rustHow do I use regex with strings in Rust?

Regex (regular expressions) can be used to match patterns in strings in Rust. To use regex, you need to import the regex crate.

extern crate regex;

use regex::Regex;

You can then create a Regex object with the pattern you want to match.

let re = Regex::new(r"\d+").unwrap();

You can then use the is_match method to check if the pattern matches a string.

assert!(re.is_match("123"));

You can also use the find method to find the first match of the pattern in a string.

let text = "123 456";
let caps = re.find(text).unwrap();
assert_eq!(&text[caps.start()..caps.end()], "123");

For more information, see the Regex documentation.