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iOS Swift Functions and Optionals Optionals What is an Optional?

Posted by Vincent Day
Vincent Day
578 Points

Not sure what the error is here. I'm getting - Bummer! You need to define a `func` named `search` that retruns an opti

This program runs when I do it in XCode. Any ideas of what I'm doing incorrectly?

search.swift 
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("Doc"){
    println("Found: \(result)")
}
Steve Hunter
Steve Hunter
57,712 Points

You're returning nil is that right?

It is syntactically correct so Xcode won't moan about it, but it won't pass the challenge.

Hope that helps, else shout and I'll work through it.

Steve.

Steve Hunter
Steve Hunter
57,712 Points

Just looking at it now ... understand why you return nil.

Must look at the challenge before commenting!!

Steve.

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hi Vincent,

You pretty much did all this. Just one little issue with the name: seemingly being required and it asks for "Found" to be output solely. That sometimes makes the difference between right and wrong. 

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")
}