That’s a great question! And actually one I asked myself too, when I just got started with Combine. Let’s first explain what PassthroughSubject and CurrentValueSubject are though. Subjects are a kind of publisher that you can subscribe to, but can...
In JavaScript-world, it's really easy to know when multiple promises completed: just use Promise.all. How do you do the same thing in Combine?
With SwiftUI we have the @Binding property wrapper that makes it really easy to create a two-way databinding between a form field and a model, but in the UIKit world it's slightly less easy. Let's explore some solutions.
It's almost exactly 10 years since I wrote my last book review. Time flies! Also, it makes me realize that the way I've been learning has changed dramatically. I am much more guided by autocomplete and documentation within Xcode, and in-depth articles and videos about one particular topic, instead of reading books.