On 4 Dec 2018, at 13:29, Hans van der Meer <havdmeer@ziggo.nl> wrote:

> I am trying to extract something from a string with a \directlua call, the last word of a string in case:
> 
> 	\directlua{tex.print(string.match(“This is a string","%s%a$"))}
> 
> However, the %s%a are not working with the TeX-error “unfinished string near eof”. Obviously caused by the %’s.
> How to get this working? \textpercent will not do, off course within Luacode.

Also I tried to no avail

\begingroup\catcode`\%=12\relax\directlua{tex.print(string.match(“This is a string","%s%a$"))}\endgroup

dr. Hans van der Meer