rustHow to use groups in a Rust regex?

Groups in Rust regex are used to capture parts of a string that match a certain pattern. They are defined by enclosing the pattern in parentheses.

Example

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

Code explanation

• Regex::new(r"(\w{5})"): creates a new Regex object with a pattern that matches any 5 word characters
• captures_iter(text): iterates over the text and captures any matches of the pattern
• &cap[1]: prints the first capture group, which is the 5 word characters

Helpful links

• Rust Regex Documentation
• Regex Cheat Sheet

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