\ D与[0-9]在.NET正EX pressions [英] \d versus [0-9] in .NET regular expressions

问题描述

我经常看到 [0-9] 在堆栈溢出，而不是 \ D 。我问为什么，答案往往是 \ D 匹配不仅仅是 [0-9] 。那么还有什么它匹配？ 此表说，它匹配十进制数字。又是怎么回事 \ p {钕} ？

I often see [0-9] used in .NET regular expression answers on Stack Overflow instead of \d. I’ve asked why, and the answer tends to be "\d matches more than just [0-9]". So what more does it match? This table says it matches decimal digits. And what about \p{Nd}?

或者是有没有什么区别，这是因为一些其他的正则表达式引擎的只是好的做法呢？

Or is there no difference, and this is just good practice because of some other regex engine?

推荐答案

我想答案也是在的链接引用：

\ d匹配任何十进制数字。它等效于\ p {钕}定期   EX pression模式，包括标准的十进制数字0-9 作为   以及一些其他字符集的十进制数字

\d matches any decimal digit. It is equivalent to the \p{Nd} regular expression pattern, which includes the standard decimal digits 0-9 as well as the decimal digits of a number of other character sets.

所以 \ D 可以匹配像十进制数字在阿拉伯字符集，这将不会与匹配[0-9] 。

So \d can match things like decimal digits in the Arabic character set, which wouldn't be matched with [0-9].

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