Swift Functional Programming - Second Edition

States

In our application, we need to manage states to keep the State management code as declarative as possible. We will use a library named Delta (https://github.com/conqueror/Delta/blob/master/documentation/getting-started.md).

Delta will be used along with ReactiveCocoa and ReactiveSwift to manage states and State changes reactively. The code is as follows:

import ReactiveCocoa import ReactiveSwift import Delta extension MutableProperty: Delta.ObservablePropertyType {     public typealias ValueType = Value } 

In the preceding code, we extend the ReactiveSwift library's MutableProperty by conforming to Delta.ObservablePropertyType.

The ObservablePropertyType protocol must be implemented by the State that is held by Store. To use a custom ...