Not sure what is wrong with my for the challenge. Struggling with the "self" portions of the code, I think...

Question

Ok, there is a challenge in the Object-Oriented 2.0 that asks you to do this...

*In the editor you've been provided with a struct named Location that models a coordinate point using longitude and latitude values.

For this task we want to create a class named Business. The class contains two constant stored properties: name of type String and location of type Location.

In the initializer method pass in a name and an instance of Location to set up the instance of Business. Using this initializer, create an instance and assign it to a constant named someBusiness.*

Here is what I did:

struct Location {
    let latitude: Double
    let longitude: Double

    init(latitude: Double, longitude: Double) {
        self.latitude = latitude
        self.longitude = longitude
    }
}

class Business {
    let name: String
    let location: Location

    init(name: String, location: Location) {
        self.name = name
        self.location = Location(latitude: <#T##Double#>, longitude: <#T##Double#>)
    }
}

let someBusiness = Business(name: "REI", Location(latitude: 12.1, longitude: 12.2)

I felt pretty confident typing it but now that it's wrong I have no clue what to do. I am thinking I might be misunderstanding the "self" stuff. As I was writing it, I was having a hard time trying to figure out how to initialize an instance of the location by entering in the lat and long, so maybe that's what's wrong....any help would be awesome! These lessons in swift have been a challenge. Also first time posting so, sorry if the markdown makes everything look a little off...

Answer 1 · 2016-07-06T00:45:58Z

July 6, 2016 12:45am

There's only 2 things I see wrong with your code. Overall, I think you understand the self keyword properly. The 2 mistakes I see are that in the initializer for Business, it's gonna be way easier to just assign self.location = location instead of initializing a whole new Location instance. The other one is a really simple mistake that I make all the time, even after 2 years of writing Swift. You just forgot a closing paren at the very end of the last line, so it should read like this:

let someBusiness = Business(name: "REI", Location(latitude: 12.1, longitude: 12.2))

Answer 2 · 2016-10-11T17:09:56Z

October 11, 2016 5:09pm

struct Location { let latitude: Double let longitude: Double }

class Business { let name: String let location: Location

init(name: String, location: Location){
    self.name = name
    self.location = Location(latitude: 20.9, longitude: 29.9)
}

}

let someBusiness = Business(name: "REI", location: Location(latitude: 12.1, longitude: 12.2))

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Ryan Doyle

Ryan Doyle

Not sure what is wrong with my for the challenge. Struggling with the "self" portions of the code, I think...

2 Answers

Michael Hulet

Michael Hulet

Ryan Doyle

Ryan Doyle

Mohammed Abushamala

Mohammed Abushamala