What is a dictionary?
Swift version: 5.0
A dictionary is a collection of values stored at named positions. Whereas you would access values in an array using myArray[5], with a dictionary you use named positions such as myDict["Paul"] or myDict["Scotland"]. You don't even need to use strings for the positions – you can use another object if you choose, such as dates.
These named positions are called "keys", so dictionaries represent what's known as a key-value pair: each key has exactly one value, and each can appear only once in a dictionary.
LEARN SWIFTUI FOR FREE I wrote a massive, free SwiftUI tutorial collection, and also have a growing list of free SwiftUI tutorials on YouTube – get started today!
Available from iOS 7.0 – learn more in my book
Did this solution work for you? Please pass it on!
Other people are reading…
- How to run code when an object is destroyed
- How to reverse sort an array
- What is a selector?
- How to break out of multiple loop levels using labeled statements
- What is a lazy sequence?
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
