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iOS Swift Functions and Optionals Optionals What is an Optional?

Totally stuck on optionals in swift for iOS

The question reads: 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

I made string be string? to make that an optional, but when I put my let findname = "Doc" it says change search("Doc") to "Doc" so I did that, and it still tells me the same thing. I dont understand.

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

let findname = "Doc"

1 Answer

Roberto Alicata
PLUS
Roberto Alicata
Courses Plus Student 39,959 Points

This is the right code:

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")
}