正则表达式 p{L} 和 p{N} [英] Regular expression p{L} and p{N}

问题描述

我是正则表达式的新手，并获得了以下正则表达式:

I am new to regular expressions and have been given the following regular expression:

(p{L}|p{N}|_|-|.)*

我知道 * 是什么意思和 |表示或"并且 转义.

I know what * means and | means "or" and that escapes.

但是我不知道 p{L} 和 p{N} 是什么意思.我在谷歌上搜索过，没有结果......

But what I don't know what p{L} and p{N} means. I have searched Google for it, without result...

有人可以帮我吗?

推荐答案

p{L} 匹配类别字母"中的单个代码点.
p{N} 匹配任何脚本中的任何类型的数字字符.

p{L} matches a single code point in the category "letter".
p{N} matches any kind of numeric character in any script.

来源:regular-expressions.info

Source: regular-expressions.info

如果您要经常使用正则表达式，我建议将该站点加入书签，它非常有用.

If you're going to work with regular expressions a lot, I'd suggest bookmarking that site, it's very useful.

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