Swift Examples
Dave Braunschweig
Arrays
// This program demonstrates array processing, including: // display, total, max, min, parallel arrays, sort, // fixed arrays, dynamic arrays, and multidimensional arrays. // // References: // https://www.mathsisfun.com/temperature-conversion.html // https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/TheBasics.html import Foundation func displayArray(array: [Int]) { for index in 0...array.count - 1 { print("array[" + String(index) + "] = " + String(array[index])) } } func demonstrateParallelArrays(names:[String], ages:[Int]) { for index in 0...names.count - 1 { print(names[index] + " is " + String(ages[index])) } } func demonstrateFixedArray() { var array: [Int] = [Int](repeating: 0, count: 5) srand(UInt32(time(nil))) for index in 0...4 { array[index] = random() % 100 } print(array) } func demonstrateDynamicArray() { var array: [Int] = [] srand(UInt32(time(nil))) for _ in 0...4 { array.append(random() % 100) } print(array) } func demonstrateMultidimensionalArray() { var game: [[String]] game = [ ["X", "O", "X"], ["O", "X", "O"], ["X", "O", "X"] ] for row in 0...2 { for column in 0...2 { print(game[row][column], terminator:"") if column < 2 { print(" | ", terminator:"") } } print() } } func main() { var names: [String] var ages: [Int] var total: Int var maximum: Int var minimum: Int names = ["Lisa", "Michael", "Ashley", "Jacob", "Emily"] ages = [49, 48, 26, 19, 16] displayArray(array:ages) total = ages.reduce(0, +) maximum = ages.max()! minimum = ages.min()! print("total:", total) print("maximum:", maximum) print("minimum:", minimum) demonstrateParallelArrays(names:names, ages:ages) ages.sort() displayArray(array:ages) demonstrateFixedArray() demonstrateDynamicArray() demonstrateMultidimensionalArray() } main()
Output
array[0] = 49 array[1] = 48 array[2] = 26 array[3] = 19 array[4] = 16 total: 158 maximum: 49 minimum: 16 Lisa is 49 Michael is 48 Ashley is 26 Jacob is 19 Emily is 16 array[0] = 16 array[1] = 19 array[2] = 26 array[3] = 48 array[4] = 49 [89, 41, 22, 56, 60] [89, 41, 22, 56, 60] X | O | X O | X | O X | O | X