Swift Array Cheat Sheet

Array.swift

// Initialize an array with fixed number of default values
var digitCounts = Array(repeating: 0, count: 5)
// [0, 0, 0, 0, 0]

// Convert an array of integers to an array of strings, use 'map()'
let numbers: [Int] = [1, 2, 3, 4, 5]
let stringArray = numbers.map { String($0) }

// Find the maximum element in an array, can be nil
let numbers = [1, 2, 3, 4, 5]
let max = numbers.max() // max will be 5

Array | Apple Developer Documentation