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Tim Wiklund
746 PointsNeed help with challenge task 1 of 1, 2.0 function.
func getTowerCoordinates(location: String) -> cordination: Double {
// Eiffel Tower lat 48.8582, lon 2.2945
// Great Pyramid lat 29.9792, lon 31.1344
// Sydney Opera House lat 33.8587, lon 151.2140
var cordination: Double
switch location {
case "Eiffel Tower": cordination = 48.8582; 2.2945
case "Great Pyramid": cordination = 29.9792; 31.1344
case "Sydney Opera House": cordination = 33.8587; 151.2140
default: cordination = 0
return (cordination)
}
}
getTowerCoordinates("Eiffel Toweer")
2 Answers
Martin Wildfeuer
Courses Plus Student 11,071 PointsIn this assignment, you are asked to return a location, which consists of two values, latitude and longitude. This is where tuples come in handy, because they let you return multiple values from a function. (You would still use a framework struct like CLLocation, but for the sake of this assignment it's a tuple)
In your code, you are returning a single Double, when you really need to return a tuple consisting of two Doubles. See the following code and annotations.
// The return type is a tuple, consisting of two Doubles
func getTowerCoordinates(location: String) -> (Double, Double) {
// Eiffel Tower lat 48.8582, lon 2.2945
// Great Pyramid lat 29.9792, lon 31.1344
// Sydney Opera House lat 33.8587, lon 151.2140
// Again, cordination is now a tuple (Double, Double)
var cordination: (Double, Double)
// Tuples are assigned as below
switch location {
case "Eiffel Tower": cordination = (48.8582, 2.2945)
case "Great Pyramid": cordination = (29.9792, 31.1344)
case "Sydney Opera House": cordination = (33.8587, 151.2140)
default: cordination = (0, 0)
}
// The return statement should really be the last thing of this function.
// You had it in the switch statement, where only case and default belong.
// (You could also return values from case/default, but what you did is considered
// best practice, that is having only one return statement at the bottom)
return cordination
}
// You had a typo here, "Eiffel Toweer", although
// this was not the reason for the check not to pass
getTowerCoordinates("Eiffel Tower")
As always: please paste your code in a playground, it offers code completion and helps with meaningful warnings and errors.
Hope that helps :)
<small>
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Tim Wiklund
746 PointsThanks for the quick respons and good description
Martin Wildfeuer
Courses Plus Student 11,071 PointsSure thing! Glad I could help :)