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

Mohamed Almulla
Mohamed Almulla
2,506 Points

My code is not compiling and I don't understand the reason

My code is not compiling and my compiler is suggesting I insert the word "case" and it's saying that the types do not match. Can someone help me, please?

optionals.swift
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 
     }
    self.price = dict["price"]
    self.pubDate = dict["pubDate"]
  }
}

1 Answer

You calling the constants you already created in your guard statement. It should be as below.

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

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

        self.title = title
        self.author = author
        self.price = dict["price"]
        self.pubDate = dict["pubDate"]
    }
}