This non-nested anchor group patterns has 2 match groups and extracts out two rows: a match for the 1 or 2 and a match for the 1024
(#[12]) (1024)
This has a nested anchor group pattern extracts one row with the first 1 or 2 but doesn't extract the 1024
(#(1|2)) (1024)
This non-nested anchor group patterns has 2 match groups and extracts out two rows: a match for the 1 or 2 and a match for the 1024
(#[12]) (1024)This has a nested anchor group pattern extracts one row with the first 1 or 2 but doesn't extract the 1024
(#(1|2)) (1024)