[Txr-users] use regex in filter?

[苏灵]

I am new to TXR. Txr is a powerful tool that make things simple. filter is amazing, but when i want to use regex in filter to do some replacement, i don't know how to implement.
Is it possible to use regex in filter? If it is ,how?

BTW, some directives is not easy to understand, more example will help. Also, i saw some txr code writen by you on stackoverflow, some of them are very edifying. Why not add a txr tag on your code, it will be very convenient for someone searching for  txr codes.

ps. Example isnot another way to teach, it is the only way to teach.      ---Albert Einstein

phylixal