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

Tyler Dotson
PLUS
Tyler Dotson
Courses Plus Student 1,740 Points

I am just lost.

This concept is just really confusing me.

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

}

init?(dict: [String : String]) {
    return nil
}

I think if you add this it should work. Also put the initializer inside the struct.

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"]
}

3 Answers

Jeff McDivitt
Jeff McDivitt
23,970 Points
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"]
    }

}

Did that work for you?

Jeff McDivitt
Jeff McDivitt
23,970 Points

Yeah does it not for you?

Oh, sorry I was just making sure Tyler Dotson got it.