使用REGEX提取部分字符串

Question

我需要使用REGEX从下面的字符串中提取以下内容，任何人都可以帮忙

String = "[payment is made within [ 10  ] Business Days  of its due date.]"

输出：

[ 10  ] Business Days

Answer 1

请尝试这个。

s/^\[payment is made within (\[ [0-9]* \]) Business Days.*$/\1 Business Days/