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iOS Swift 2.0 Enumerations and Optionals Introduction to Optionals Nil Values in Collections

surya m
surya m
404 Points
Posted by surya m
surya m
404 Points

don't know whats wrong with my code

Since dictionaries return optional values, you will have to use an if let statement to unwrap each consecutive operation.

optionals.swift 
let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LÊa Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]

var leadActor: String = "0"

// Enter code below
if let movie = movieDictionary["Spectre"],
   let leadingActor = movie["cast"] {
   print(leadingActor)
}

2 Answers

Damien Watson
Damien Watson
27,419 Points
Damien Watson
Damien Watson
27,419 Points

Hi, you're missing the { and need to set the leadActor

let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LÊa Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]

var leadActor: String = ""

if let movie = movieDictionary["Spectre"] {
   if let cast = movie["cast"] {
      leadActor = cast[0]
   }
}
tafadzwa chipunza
tafadzwa chipunza
1,678 Points
tafadzwa chipunza
tafadzwa chipunza
1,678 Points

hi, this worked for me

   if let movieTitle = movieDictionary ["Spectre"], let movieActors = movieTitle["cast"]{
    leadActor = movieActors[0]
}