libraries like Ramda or Monocle-TS.
The talk started with an easy-to-understand definition for those of us who are familiar with the procedural/imperative programming: “Lenses are basically functional getters and setters”. Basically, what we get with Lenses is the ability to reuse the data access of a structure in a modular and immutable way, either to obtain the data or to modify it. Later, we will see examples to better understand it.