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iOS Swift 2.0 Functions Function Parameters Returning Complex Values

Amit Ahuja
Amit Ahuja
706 Points
Posted by Amit Ahuja
Amit Ahuja
706 Points

What to use for return statement

I know I'm missing a return statement but I can't figure out what to use for it to return as a (Double, Double)

functions.swift 
// Enter your code below
func getTowerCoordinates(location: String) -> (Double, Double) {
    switch location {
    case "Eiffel Tower": (48.8582, 2.2945)
    case "Great Pyramid": (29.9792, 31.1344)
    case "Sydney Opera House": (33.8587, 151.2140)
    default: (0,0)
    }

}

1 Answer

Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Hi Amit,

Sorry - my initial answer was wrong. I wasn't paying close enough attention :).

Your switch statement is actually not doing anything at all. It checks the value of location, and then just "says" a tuple. You need to do one of two things:

  1. Return the tuple directly
  2. Store the tuple in a variable, and then return the variable.

Here's how that would look:

Option1.swift 
func getTowerCoordinates(location: String) -> (Double, Double) {
    switch location {
    case "Eiffel Tower": return (48.8582, 2.2945)
    case "Great Pyramid": return (29.9792, 31.1344)
    case "Sydney Opera House": return (33.8587, 151.2140)
    default: return (0,0)
    }

}

OR

Option2.swift 
func getTowerCoordinates(location: String) -> (Double, Double) {

    var coordinates: (Double, Double)

    switch location {
    case "Eiffel Tower": coordinates = (48.8582, 2.2945)
    case "Great Pyramid": coordinates = (29.9792, 31.1344)
    case "Sydney Opera House": coordinates = (33.8587, 151.2140)
    default: coordinates = (0,0)
    }

    return coordinates

}
Amit Ahuja
Amit Ahuja
706 Points
Amit Ahuja
Amit Ahuja
706 Points

Hi Greg,

I actually tried that before and kept getting an error of not being able to convert a String into (Double, Double). This is what I currently have. Is there something wrong with the formatting?

Thanks

func getTowerCoordinates(location: String) -> (lat: Double, lon: Double) {

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

}
Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Hey sorry Amit - completely whiffed on my first answer. I've edited my answer above.