What language level support (if any) does Swift have for asynchronous programming?

Question

Asynchronous programming is a must for responsive user interfaces when application have to communicate over unpredictable networks (e.g. smart phone applications). The user i

Answer 1

Swift's approach to asynchronous programming is the same as Objective C's: use Grand Central Dispatch. You can pass closures to gcd dispatch_ functions, just as in ObjC. However, for aesthetic reasons, you can also pass your closure (block) after the close parentheses:

dispatch_async(dispatch_get_main_queue()) {
    println("async hello world")
}