https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp RegExp https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp 字面量, 构造函数和工厂符号都是可以的： /pattern/flags // 字面量: 模式 标志 new RegExp(pattern [, flags]) // 构造函数: 模式 标志 RegExp(pattern [, flags]) // 工厂符号:​​​​​​​ 模式 标志​​​​​​​

(group) $1 === group1 $2 === group2 $3 === group3

[one of] {times} \d = 0-9

https://regexper.com https://regexper.com/#%5E(%5Ba-zA-Z0-9_-%5D)%2B%40(%5Ba-zA-Z0-9_-%5D)%2B((%5C.%5Ba-zA-Z0-9_-%5D%7B2%2C3%7D)%7B1%2C2%7D)%24

find ./ -name *.txt man find find -H find -L https://ss64.com/bash/find.html http://www.tldp.org/LDP/abs/html/moreadv.html Linux bash shell

Regular Expression

find ./-name *.txt