How to use R to extract the file name in the absolute path

Question

x <- 'D:/r4ds/map.json/baishan.json'

I just wanna get "baishan".How can I realize it?

Answer 1

You use basename + file_path_sans_ext from tools.

x <- 'D:/r4ds/map.json/baishan.json'
tools::file_path_sans_ext(basename(x))
#[1] "baishan"

---

Using pure regex :

sub('.*/(.*)\\..*', '\\1', x)

This extracts everything after last "/" till the following dot (".").

Answer 2

We can do

sub('.*/([^/.]+).*', "\\1", x)
#[1] "baishan