Talking about Transforming Operators in RxSwift.

Discussing toArray, map, flatMap, compactMap, flatMapLatest, materialize and dematerialize operators.

The book by Ray Wenderlich acts as a complete guide toward learning and mastering reactive programming and asynchronous programming. This is currently using Swift 5.1 and iOS 13.

Links:

Step Into Swift: https://www.stepintoswift.com/

https://www.raywenderlich.com/books/rxswift-reactive-programming-with-swift

https://rxmarbles.com/