Programming in Swift: Functions & Types

Jan 4 2022 · Swift 5.5, iOS 15, Xcode 13

Part 3: Enumerations

25. Challenge: Switch Statements

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Previous episode: 24. More Switch Statements Next episode: 26. Associated Values

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Notes: 25. Challenge: Switch Statements

Update Notes: This course was originally recorded in 2019. It has been reviewed and all content and materials updated as of October 2021.

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Your next challenge is here! This time you’ll be testing yourself on switch statements. You’ll find everything you need on page 6 of the Playground for this part of the course. Pause the video, give it your best try, and then come back to check my solution.

let lifeStage: String
switch ("Ozma", 7) {

case (let name, 0...2):
case (let name, 0...2):
  😺lifeStage = "\(name) is Infant."
case (let name, 3...12):
  lifeStage = "\(name) is Child."
case (let name, 13...19):
  lifeStage = "\(name) is Teenager."
case (let name, 20...39):
  lifeStageForName = "\(name) is Adult."
case (let name, 40...60):
  lifeStage = "\(name) is Middle aged."
case (let name, 61...):
  lifeStage = "\(name) is Eldery."
case (_, let age):
  lifeStage = "Unaccounted for age: \(age)."
enum Direction {
  case north, south, east, west
func getLocation(for movements: [Direction])
func getLocation(for movements: [Direction])😺 -> (x: Int, y: Int) {

  var location = (x: 0, y: 0)
for movement in movements {

    switch movement {
    case .north:
      location.y += 1
    case .south:
      location.y -= 1
    case .east:
      location.x += 1
    case .west:
      location.x -= 1
  return location
getLocation(for: [.north, .west, .west])
❌  var location = (x: 0, y: 0)❌
movements.reduce(into: 😺(x: 0, y: 0))🛑 
movements.reduce(into: (x: 0, y: 0)) 😺{ (location, movement) in 🛑
  case .west:
    location.x -= 1
  ❌return location❌