Swift Weekly - Issue #92

When creating collections of objects or values in Swift, we usually use data structures provided by the standard library - such as Array, Dictionary and Set. While those three cover most use cases, sometimes creating a custom wrapper collection can enable you to make your code more predictable and less prone to errors. John Sundell takes a look at how we as app developers can define such custom collections in Swift!

Mike Ash talks about the current implementation of weak references and how it works compared to the old one.

Jesse Squires explains how floating-point numbers work in Swift and what the .ulpOfOne and .ulp properties do.

Another year passes and another set of changes to the Swift String API arrives. Swift 4 brings some much needed improvements and simplifications to String. These are Keith Harrison’s notes on what he needed to change to update his Swift String Cheat Sheet for Swift 4.

It’s extremely important to make the debugging process as simple as possible. Ahmed Sulaiman shares some of his personal LLDB tricks.

While switch statements are hardly something that was invented as part of Swift, they are made a lot more powerful when combined with Swift’s type system. John Sundell goes further beyond switching on single enum values and takes a look at more of the powerful capabilities that switch statements offer in Swift.

Do you want to play with Codable, the new kid in Swift 4? Víctor Pimentel writes a wonderful and extensible API client!

A few helpful tips on dealing with less-than-ideal JSON responses with Codable in Swift 4 and Xcode 9.

This tutorial explains how to manage different environments in your Swift project.

Testing whether a given completion handler was called is really simple with XCTestExpectation. Things get complicated if your test case has to verify whether the handler was not called.

Swift 4 is now officially released! Swift 4 builds on the strengths of Swift 3, delivering greater robustness and stability, providing source code compatibility with Swift 3, making improvements to the standard library, and adding features like archival and serialization.

The new Swift Playgrounds update introduces a new Augmented Reality challenge that uses ARKit in iOS 11 to showcase Byte’s virtual world within the real world.

James takes a look at how to use Swift 4 to create view controller interfaces that are easier to read and ready for seamless use.

Join Jorge Molina and George Karavias as they go step by step through the whole process of creating a machine learning app from the ground up.

Neem Serra explains how to improve your code readability and compactness by using mapping and flatMapping in Swift

LifetimeTracker - Find retain cycles / memory leaks sooner.

http - Repository for the development of cross-platform HTTP APIs

HGCircularSlider - A custom reusable circular/progress slider control for iOS application.

Time - 🕰 Type-safe time calculations in Swift, powered by generics

InfoKit - Strongly Typed access to the Info.plist for iOS, macOS and tvOS.

Imaginary - :unicorn: Remote images, as easy as one, two, three.

Mint - A package manager that installs and runs Swift command line tools