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

Paul Je
Paul Je
4,435 Points
Posted by Paul Je
Paul Je
4,435 Points

Help! Not sure how the syntax must be formatted in order to assign from nested array

Unsure; it says that I should be retrieving property 0 on nested array which in my case is castInMovies after combining it with movieTitle. There are no other error messages otherwise - any help would be appreciated!

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

var leadActor: String = ""

// Enter code below


if let movieTitle = movieDictionary["Spectre"],
    let castInMovies = movieTitle["cast"],
      var leadActor: String = castInMovies[0] {
      print(leadActor)
     } else {
     print("Whoops, this is not Daniel Craig! Maybe somebody else on this list")
     }

1 Answer

Cindy Lea
PLUS
Cindy Lea
Courses Plus Student 6,497 Points
Cindy Lea
Cindy Lea
Courses Plus Student 6,497 Points

Try this:

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

var leadActor: String = ""

// Enter code below

if let movie = movieDictionary["Spectre"] { if let cast = movie["cast"] { leadActor = cast[0] }

}

Parvinder Grewal
Parvinder Grewal
3,678 Points
Parvinder Grewal
Parvinder Grewal
3,678 Points

Cindy Lea , thanks for your answer. I was having trouble on how to assign position 0 after the unpacking.