Update structure-collections.md (#190)

Horat1us · samdark · commit 019d7dcdb09e · 2018-04-16T13:18:44.000+03:00
diff --git a/book/structure-collections.md b/book/structure-collections.md
@@ -34,7 +34,7 @@ class PostCollection implements \Countable, \IteratorAggregate
     {
         foreach ($data as $item) {
             if (!$item instanceof Post) {
-                throw new \InvalidArgumentException('All items should be of Post class.');
+                throw new \InvalidArgumentException('All items should be instance of Post class.');
             }
         }
         $this->data = $data;

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@ class PostCollection implements \Countable, \IteratorAggregate`
`34`	`34`	`{`
`35`	`35`	`foreach ($data as $item) {`
`36`	`36`	`if (!$item instanceof Post) {`
`37`		`- throw new \InvalidArgumentException('All items should be of Post class.');`
	`37`	`+ throw new \InvalidArgumentException('All items should be instance of Post class.');`
`38`	`38`	`}`
`39`	`39`	`}`
`40`	`40`	`$this->data = $data;`