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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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: 

movements.reduce(into: 😺(x: 0, y: 0))🛑 

movements.reduce(into: (x: 0, y: 0)) 😺{ (location, movement) in 🛑

...
  case .west:
    location.x -= 1
  }
😺}🛑

  ❌return location❌