Commits
Nic Crane authored and Ian Cook committed 5433678dc58
ARROW-12868: [R] Bindings for find_substring and find_substring_regex Closes #10588 from thisisnic/ARROW-12868_str_locate Lead-authored-by: Nic Crane <thisisnic@gmail.com> Co-authored-by: Ian Cook <ianmcook@gmail.com> Signed-off-by: Ian Cook <ianmcook@gmail.com>