How to get Apple Watch Unique id or UDID programmatically?

Ray Wenderlich's site has a tutorial called "How to Install iOS 9 and watchOS 2" and it has a "Using Xcode to Get Your Device’s UUID" section.

Not programmatically, no.

There is an equivalent for identifierForVendor in watchOS that can be used to generate a unique ID.

if let uuid = WKInterfaceDevice.current().identifierForVendor?.uuidString {
	print("UUID is",uuid)
}