RxSwift
RxSwift is a reactive programming library for Swift that implements the ReactiveX (Rx) API, enabling developers to handle asynchronous events and data streams using observable sequences. It provides a declarative way to compose and transform sequences of values over time, making it easier to manage complex asynchronous operations like network requests, user interactions, and state changes in iOS and macOS applications. By leveraging functional programming concepts, it helps reduce side effects and improve code maintainability.
Developers should learn RxSwift when building iOS/macOS apps that involve complex asynchronous workflows, such as real-time data updates, event-driven UI interactions, or managing multiple concurrent tasks. It is particularly useful in MVVM architectures for binding view models to UI components, handling API calls with retry logic, and implementing debounced search inputs. Use cases include reactive UI updates, combining multiple network requests, and state management in apps with dynamic data flows.