From e10a2dadd3c0531bc13ead8d80fddb2df51afed1 Mon Sep 17 00:00:00 2001
From: Prodesire <prodesire@yeah.net>
Date: Sun, 26 Nov 2017 15:13:45 +0800
Subject: [PATCH] improve min method in common_prefix

---
 pydu/string.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydu/string.py b/pydu/string.py
index 4b90408..f911271 100644
--- a/pydu/string.py
+++ b/pydu/string.py
@@ -103,7 +103,7 @@ def strips(text, remove):
 
 def common_prefix(l):
     commons = []
-    for i in range(len(min(l, key=len))):
+    for i in range(min(len(s) for s in l)):
         common = l[0][i]
         for c in l[1:]:
             if c[i] != common: