这个正则表达式的输出是什么[重复]

Question

这个问题在这里已有答案：

• Reference - What does this regex mean? 1回答

这个正则表达式的输出是什么？

/\s+(\d+)\s+/

特别是/ \ s的含义是什么

Answer 1

在你的正则表达式中，\s+按顺序匹配任意数量的空格，/d+按顺序匹配任意数量的数字。

\s和\d分别匹配单个空格和单个数字，+使它分别匹配任意数量的连续空格和数字。

Answer 2

你可以在regex101.com找到完整的解释。

/\s+(\d+)\s+/

\s+ matches any whitespace character (equal to [\r\n\t\f\v ])
+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

1st Capturing Group (\d+)

\d+ matches a digit (equal to [0-9])

+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

\s+ matches any whitespace character (equal to [\r\n\t\f\v ])

+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

Answer 3

https://regex101.com/

可能有用：D

\ s +（\ d +）\ s + /↵匹配字符↵字面（区分大小写）\ s +匹配任何空格字符（等于[\ r \ n \ t \ f \ v]）+量词 - 匹配一次和无限次，尽可能多次，根据需要回馈（贪婪）第一捕获组（\ d +）\ d +匹配一个数字（等于[0-9]）+量词 - 匹配一次和无限次，尽可能多次，根据需要回馈（贪婪）\ s +匹配任何空白字符（等于[\ r \ n \ t \ f \ v]）+量词 - 匹配一次和无限次，尽可能多次，根据需要回馈