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iOS Swift Functions and Optionals Optionals What is an Optional?

Posted by Ramiro Aguirre
Ramiro Aguirre
Courses Plus Student 16,725 Points

Optionals issue

The search function below returns a name if it is found in the array and an empty string if it is not found. Modify the search function to return an optional instead of just a String. In addition, you have to make sure the function returns a nil if the name is not found in the array.

this is what i have so far:

func search(#name: String) -> String { let names = ["Doc","Grumpy","Happy","Sleepy","Bashful","Sneezy","Dopey"] for n in names { if n == name { return n } } return "" }

if let something = search(name: "Doc") { println("Name Found: (something)") }

and i get

Bummer! You need to define a func named search that retruns an optional using the String?.

1 Answer

Ramiro Aguirre
Ramiro Aguirre
Courses Plus Student 16,725 Points

oh never mind i just figured it out

i just added a "?" after ->String? like that and then change the return value tu be nil and then changed the name in the if statment to Snow White and that did it :)

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 something = search(name: "Snow White") { println("Name Found: (something)") }