Windows 10, Emacs 25.1, Dired+, xah-find
I use package xah-find for find/replace text in many files. OK. It's work. If I want to find in all java files I use the next regexp:
File path regex: \.java\'
OK. It's work. But if I want in files with the next extensions:
.java, .xml, .properties
What regexp must be? '
xah-find uses emacs regular expressions (regexps).
Regexps support the or operator with \|. The elisp regexp \.java\|\.xml matches .java OR .xml. Furthermore there are \( and \) for grouping. Therefore you could choose \.\(java\|xml\|properties\)\' as regexp for your special use case.
Side note: If for any reason saving the subexpression of the group has to be avoided one can also use a silent group \.\(?:java\|xml\|properties\)\'.
