can listen to and react accordingly. Functional Programming, which emphasizes calculations via mathematical-style functions, immutability and expressiveness, and minimizes the use of variables and state. FRP is the combination of functional and reactive paradigms. In other words, it is reacting to data streams using the functional paradigm. Eg: RxSwift, ReactiveSwift Functional Reactive Programming
by Apple that streamlines how you can process asynchronous operations. Combine code is declarative and succinct, making it easy to write and read once you have a basic understanding of it. Combine also allows you to neatly organize related code in one place instead of having that code spread out across multiple files.
subscribers. To become a publisher, a type must adopt and conform to the Publisher protocol, which includes the following: associatedtype Output associatedtype Failure : Error Specifically, a publisher must define the type of values it will send, and its failure error type or Never if it will never send an error.
subscriptions: • Call cancel() on a subscription token. • Do nothing and let normal memory management rules to apply, i.e., the token or collection of AnyCancellable will call cancel() on the subscriptions upon deinitialization.
iOS, macOS, watchOS, and tvOS. SwiftUI that relies heavily on Combine. The Foundation framework contains a lot of extensions to work with Combine. It allows to work with common types we are already familiar with: • A URLSessionTask Publisher that publishes the data response or request error • Operators for easy JSON decoding • A Publisher for a specific Notification.Name that publishes the notification