Question

How to match the first word after an expression in a string using RegEx with Rust

Answer 1

use regex::Regex;

fn find_next_word(text: &str, expression: &str) {
    // Safely build the regex pattern by escaping special characters
    let pattern = format!(r"{}[\s]+(\w+)", regex::escape(expression));
    let re = Regex::new(&pattern).unwrap();

    if let Some(caps) = re.captures(text) {
        println!(
            "The first word after '{}' is: {}",
            expression,
            &caps[1]
        );
    } else {
        println!("No match found!");
    }
}

fn main() {
    let text = "The quick brown fox jumps over the lazy dog.";
    let expression = "fox";

    find_next_word(text, expression);
}

   
    
/*
run:
    
The first word after 'fox' is: jumps
    
*/

 

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