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iOS Enumerations and Optionals in Swift Introduction to Optionals Initializing Optional Values

David Carr
David Carr
1,070 Points
Posted by David Carr
David Carr
1,070 Points

Code not accepted, but there are no errors. What am I doing incorrectly?

I've ran this in swift playground and initialized a constant with and without titles and authors in the dictionary. It seems to work just fine. What am I doing wrong, that prevents it from being accepted?

Thanks!

optionals.swift 
struct Book {
    let title: String
    let author: String
    let price: String?
    let pubDate: String?

    init?(book: [String : String]) {
      guard let title = book["title"], let author = book["author"] else {
        return nil
      }
      let price = book["price"]
      let pubDate = book["pubDate"]

      self.title = title
      self.author = author
      self.price = price
      self.pubDate = pubDate
    }
}

1 Answer

Dan Lindsay
Dan Lindsay
39,611 Points
Dan Lindsay
Dan Lindsay
39,611 Points

Hey David,

It looks like you used "book" instead of "dict"(which the challenge asks for you to use as the name) as your argument name. All your code is great, just need to switch "book" with "dict" in all places in the init method and you will pass the challenge.

Dan