vim如何替换反斜杠和＆

Question

I am using vim and I want to replace
&\\\\ \\hline to \\\\ \\hline Can somebody teach me how to do this? %s/\\&\\\\/\\\\/gc didn't work. this is for latex table.

Answer 1

Inside the search pattern, you don't need to escape & ( \\& is a special atom for branches), but \\ needs to be doubled. In the replacement part , a & would have to be escaped, just like the \\ (yes, this is a bit complex, unfortunately). So, this would work:

:%s/&\\\\/\\\\/gc

If you want to assert the following \\hline , too, it's simpler to end the matching with \\ze (but still assert that the following part is there); this avoids having to duplicate the part that should be kept (or alternatively capture and re-insert it in the replacement):

:%s/&\ze\\\\ \\hline//gc