Swift Tuples

Tuples are a data structure introduced in Swift 4.0. It is used to group multiple values, separated by commas ,, into a single value that is enclosed in parentheses ().

Note: Tuples are compound types. This means that they can combine different types of data.

Syntax

var myTuple = (value1, value2, ...)

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Note: Variable names and property names in Swift should follow the API Design Guidelines and be in lowerCamelCase.

Accessing and Changing Values

Values of a tuple can be accessed using indices:

var computerScience = (1960, "George Forsythe")

print(computerScience.0)
// Output: 1960

print(computerScience.1)
// Output: George Forsythe

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Values or elements can also be referenced with a named property:

var alanTuring = (
  name: "Alan Mathison Turing",
  born: 1912,
  inventions: ["Universal Turing Machine", "Bombe"]
)

print("\(alanTuring.name) was born in \(alanTuring.born) and invented the \(alanTuring.inventions[0]).")
// Alan Mathison Turing was born in 1912 and invented the Universal Turing Machine.

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These values can then be altered through their indices or name:

computerScience.0 = 1961
print(computerScience.0)
// Output: 1961

alanTuring.inventions.append("Automatic Computing Engine")
print(alanTuring.inventions)
// Output: ["Universal Turing Machine", "Bombe", "Automatic Computing Engine"]

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