Extracting unique numbers from string in R

Question

I have a list of strings which contain random characters such as:

list=list()
list[1] = \"djud7+dg[a]hs667\"
list[2] = \"7fd*hac11(5)\"
list[3] = \"2tu,g7gka         


        

Answer 1

A stringr solution with str_match_all and piped operators. For the first solution:

library(stringr)
str_match_all(ll, "[0-9]+") %>% unlist %>% unique %>% as.numeric

Second solution:

str_match_all(ll, "[0-9]") %>% unlist %>% unique %>% as.numeric

(Note: I've also called the list ll)