From 148c02e7adfce5ba934b182cffea630cc63fea34 Mon Sep 17 00:00:00 2001
From: Jesse Squires <jessesquires@users.noreply.github.com>
Date: Mon, 13 Feb 2017 10:50:27 -0800
Subject: [PATCH] Update Best Practices and FAQ.md

---
 Guides/Best Practices and FAQ.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Guides/Best Practices and FAQ.md b/Guides/Best Practices and FAQ.md
index fdf9eefdb..c0e9db3ca 100644
--- a/Guides/Best Practices and FAQ.md	
+++ b/Guides/Best Practices and FAQ.md	
@@ -10,12 +10,21 @@ If this assert is ever hit, that means `IGListKit` has sent your section control
 This would only happen if your objects provide *non-unique* diff identifiers. 
 
 ```objective-c
+// Objective-C
 - (void)didUpdateToObject:(id)object {
     NSParameterAssert([object isKindOfClass:[MyModelClass class]]);
     _myModel = object;
 }
 ```
 
+```swift
+// Swift
+func didUpdate(to object: Any) {
+    precondition(object is MyModelClass)
+    myModel = object as! MyModelClass
+}
+```
+
 - Make sure your [`-diffIdentifier`](https://instagram.github.io/IGListKit/Protocols/IGListDiffable.html#/c:objc(pl)IGListDiffable(im)diffIdentifier) implementation returns a **unique identifier** for each object.
 
 - We highly recommend using single-item sections when possible. That is, each section controller manages a single model (which may have one or multiple cells). This gives you the greatest amount of flexibility, modularity, and re-use for your components.