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
Christopher David
Courses Plus Student 20,027 PointsWhat is wrong with my code for guarding against the optional values?
I'm not sure what I am doing wrong here. Can anyone enlighten me?
struct Book { let title: String let author: String let price: String? let pubDate: String?
init?(dict: [String: String]) {
guard let self.title = dict["title"], let self.author = dict["author"] else {
return nil
}
let self.price = dict["price"]
let self.pubDate = dict["pubDate"]
}
}
struct Book {
let title: String
let author: String
let price: String?
let pubDate: String?
init?(dict: [String: String]) {
guard let self.title = dict["title"], let self.author = dict["author"] else {
return nil
}
let self.price = dict["price"]
let self.pubDate = dict["pubDate"]
}
}
1 Answer
Christopher David
Courses Plus Student 20,027 PointsI realized what I was doing wrong. I was reinitializing the variables when I should not have as well as needed temp variables in the guard statement.
'''Swift struct Book { let title: String let author: String let price: String? let pubDate: String?
init?(dict: [String: String]) {
guard let bookTitle = dict["title"], let bookAuthor = dict["author"] else {
return nil
}
self.title = bookTitle
self.author = bookAuthor
self.price = dict["price"]
self.pubDate = dict["pubDate"]
}
} '''