Video 11
Video: Closures II
Global and nested functions, as introduced in Functions, are actually special cases of closures. Closures take one of three forms: Global functions are closures that have a name and do not capture any values. Nested functions are closures that have a name and can capture values from their enclosing function. Closure expressions are unnamed closures […]
Video: Generics
Generic code enables you to write flexible, reusable functions and types that can work with any type, subject to requirements that you define. You can write code that avoids duplication and expresses its intent in a clear, abstracted manner. Generics are one of the most powerful features of Swift, and much of the Swift standard […]
Video: Protocols
A protocol defines a blueprint of methods, properties, and other requirements that suit a particular task or piece of functionality. The protocol doesn’t actually provide an implementation for any of these requirements—it only describes what an implementation will look like. The protocol can then be adopted by a class, structure, or enumeration to provide an […]
Video: Subscripts
Classes, structures, and enumerations can define subscripts, which are shortcuts for accessing the member elements of a collection, list, or sequence. You use subscripts to set and retrieve values by index without needing separate methods for setting and retrieval. For example, you access elements in an Array instance as someArray[index] and elements in a Dictionary […]
Video: Enumerations
An enumeration defines a common type for a group of related values and enables you to work with those values in a type-safe way within your code. If you are familiar with C, you will know that C enumerations assign related names to a set of integer values. Enumerations in Swift are much more flexible, […]
