From a234ac87b806930d14b617adfb24109dbf4e73c2 Mon Sep 17 00:00:00 2001
From: LiDonglin <4388193@qq.com>
Date: Tue, 30 Jan 2018 16:25:25 +0800
Subject: [PATCH] Fix warning on SectionList's tutorial

---
 docs/docs/0.51/using-a-listview.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/docs/0.51/using-a-listview.md b/docs/docs/0.51/using-a-listview.md
index 03fcd97..bf5606e 100644
--- a/docs/docs/0.51/using-a-listview.md
+++ b/docs/docs/0.51/using-a-listview.md
@@ -66,6 +66,7 @@ export default class SectionListBasics extends Component {
           ]}
           renderItem={({item}) => <Text style={styles.item}>{item}</Text>}
           renderSectionHeader={({section}) => <Text style={styles.sectionHeader}>{section.title}</Text>}
+          keyExtractor={(item, index) => index}
         />
       </View>
     );