From 3c8961705da400270464bdb257d89b6f343b1955 Mon Sep 17 00:00:00 2001
From: yuzmb <744245329@qq.com>
Date: Fri, 22 Sep 2017 16:41:38 +0800
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@@ -19,7 +19,7 @@ var web_development = "python php ruby javascript jsonp perhapsphpisoutdated";
 
 开始这门课之前，大家先去看两篇文章。
 
-《正则表达式30分钟入门教程》：http://deerchao.net/tutorials/regex/regex.htm
+《正则表达式30分钟入门教程》：https://www.gitbook.com/book/luke0922/learnregularexpressionin30minutes/details
 
 上面这篇介绍了正则表达式的基础知识，但是对于零宽断言没有展开来讲，零宽断言看下面这篇：