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 Enumerations and Optionals in Swift Introduction to Optionals Initializing Optional Values

Shade Wilson
Shade Wilson
9,002 Points

Getting "Bummer! Your code could not be compiled" even though the code is compiling. What am I doing wrong here?

I am unsure what I am doing wrong and why I am getting an error from TreeHouse even though there is no compiler error and seems to run fine in Playground.

Any help/pointers would be much appreciated!

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

    init?(dictionary dict: [String : String]) {
      if let title = dict["title"], let author = dict["author"] {
        self.price = dict["price"]
        self.pubDate = dict["pubDate"]
        self.title = title
        self.author = author
      } else {
        return nil


1 Answer

Jonathan Ruiz
Jonathan Ruiz
2,998 Points

Hi shade you almost got it! All you need is to remove the external name dictionary in the fail-able initializer and it'll pass.