Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
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 84,735 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.