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
