Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Swift 2.0 Enumerations and Optionals Introduction to Optionals Initializing Optional Values

Compiler errors on failable initializer

I am getting compiler errors on this. I'm trying to copy emulate the code found here


at 4:35, but the compiler keeps giving me problems with the guard statement. I feel like this is a syntax error, but the errors keep recommending "where" statements, which I've never heard of, or use of the !, which the lesson explicitly instructed against using. So I'm a little lost. Any help at all would be appreciated. Thanks!

struct Book {
    let title: String
    let author: String
    let price: String?
    let pubDate: String?

    init?(dict: [String: String]) {

      guard let self.title = dict["title"], self.author = dict["author"] else {
        return nil

      self.price = dict["price"]
      self.pubDate = dict["pubDate"]

1 Answer

Hi everyone. I apologize for the duplicate. This question is answered here and I have passed the challenge.