Intro to functional ViewModels with SwiftUI and Combine

SwiftUI’s declarative nature requires developers to rethink the way we architect our apps. We’ll start at the beginning with a simple publisher and to learn how we can lift the mutable state out of our apps and sequester it inside of an immutable pipeline of values and functions and then we’ll apply what we’ve learned by refactoring a simple imperative SwiftUI app by lifting its state into a stateless declarative immutable functional view model.