rustHow to use regex to match a group in Rust?

Regex (regular expressions) can be used to match a group in Rust. To do this, you need to use the regex crate.

Example code

extern crate regex;
use regex::Regex;

fn main() {
    let re = Regex::new(r"(\w{5})").unwrap();
    let text = "The quick brown fox";
    for cap in re.captures_iter(text) {
        println!("{}", &cap[1]);
    }
}

Output example

quick
brown
fox

Code explanation

• extern crate regex;: imports the regex crate.
• use regex::Regex;: imports the Regex type from the regex crate.
• let re = Regex::new(r"(\w{5})").unwrap();: creates a new Regex object with the pattern (\w{5}).
• let text = "The quick brown fox";: creates a string to match against.
• for cap in re.captures_iter(text) {: iterates over the captures of the Regex object.
• println!("{}", &cap[1]);: prints the capture group.

Helpful links

• Regex crate documentation
• Rust regex tutorial

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