How to unwrap double optionals?

Question

How do you unwrap a string that is returned as:

(Optional(Optional \"blue\"))

var cityName = String()

if let cityAnno =         


        

Answer 1

I must say the accepted answer is very good, and I pefer method 1 from from that answer. However I'd like to use different syntax, making it a little more readable:

if case .some(.some(let value)) = a {
    print(value) // "hello\n"
}