Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Functions in Swift Adding Power to Functions Returning Complex Values

Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points
Posted by Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points

Is there a more easy way to complete this exercice?

Hello,

i'd like to know if i did it properly. is there a more easy way to complete this exercice?

i find it quite bad to declare a variable called "var geo = (0.0,0.0)" and then assigning all my case to this variable

functions.swift 
// Enter your code below

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

    var geo = (0.0,0.0)

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

    return geo

}

3 Answers

andren
andren
28,558 Points
andren
andren
28,558 Points

Yes there is a way to complete it without creating any variables at all within the function.

You can do this by returning the value directly within the case clauses rather than just assigning the values to a variable. Like this:

func coordinates(for 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)
    }
}
Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points
Theo VOGLIMACCI
Theo VOGLIMACCI
8,027 Points

Thanks Andren, at least i was true on that point ;-)

luke jones
luke jones
8,915 Points
luke jones
luke jones
8,915 Points

If you're aim is to make your code more readable, which should be the end goal most of the time, you could do this :

typealias Coordinate = (Double, Double)

func coordinates(for location: String) -> Coordinate {
switch location {
    case "Eiffel Tower": 
        return Coordinate(48.8582, 2.2945)
    case "Great Pyramid": 
        return Coordinate(29.9792, 31.1344)
    case "Sydney Opera House": 
        return Coordinate(33.8587, 151.2140)
    default: return (0,0)
    }
}