Function taking a variable number of arguments

Question

In this document: https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html#//apple_ref/doc/uid/TP40014097-CH2

Answer 1

The type of parameter in sumOf are known as 'variadic' parameter. The parameters passed are accepted just as a group of elements and is then converted into array before using it within that function.

A great example would be this post.

Passing lists from one function to another in Swift

Answer 2

In case of all arguments are Int numbers: Int[] would be intuitive. But if you have code like this:

func foo(args:AnyObject...) {
    for arg: AnyObject in args {
        println(arg)
    }
}

foo(5, "bar", NSView())

output:

5
bar
<NSView: 0x7fc5c1f0b450>