func

Automatic Stubbing of Network Requests to Deflakify Automation Testing

Published 2018-01-26 func request session

Apple introduced automated UI testing in Xcode 7. This was a great addition for developers because this native support promised, among other things, an improvem…

Implementing Dark Mode Using the Observer Pattern

Published 2019-11-08 func observers observer

Last week’s update to the SoundCloud iOS app includes support for Dark Mode. This took several months of work and collaboration between…

Specialized extensions using generic type constraints

Published 2021-10-22 renderable render func

How Swift’s generics system enables us to create specialized extensions that only apply to types that fit certain requirements, and how that capability can be r…

Using Swift’s concurrency system to run multiple tasks in parallel

Published 2021-11-04 throws func url

Let’s take a look at a few different ways to run multiple tasks in parallel when using Swift’s built-in concurrency system, and when each of those techniques ca…

Building async and concurrent versions of forEach and map

Published 2021-11-11 favoritesmanager func try

Let’s take a look at how we can utilize Swift’s built-in concurrency system when performing data transformations using functions like forEach and map.

Two ways of capturing self strongly within a closure

Published 2022-01-03 viewwillappear capturing func

How to use either explicit self references or a capture list to capture self strongly within an escaping Swift closure.

Using the ‘some’ and ‘any’ keywords to reference generic protocols in Swift 5.7

Published 2022-06-09 contentitem bookmarkscontroller func

How Swift 5.7 makes generic protocols more powerful and easier to work with, thanks to the ‘some’ and ‘any’ keywords.

Swift protocols and the main actor

Published 2026-08-01 uiview errorpresenter mainactor

How the main actor relates to Swift protocols, and what the practical differences are between isolating an entire protocol to the main actor, versus only markin…

Using Swift’s ‘some’ keyword beyond SwiftUI

Published 2026-10-01 downloadoperation keyword func

How the ‘some’ keyword can be used to create clean APIs and abstractions when using generics, even outside the realm of SwiftUI.

Interesting ways of using Swift optionals

Published 2026-10-31 loadingstate func optional

A showcase of different interesting ways of using optionals that go beyond simple unwrapping of values.