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

Posted by kelake
kelake
4,223 Points

if let statement

I have the correct answer, I just followed the pattern in the example, but what do I do with it? What happens next?

optionals.swift 
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 movieCast = movie["cast"] {
       leadActor = movieCast[0]
    }
}

1 Answer

Everton Carneiro
Everton Carneiro
15,994 Points
Everton Carneiro
Everton Carneiro
15,994 Points

If your questions is where you are gonna use this in real world projects, mainly to get data from the web through a JSON file. Since the data from the web may or may not receive data, you have to check if the data is available.