rustHow to get a capture group using Rust regex?
Capture groups are used to extract parts of a string that match a regular expression pattern. In Rust, capture groups are created using the capture_group
method of the Regex
struct.
Example code
let re = Regex::new(r"(\d{4})-(\d{2})-(\d{2})").unwrap();
let caps = re.capture_group("2020-01-01").unwrap();
Output example
[("2020-01-01", "2020", "01", "01")]
Code explanation
Regex::new(r"(\d{4})-(\d{2})-(\d{2})")
: creates a newRegex
struct with a regular expression pattern that matches a 4-digit year, followed by a 2-digit month, followed by a 2-digit day.capture_group("2020-01-01")
: uses theRegex
struct to capture the parts of the string that match the regular expression pattern.
Helpful links
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