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iOS Swift Functions and Optionals Optionals What is an Optional?

Posted by Marco Garduño
Marco Garduño
1,549 Points

help

help

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   {
println ("Found")
}

search("Doc")

1 Answer

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi Marco,

You have a few issues with your IF statement and the random search statement that appears after it.

  • You have written search in your IF statement but haven't called the function
  • When calling a function that specifies a named parameter, the label needs to be part of the function call
  • The last line referencing the search function doesn't need to be there

All you need is the following:

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

Hope that helps.