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Update README.md
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alsotang authored Sep 24, 2017
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Expand Up @@ -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》:http://www.cnblogs.com/deerchao/archive/2006/08/24/zhengzhe30fengzhongjiaocheng.html

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:

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