How to get random element from a set in Swift?

Question

As of Swift 1.2, Apple introduces Set collection type.

Say, I have a set like:

var set = Set(arrayLiteral: 1, 2, 3, 4, 5)
         


        

Answer 1

If you want a 'random' element from a Set then you use:

/// A member of the set, or `nil` if the set is empty.
var first: T? { get }

Get the 0th index or the 1,000,000th index makes no difference - they are all an arbitrary object.

But, if you want repeated calls to return a likely different element each time, then first might not fit the bill.