In Swift, a protocol defines a blueprint of methods or properties that can then be adopted by classes or any other types.
A result builder is a type that builds a nested data structure step by step. You use result builders to implement a domain-specific language (DSL) for creating nested data structures in a natural, declarative way.
Subscripts can take any number of input parameters, and these input parameters can be of any type. Subscripts can also return a value of any type.
An actor is a reference type that protects access to its mutable state, and is introduced with the keyword `actor`.
Swift 5.7, included in Xcode 14 Beta, introduces a whole spectrum of changes, from smaller syntax improvements to larger generics and concurrency updates.
Global actors make it possible to safely work with global variables in a concurrent program, as well as modeling other global program constraints.
Shorthand syntax for optional binding conditions that shadow an existing variable by omitting the right-hand expression.
One way to perform operations concurrently in iOS is with the Operation and OperationQueue classes built on top of GCD.
You specify an attribute by writing the @ symbol followed by the attribute’s name and any arguments that the attribute accepts.
Swift protocols play a leading role in the structure of standard library and a common method of abstraction, provide a similar experience to interfaces that some other languages have.