Tuples

Overview

Tuples enable you to create and pass around groupings of values. You can use a tuple to return multiple values from a function as a single compound value. (Swift.org)

(firstName: String, lastName: String)

Sample Codes

Example 1

func getUser() -> (firstName: String, lastName: String) {
    (firstName: "Taylor", lastName: "Swift")
}

// Long version
//let user = getUser()
//let firstName = user.firstName
//let lastName = user.lastName
//print("Name: \(firstName) \(lastName)")

// Short version
//let (firstName, lastName) = getUser()
//print("Name: \(firstName) \(lastName)")

// If you want to use only one field you should use "_" instead of that field
let (firstName, _) = getUser()
print("Name: \(firstName)")

Arrays, Sets, Tuples... When to use which?

Type	Allows Duplicates	Ordered	Multiline String	Can Grow?	Best for
Array	Yes	Yes	?	Yes	Score List by User,
Set	No	No	?	?	Dictionary,
Tuple	Yes	No?	Yes	No	Forms,

Sources

Videos

Articles / Documents

• Hacking With Swift / When should you use an array, a set, or a tuple in Swift?

• Hacking With Swift / What’s the difference between a struct and a tuple?