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Joyce Ryu
1,124 PointsChallenge Task of Optional Quiz
can anyone explain what is wrong with my code? and also explain about the optionals?
func search(#name: String) -> String? {
let names = ["Doc","Grumpy","Happy","Sleepy","Bashful","Sneezy","Dopey"]
for n in names {
if n == name {
return n
}
}
return nil
}
if let result = search(name: "DOC") {
println("Found")
}
1 Answer
Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Pointswhen you called the "search" function at the bottom, you asked it to find "DOC" instead of "Doc", and it is case sensitive, so it didn't match, and didn't print out "Found".
Optionals are a data type that can contain something, or be nil - contain nothing. In this case, the "String?" type can be a string or it can be nil. In this case, there's a possibility that you could ask for a name, and there would be no match. You also need to check to see if there's a value inside an optional before "unwrapping" it, otherwise your program could crash.