Course of Raku / Regexes and grammars / Regexes / Captures / Positional captures
Quiz — Positional captures
What does the following program print?
if 'ab-cd' ~~ / (\w+) '-' (\w+) / {
say $1;
}| 0 | ｢ab｣ |
| 1 | ｢cd｣ |
| 0 | ｢ab-cd｣ |
| 0 | ｢-｣ |
The two pairs of brackets capture into $0 and
$1, numbered from zero. The first captures ab,
the second captures cd, so $1 is
｢cd｣.