Multiple ways to flatten an array in the swift example

Multiple ways to flatten an array in Swift with code examples

Array reduce function
Array joined function
Array flatMap function The array contains a sequence of elements, and it contains different dimensions.

Flattening is a process of converting or reducing a multiple given dimensions array into a single dimension.

Flatten an array of the array is converted to an array. For example, Given an array of arrays as given below

[[1,2],[3,4],[5,6],[7,8,9,10]]

And output is

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Array flatten swift with examples

There are multiple ways to flatten an array in Swift.

Using the Array reduce method
Array reduce method takes a sequence type such as array and applies the operation such as combine and return reduced value.

Here is an example

import Foundation
var numbers = [[1,2],[3,4],[5,6],[7,8,9,10]]
let result = numbers.reduce([], +)
print(result)

The joined method in the array concatenates the elements and passes this result into the Array object.

import Foundation
var numbers = [[1,2],[3,4],[5,6],[7,8,9,10]]
let result = Array(numbers.joined())

print(result)

The flatMap method in an array concatenates the elements and flattens an array.

import Foundation
var numbers = [[1,2],[3,4],[5,6],[7,8,9,10]]
let result = numbers.flatMap { $0 }
print(result)