Tuple in Swift

This article explains what a Tuple is and when and where it is used. Happy reading!!!

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Tuple is a group of different values represented as one . According to apple, a tuple type is a comma-separated list of zero or more types, enclosed in parentheses. It’s a miniature version of a struct.

Let’s consider an example: A name say John smith can be declared as a tuple like ("John", "Smith") . It holds the first and last name of a person. You can access the inner values using the dot(.) notation followed by the index of the value:

var person = ("John", "Smith")

var firstName = person.0 // John
var lastName = person.1 // Smith

The type of a tuple is determined by the values it has. So ("tuple", 1, true) will be of type (String, Int, Bool).

() is the empty tuple – it has no elements. It also represents the Void type.

Tuples don’t conform to the hashable protocol. Hence it cannot be used as dictionary keys.

Creating a tuple:

You can declare a tuple like any other variable or constant. To initialize it you will need a another tuple or a tuple literal. A tuple literal is a list of values separated by commas between a pair of parentheses. You can use the dot notation to change the…