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7:33
Filtering and Transforming Elements with Operators
Building Reactive Applications With Combine
The Published property wrapper lowers the barrier to start integrating the Combine framework into a project. There are a few details you need to take into account, though. Remember from the previous episode that we need to address two issues. Let's look at the first issue.
in Programming
8:01
Reactifying Swift with the Published Property Wrapper
Building Reactive Applications With Combine
The Cocoa frameworks use a range of asynchronous interfaces, including the target-action pattern, key-value observing, notifications, and callbacks. We can leverage the Combine framework to create a single, unified interface for asynchronous programming. This opens up a number of compelling advantages.
in Programming
6:45
Understanding the Life Cycle of a Subscription
Building Reactive Applications With Combine
You learned in the previous episode that a publisher sends zero or more values. A publisher emits an error if something goes wrong and, if the publisher is finite, it can send a completion event. In this episode, we continue exploring the relationship between publishers and subscribers. We zoom in on the life cycle of a subscription.
in Programming
8:17
Working With Publishers and Subscribers
Building Reactive Applications With Combine
Streams of values are at the heart of reactive programming. These values are delivered by publishers. In this episode, we zoom in on the relationship between publishers and subscribers.
in Programming
5:48
Adding Operators to the Mix
Building Reactive Applications With Combine
We haven't simplified or improved the implementation of the setupNotificationHandling() method of the RootViewModel class by adding Combine to the mix. In fact, Combine introduced additional complexity and we now need to manage the subscriptions we create. It is true that Combine comes with a bit of overhead. The traditional Cocoa API seems to be the better choice. Right?
in Programming
4:24
Managing Subscriptions
Building Reactive Applications With Combine
In the previous episode, you learned about publishers and subscribers. Combine creates a subscription when a subscriber is attached to a publisher. In the setupNotificationHandling() method of the RootViewModel class, the subscription is returned to the view model as an AnyCancellable instance. The view model holds on to the AnyCancellable instance to prevent the subscription from terminating early. We covered this in the previous episode.
in Programming
7:51
Getting Your Feet Wet With Combine
Building Reactive Applications With Combine
It is time to show you what Combine feels like and what it can do for you. What do you gain by using the Combine framework in your projects? Let's start with some good news. The Combine framework has a relatively small vocabulary. You don't need to spend days or weeks familiarizing yourself with a plethora of types, protocols, and terminology.
in Programming
4:17
What Is Combine
Building Reactive Applications With Combine
Earlier in this series, we defined reactive programming as working with asynchronous streams of data. Now that you know what asynchronous streams of data are, it is clear why asynchronous programming is such a powerful concept.
in Programming
4:39
What Is Void in Swift
What The Swift
In the previous episodes of this series, we explored AnyObject and Any. Another keyword you encounter frequently in Swift is Void. What is Void? That is the focus of this installment of What The Swift.
6:51
Pure Functions and Higher-Order Functions
Building Reactive Applications With Combine
In the previous episode, you learned about function types and what it means for Swift to have first-class functions. With these concepts in mind, we continue exploring the functional features of the Swift programming language. In this episode, we explore pure functions and higher-order functions. We start with pure functions.
in Programming
6:49
First-Class Functions and Function Types
Building Reactive Applications With Combine
Swift isn't a functional programming language, but it does have a number of functional features. The Combine framework relies on these functional features so it is important that you understand the basics of functional programming. That is the focus of this and the next episode.
in Programming
3:17
Why You Should Default to Private Outlets
Tips and Tricks
I love that access control is an integral component of the Swift programming language. Access control lets you carefully control what properties and methods an entity exposes. Rigorously applying access control has significant benefits. You can even improve performance through access control.