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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Sam Belcher
Sam Belcher
3,719 Points
Posted by Sam Belcher
Sam Belcher
3,719 Points

Returning Complex Values

I'm confused, not sure how to fix my mistake :/

functions.swift 
// Enter your code below
func coordinates(for location: String) -> (Double, Double) {

  var place: Double = []

  switch location {
  case "Eiffel Tower": place = [48.8582, 2.2945]
  case "Great Pyramid": place = [29.9792, 31.1344]
  case "Sydney Opera House": place = [33.8587, 151.2140]
  default: place = [0.0, 0.0]
 }
 return(place)
}

1 Answer

JLN CRML
JLN CRML
30,362 Points
JLN CRML
JLN CRML
30,362 Points

Hi, you try to assign an empty array to a variable of type Double, which is not possible. You also might rather want to use Tuples here, since they always have two values, perfectly fitting for coordinates.

Swift Documentation - Types

I am showing you below two methods of solving this without changing the signature, either with Tuples, which I would recommend, or Arrays.

func coordinates(for location: String) -> (Double, Double) {

    var place: (Double, Double)

    switch location {
    case "Eiffel Tower": place = (48.8582, 2.2945)
    case "Great Pyramid": place = (29.9792, 31.1344)
    case "Sydney Opera House": place = (33.8587, 151.2140)
    default: place = (0.0, 0.0)
    }
    return(place)
}

func coordinates(for location: String) -> (Double, Double) {

    var place: [Double] = []

    switch location {
    case "Eiffel Tower": place = [48.8582, 2.2945]
    case "Great Pyramid": place = [29.9792, 31.1344]
    case "Sydney Opera House": place = [33.8587, 151.2140]
    default: place = [0.0, 0.0]
    }
    return(place[0], place[1])
}