rustHow to find the first match in a Rust regex?

The find method of the Regex type can be used to find the first match in a Rust regex.

Example code

let re = Regex::new(r"\d+").unwrap();
let text = "123 456 789";

let first_match = re.find(text).unwrap();
println!("{:?}", first_match);

Output example

Some((0, 3))

Code explanation

1. let re = Regex::new(r"\d+").unwrap();: This line creates a new Regex object from the given pattern. The unwrap method is used to handle any errors that may occur.

2. let text = "123 456 789";: This line creates a String object containing the text to be searched.

3. let first_match = re.find(text).unwrap();: This line calls the find method of the Regex object to find the first match in the given text. The unwrap method is used to handle any errors that may occur.

4. println!("{:?}", first_match);: This line prints the result of the find method.

Helpful links

• Rust Regex Documentation

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