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Aryaman Dhingra
3,536 PointsHow to get optional values from nested dictionaries?
I don't understand optional values very well, I just need some clarification on how to get optional values from the nested dictionaries. I would also like to know what I am doing wrong.
let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LĂ©a Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]
var leadActor: String = ""
// Enter code below
if let movieCast = movieDictionary["Spectre"], let movieFullCast = movieCast["cast"] {
print(movieFullCast[0])
}
2 Answers
tromben98
13,273 PointsHi!
You are just printing the lead actor instad of assigning it to the leadActor property.
Here is the solution:
let movieDictionary = ["Spectre": ["cast": ["Daniel Craig", "Christoph Waltz", "LĂ©a Seydoux", "Ralph Fiennes", "Monica Bellucci", "Naomie Harris"]]]
var leadActor: String = ""
// Enter code below
if let movie = movieDictionary["Spectre"],
let cast = movie["cast"] {
leadActor = cast[0]
}
Daniel Walkowski
549 PointsYou are not checking for the implicit optionals. All dictionaries and Arrays contain Optional keys/elements.
If I am incorrect, please enlighten me.
I'd like to see an optional chaining solution. I'm trying to write one now