Swift 2 Optionals

In this free episode, we take a look at a core Swift 2 feature: Optionals. Unlike Objective-C, where nil is considered a no-op, in Swift nil is specifically recognized by the compiler, which forces you to handle cases where nil might be present in a variable.

This is a companion discussion topic for the original entry at https://nsscreencast.com/episodes/191-swift-2-optionals