From 7f525f825a6b7f276e03b7cb20d6948994d71b86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=85=83=E8=89=AF?= <yuanliang@dian.so>
Date: Mon, 17 May 2021 13:55:43 +0800
Subject: [PATCH] Use exist method to be consistent with Stack

---
 src/data-structures/queue/Queue.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/data-structures/queue/Queue.js b/src/data-structures/queue/Queue.js
index f6ec6d2dad..64e646fc00 100644
--- a/src/data-structures/queue/Queue.js
+++ b/src/data-structures/queue/Queue.js
@@ -21,7 +21,7 @@ export default class Queue {
    * @return {*}
    */
   peek() {
-    if (!this.linkedList.head) {
+    if (this.isEmpty()) {
       return null;
     }