From b42e54f13fa544fffa1984ff172561785683b615 Mon Sep 17 00:00:00 2001
From: MaximilianDauner <maximilian.dauner@htwg-konstanz.de>
Date: Fri, 23 Mar 2018 20:13:13 +0100
Subject: [PATCH] Used the zip function to iterate over both vectors
 simultaneously instead of an index variable and unwrapping the result.

---
 components/script/dom/gamepadbuttonlist.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/components/script/dom/gamepadbuttonlist.rs b/components/script/dom/gamepadbuttonlist.rs
index 46f69fb97ad..24afa3b1bfe 100644
--- a/components/script/dom/gamepadbuttonlist.rs
+++ b/components/script/dom/gamepadbuttonlist.rs
@@ -37,10 +37,8 @@ impl GamepadButtonList {
     }
 
     pub fn sync_from_vr(&self, vr_buttons: &[WebVRGamepadButton]) {
-        let mut index = 0;
-        for btn in vr_buttons {
-            self.list.get(index).as_ref().unwrap().update(btn.pressed, btn.touched);
-            index += 1;
+        for (gp_btn, btn) in self.list.iter().zip(vr_buttons.iter()) {
+            gp_btn.update(btn.pressed, btn.touched);
         }
     }
 }