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iOS Swift Functions and Optionals Optionals What is an Optional?

Jan Francírek
Jan Francírek
1,766 Points

Where do I have a mistake ?

Hi,

can someone give me an advice where do I have a mistake here?

Thank you

Jan

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)")
}
Jan Francírek
Jan Francírek
1,766 Points

That objective was to modife that ,,if let,, so that mistake is somewhere there down.

1 Answer

Daniel Johnson
Daniel Johnson
104,132 Points

You're missing an argument label name: in the call to the search function, and only print out the string "Found" instead of "Found \(result)".

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(name: "Doc") {
    println("Found")
}
Jan Francírek
Jan Francírek
1,766 Points

Thank you,

and why do I have to type: name name: String (#name)?

Daniel Johnson
Daniel Johnson
104,132 Points

Yeah, the # in the (#name: String) is how you add an argument label.