Guest

• Donny Wals - donnywals.com
  • Twitter @donnywals
  • Practical Combine (25% Off Link!!!) - An introduction to Combine with real examples

Related Episodes

• Episode 33: 2020 Developer Wish List with Alex Bush
• Episode 19: WWDC 2019 - Swift UI with Jason Anderson

Related Links

• Donny's Posts on Combine
• Using Combine by Joseph Heck
• Timelane by Marin Todorov
• CombineCocoa - helpers for UIKit
• rxswift-to-combine-cheatsheet - cheatsheet for Reactive API Patterns
• Removing duplicate values from an array in Swift by Donny Wals
• Asynchronous Multi-Threaded Parallel World of Swift by Leo Dion
• Preventing strong reference cycles - using assign with self
• Heartwitch for the Apple Watch (uses Combine, SwiftUI, and Vapor)
• ReactiveX - An API for asynchronous programming with observable streams
  • RxSwift - Swift ReactiveX implementation
• Promise Libraries
  • PromiseKit
  • SwiftNIO
  • Google Promises
• Open source implementations of Apple's Combine framework
  • OpenCombine
  • CombineX

Sponsors

• Great for Setting Up a Backend for Your App
• Variety of VM Configurations and Settings
• Reasonable Pricing Starting at $5 per month
• Global Data Centers
• The Developer Cloud Simplified

Disney Streaming Services

• How the service has been affected by the pandemic
• Expansion to other regions
• How Donny uses Swift at Work
• Apps that DSS support
• Working from Home regularly and now

Practical Combine

• What is Functional Reactive Programming?
• What is a Publisher and it's relationship with time
• How Publishers can simplify data tasks and JSON decoding
• The advantages of functional programming
• Why it's important to keep track of Cancellables?
• How to store and remove Cancellables in your ObservedObject
• Differences between Threads and Schedulers
• Why Type-Erasure is important in Combine

Lifecycle of a Stream

• Sink vs. Assign
• Differences between Combine and other Reactive Programming
• Differences between Combine and MVC
• Differences between Combine and Promises
• Builtin Publishers with Notifications, Timers, and Data Tasks
• How to work with Delegates and Callbacks
• When to use @Published vs PassthroughSubject vs CurrentSubject
• How easy is it to use Combine with UIKit
• How do you build your own Publisher and Subscriber

Projects and Combine

• How does Combine fit with current or future projects
• Where would Combine not be a good fit
• Is Combine production ready for new apps
• How to do Unit Testing with Combine
• How to debug with Combine
• Are there alternatives for older OSes or Linux?

Writing Practical Combine

• How Donny got started
• How he tested the idea
• What questions he asked when getting started
• Using questions to organize content
• How he got outsiders to edit and beta test the book
• What topic is Donny is interested in next?

Social Media

Credits

• Edward Sanchez
• Steven Lipton