R: Find the last dot in a string

Question

In R, is there a better/simpler way than the following of finding the location of the last dot in a string?

x <- \"hello.world.123.456\"
g <- gregexpr(         


        

Answer 1

Someone posted the following answer which I really liked, but I notice that they've deleted it:

regexpr("\\.[^\\.]*$", x)

I like it because it directly produces the desired location, without having to search through the results. The regexp is also fairly clean, which is a bit of an exception where regexps are concerned :)