How to Rotate Elements in an Array in Swift - Step by Step Examples

How to Rotate Elements in an Array in Swift ?

Answer

To rotate elements in an array using Swift, you can implement a custom rotation function that shifts elements by a specified number of positions.

✐ Examples

1 Rotate Array of Integers

In this example,

We have an array named intArray containing integers.
We implement a custom rotate function that shifts elements by a specified number of positions.
We print the rotated array to demonstrate the rotation.

Swift Program

var intArray = [1, 2, 3, 4, 5]
let positions = 2

func rotateArray(_ array: inout [Int], _ positions: Int) {
    let n = array.count
    let p = positions % n
    array = Array(array.reversed())
    array[0..<p] = array[0..<p].reversed()
    array[p..<n] = array[p..<n].reversed()
}

rotateArray(&intArray, positions)
print("Rotated Array:", intArray)

Output

Rotated Array: [4, 5, 1, 2, 3]

2 Rotate Array of Strings

In this example,

We have an array named strArray containing strings.
We implement a custom rotate function that shifts elements by a specified number of positions.
We print the rotated array to demonstrate the rotation.

Swift Program

var strArray = ["apple", "banana", "cherry", "date", "fig"]
let positions = 3

func rotateArray(_ array: inout [String], _ positions: Int) {
    let n = array.count
    let p = positions % n
    array = Array(array.reversed())
    array[0..<p] = array[0..<p].reversed()
    array[p..<n] = array[p..<n].reversed()
}

rotateArray(&strArray, positions)
print("Rotated Array:", strArray)

Output

Rotated Array: ["date", "fig", "apple", "banana", "cherry"]

Summary

In this tutorial, we learned How to Rotate Elements in an Array in Swift language with well detailed examples.

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How to Rotate Elements in an Array in Swift - Step by Step Examples

How to Rotate Elements in an Array in Swift ?

Answer

✐ Examples

1 Rotate Array of Integers

Swift Program

Output

2 Rotate Array of Strings

Swift Program

Output

Summary

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