Say I have a string in Perl I am trying to match and replace with stuff:
$string =~ s/[^a-zA-Z]$find[^a-zA-Z]/$replace/g;
So as shown, I want to replace everything that is surrounded on both sides by nonletter characters. However, when I replace the string, I do NOT want to also replace these characters: they are just necessary for correct matching. How can I tell the Perl regex to avoid replacing the things surrounding $find
?
将它们存储为匹配的组,并在替换字符串中引用它们:
$string =~ s/([^a-z])$find([^A-Z])/\1$replace\2/gi;
使用环顾断言 。
s/(?<=[^a-zA-Z])$find(?=[^a-zA-Z])/$replace/g
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.