From fcaf990c515ad253a4263af8a7813af8237e1e22 Mon Sep 17 00:00:00 2001
From: Luk <luk@faronear.org>
Date: Sun, 20 Oct 2024 19:48:31 +0800
Subject: [PATCH] u

---
 coretool.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/coretool.js b/coretool.js
index 925b59c..8d8a3a5 100644
--- a/coretool.js
+++ b/coretool.js
@@ -400,11 +400,10 @@ module.exports = {
   get_file_ext (filename = '') {
     const parts = filename.split('.')
     // 注意，'abc'.split('.') === ['abc']
-    let ext = ''
     if (parts.length >= 2) {
-      ext = parts.pop().toLowerCase()
+      return parts.pop().toLowerCase()
     }
-    return ext
+    return ''
 
     // 如果用 path.extname:
     // if (/^\./.test(filename)) filename = `added$filename` // path.extname('.abc') 结果为 ''，所以要添加前缀