prevent crash if result is empty

mattneub · mattneub · commit 94b4f5ba138a · 2016-04-13T15:47:16.000-07:00
diff --git a/bk2ch16p678mediaQuery/ch29p946mediaQuery/ViewController.swift b/bk2ch16p678mediaQuery/ch29p946mediaQuery/ViewController.swift
@@ -135,6 +135,7 @@ class ViewController: UIViewController {
             print(album.representativeItem!.albumTitle!)
         }
         // and here are the songs in the first of those albums
+        guard result.count > 0 else {print("No sonatas"); return}
         let album = result[0]
         for song in album.items { //
             print(song.title!)

Original file line number	Diff line number	Diff line change
`@@ -135,6 +135,7 @@ class ViewController: UIViewController {`
`135`	`135`	`print(album.representativeItem!.albumTitle!)`
`136`	`136`	`}`
`137`	`137`	`// and here are the songs in the first of those albums`
	`138`	`+ guard result.count > 0 else {print("No sonatas"); return}`
`138`	`139`	`let album = result[0]`
`139`	`140`	`for song in album.items { //`
`140`	`141`	`print(song.title!)`