How to insert elements anywhere in an array in Swift

Overview

Elements can be inserted at any position into an array, using the insert(contentsOf:at:) method. All we need to do is specify the elements we want to insert, along with the index position of where the insertion should begin.

Syntax

arr.insert(contentsOf: elements, at: index)

Parameters

elements: These are the elements that we want to insert into the array arr.

index: This is the index position at which we want to start the insertion.

Return value

The value returned is a new array with the specified elements inserted at the index position index.

Code example

// create arrays
var arr1 = [1, 3, 4]
var arr2 = ["a", "b", "g"]
var arr3 = ["Amazon", "Meta"]
// insert elements to any position
arr1.insert(contentsOf: [100, 200], at: 3)
arr2.insert(contentsOf: ["c", "d", "e", "f"], at :  2)
arr3.insert(contentsOf: ["Google", "Netflix", "Apple"], at : 0)
// print modified arrays
print(arr1)
print(arr2)
print(arr3)

Code explanation

  • Lines 2–4: We create some arrays.
  • Lines 7–9: We insert some elements into the arrays we created by specifying the position at which they should be inserted.
  • Lines 12–14: We print the modified arrays.
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