Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.2k views
in Technique[技术] by (71.8m points)

regex - Regular Expression to match only one angle bracket

I'm looking for a regular expression that matches the '>' in

a > b
>
b>
...

but not two or more angled brackets, i.e. it should not match

a>>b
>>
b>>
...

I was sure to do that with lookaheads or lookbehinds, but for some reason neither

>(?!>)

nor

(?<!>)>

work..?

Thanks!

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Perl syntax:

/(?<!>)>(?!>)/

Without using lookahead or lookbehind:

/(?:^|[^>])>(?:[^>]|$)/

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...