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iOS Swift Functions and Optionals Parameters and Tuples Tuples

True Pixels
True Pixels
3,178 Points
Posted by True Pixels
True Pixels
3,178 Points

I'm stuck on Stage 2 "Parameters and Tuples"

The question was: Using the println statement, print out the value of the language element from the result tuple.

And when i did this code, it kept on saying an error message which said:

"invalid redeclaration of 'result'" & "Use of unresolved identifier 'language'"

I have rewatched the video, but i couldn't find anything about this, so i tried doing what i could possibly think of but none of that worked, so if someone could help me that would be great :)

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

//only pass a person to the function
var result = greeting("Tom")

println("language = \(language)")

3 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

the swift eBook states:

If you name the elements in a tuple, you can use the element names to access the values of those elements:

and provides the following example:

let http200Status = (statusCode: 200, description: "OK")
println("The status code is \(http200Status.statusCode)")

so you use dot syntax to access named tuple elements

tupleName.elementName

so to access the language element you would use

println(result.language)

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

    return (greeting,language)
}

var result = greeting("Tom")

println(result.language)
Gilroy Timoty Graham
Gilroy Timoty Graham
Courses Plus Student 1,916 Points
Gilroy Timoty Graham
Gilroy Timoty Graham
Courses Plus Student 1,916 Points

hi, i didn't understand this:

println(result.language)

why its result.language not greeting.language, because the func was greeting()?

thank you ;)

True Pixels
True Pixels
3,178 Points
True Pixels
True Pixels
3,178 Points

Oh, i thought i tried that, i guess i forgot the add the "()"'s