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iOS Swift Functions and Optionals Parameters and Tuples Tuples

Zachary Goforth
Zachary Goforth
748 Points
Posted by Zachary Goforth
Zachary Goforth
748 Points

How do I pass Challenge Task 2 on tuples?

I recieved this error...

Your function needs to return a tuple with elements named 'greeting' and 'language'

What am I doing wrong?

tuples.swift 
func greeting(person: String) -> (language: String, greeting: String, result: String) {
    let language = "English"
    let greeting = "Hello \(person)"
    var result = greeting(person:"Tom") 

    return (greeting, language) 
}

3 Answers

johnhenri
johnhenri
42,259 Points
johnhenri
johnhenri
42,259 Points

Just create the variable called result under the function and store the return value of the function in it, like this:

func greeting(person: String)  -> (greeting: String, language: String)  {
    let language = "English"
    let greeting = "Hello \(person)"

    return  (greeting, language)
}

var result = greeting("Tom")
johnhenri
johnhenri
42,259 Points

Glad to help

David Magaña
David Magaña
4,170 Points
David Magaña
David Magaña
4,170 Points

Hi, on that part of the challenge you do not have to worry about print the result, all you have to do is: what are you going to return?, in this case is only the greeting and language, just delete the result part:

func greeting(person: String) -> (language: String, greeting: String) {
    let language = "English"
    let greeting = "Hello \(person)"

    return (greeting, language) 
}
Gunnar Magholder
Gunnar Magholder
1,063 Points
Gunnar Magholder
Gunnar Magholder
1,063 Points

Hi Zachary,

you are calling a function inside a function (the call to greeting sits inside the greeting function itself).

Though this is a common concept in functional languages (like LISP, Haskell, etc.) you should only use this type of call in a recursion, that is a function calling itself but at some point in time it is terminating itself instead of calling itself over and over again. By now, I don't know if and why Swift implements recursive functions. So better keep your head out of this, that is don't call a function inside itself (you can call other functions though)