From 8c75a9d12b7971c5a41a2a0a836fa4ca39756d4d Mon Sep 17 00:00:00 2001
From: szdytom <szdytom@163.com>
Date: Thu, 25 Mar 2021 14:32:25 +0800
Subject: [PATCH] [refactory] no magic number

---
 src/command.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/command.ts b/src/command.ts
index 2ffb141..83dde34 100644
--- a/src/command.ts
+++ b/src/command.ts
@@ -19,7 +19,7 @@ function unmask_room_name(name: string) {
     }
 
     if (name.startsWith('costum-room#')) {
-        return name.substring(12);
+        return name.substring('costum-room#'.length);
     }
 
     return null;