需要一些正则表达式帮助JavaScript

Question

I am hoping that someone can help me, I am using Javascript and asp

I have this string /folder1/folder2/pagename.asp

I need a regex to strip the /pagename.asp from the string

pagetype.replace(/\/.*?\.asp/ig, '');

The regex above is halfway there but the problem is that it strippes from the beginning / everything between the / and the .asp

how do I make the regex lazy so that it will only strip between the last / and the .asp?

Any help would be appreciated!

Answer 1

/(.*)\/.*?\.asp/ig

The problem is that the regex is matching as early as possible - one solution is to put a greedy quantifier at the start so that it gobbles up all the possible early matches and you get the last one.

And we use a capturing group to grab that bit so we can keep it around.

Answer 2

Try this:

pagetype.replace(/\/[^\/]*\.asp/ig, '');

I've used [^\\/] group to represent any symbol not equal to / .

Answer 3

确定使用此方法，将删除页面名称和扩展名：

(\w+)(\.\w+)(:[0-9]+)?(/.+)?