Learn what higher-order functions are, and how to write and use them in Swift. Expand your understanding with examples from the Swift Standard Library, the new Swift Algorithms framework, and SwiftUI.

Learn how to use opaque return types and type erasure to improve your understanding of intuitive and effective APIs, both as a developer and a consumer.

Destructuring declarations is a Kotlin feature that gives you a tool for easily extracting data from a collection in a simple and clean way.

We haven't seen many breaking changes in SwiftUI, but here are some deprecations and replacements you should look out for this year!

With WWDC 2021, Apple released a whole bunch of concurrency features with async/await leading the pack. In this video, you'll learn how to use this new language feature but more importantly, you'll...

Learn how to use the object keyword in Kotlin to define singleton, companion and anonymous objects and to ensure Java interoperability.

Convert a SwiftUI app to use the new Swift concurrency and find out what’s going on beneath the shiny surface.

Get an introduction to the basics of the Dart programming language, used for development with the Flutter SDK for mobile, web and beyond.

In this Values and Mutability tutorial, you’ll learn how to declare mutable, immutable, constant, late/lazily initialized, static & inline values.

Annotation processing is a powerful tool that allows you to pack more data into your code, and then use that data to generate more code.

Find out where and how to save data in iOS! This course explores common methods for persisting user data, all from within Xcode Playgrounds.

The old way of making network calls with Retrofit utilizes callbacks. In this course, learn how to greatly simplify Android networking code with an app that retrieves and displays a list of GitHub...

In this tutorial for Android, you’ll learn to use Kotlin extension functions and properties to extend the functionality of existing classes.

Gain a deeper understanding of functions, practice using closures, and build your skills with named types.

Learn about Apple’s open source programming language, Swift, through hands-on examples! Take a deep dive into the Swift language, learning about core Swift concepts like loops, collections, types,...

In this Swift tutorial, you’ll learn how to use collection protocols to create your own implementation of a Bag collection type.

Learn how to add concurrency to your apps! Keep your app’s UI responsive to give your users a great user experience, and learn how to avoid common concurrency problems, like race condition,...

Continuing the Functional Programming with Kotlin and Arrow Part 2: Categories and Functors tutorial, you’ll now go even further, using a specific and common use case, with a better understanding...

Annotation processing is a powerful tool for generating code for Android apps. In this tutorial, you’ll create one that generates RecyclerView adapters.

Learn the fundamentals about threads and coroutines, along with the basics of the Kotlin Coroutines framework.

Take a deeper look at the Kotlin programming language! Explore the intricacies of functions, lambdas, classes, objects, interfaces, and more.

Learn the fundamental building blocks of Kotlin, through hands-on exercises and challenges! Explore the world of data types, comparison and logical operators, loops, control flow, functions,...

Swift 5.2 is now available as part of Xcode 11.4. In this article, you’ll get an overview of the changes you’ll see moving to Swift 5.2.

In this tutorial you’ll discover everything you need to start developing Swift on Linux. You’ll learn about LLDB, using SourceKit-LSP, syntax highlighting and the power of autocomplete.