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iOS Functions in Swift Adding Power to Functions Returning Complex Values

Craig Ward
Craig Ward
1,149 Points
Posted by Craig Ward
Craig Ward
1,149 Points

Swift Basics - Fucntion - Returing Complex Values Code Challenge

I am puzzled on this challenge. I have hunted for help and came accorss this solution:

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

However I receive this message: Bummer! Make sure you accept a single parameter of type String in your function declaration with the correct argument labels

I have used (location: String) but am at a loss. Cheers C

functions.swift 
func coordinates(location: String) -> (Double, Double) {

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

2 Answers

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

The code is almost correct. The problem is that you do not give the string parameter an external name, which the challenge instructions specify that you have to do. Specifically you have to give it an external name of for. So the solution looks like this:

func coordinates(for location: String) -> (Double, Double) {
    switch location {
    case "Eiffel Tower":
        return (lat: 48.8582, lon: 2.2945)
    case "Great Pyramid":
        return (at: 29.9792, lon: 31.1344)
    case "Sydney Opera House":
        return (lat: 33.8587, lon: 151.2140)
    default: (0,0)
    }
    return (0,0)
}
Craig Ward
Craig Ward
1,149 Points
Craig Ward
Craig Ward
1,149 Points

Thank you. I didn't fully understand that at first but that makes perfect sense as the 'for' is required outside fo the parenthesis Cheers C