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iOS Build a Playlist Browser with Swift Building the Music Library and Playlist Models Passing the Playlist Object

Posted by Esteban Orozco
Esteban Orozco
2,191 Points

Why the playlist != nil for the optional? Is this the new syntax? We were taught another way to handle this by Amit.

We were taught before to handle it in an if-statement.

Hayden Pennington
Hayden Pennington
6,154 Points
Hayden Pennington
Hayden Pennington
6,154 Points

Previously, in Swift, a non nil optional would implicitly evaluate to true, and a nil optional would implicitly evaluate to false. For clarity, Apple changed that, to avoid confusion with optional Bool values. It just helps make a developers intent clearer.

Here is a link to the Swift revision history, as well as the Swift language Guide. https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/RevisionHistory.html