Commits
David Li authored and Yibo Cai committed 022dd636150
ARROW-12717: [C++][Python] Add find_substring kernel This adds a very simple lfind kernel. If the substring is not found, -1 is reported. Nulls are propagated. Regexes are not supported, nor is rfind. Closes #10353 from lidavidm/arrow-12717 Authored-by: David Li <li.davidm96@gmail.com> Signed-off-by: Yibo Cai <yibo.cai@arm.com>