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愣是没有想明白, 另外这也太多了吧
Java中类似py中rawString这种东西吗?js中也是这样?
疑惑链接见(http://blog.csdn.net/sunlovefly2012/article/details/45689435)
Java正则
尝试理解:转义-反斜杠本身-转义-反斜杠本身-->\\?然后\\-->\?? (主要是这里不懂)
转义-反斜杠本身-转义-反斜杠本身
\\
\
主要是这里不懂
小伙看你根骨奇佳，潜力无限，来学PHP伐。
Because this is first a java string, after escaping, it is two, and then after passing through the regular expression engine, it is considered to be one original backslash
\两个\表示一个，所以最好结果应该理解成\，这样就可以在正则表达式中匹配一个La.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Because this is first a java string, after escaping, it is two, and then after passing through the regular expression engine, it is considered to be one original backslash
\两个
\表示一个，所以最好结果应该理解成\，这样就可以在正则表达式中匹配一个
La.