rustHow to parse a file with Rust regex?

Parsing a file with Rust regex is a powerful way to extract data from a file. The regex crate provides a powerful set of tools for matching and extracting data from strings.

Example code

use regex::Regex;

let re = Regex::new(r"\d+").unwrap();
let text = "The answer is 42";

for cap in re.captures_iter(text) {
    println!("{}", &cap[0]);
}

Output example

42

The code above uses the Regex::new function to create a new Regex object from a string. The captures_iter method is then used to iterate over all the matches in the string. The &cap[0] expression is used to access the matched string.

Code explanation

• Regex::new: This function creates a new Regex object from a string.
• captures_iter: This method is used to iterate over all the matches in the string.
• &cap[0]: This expression is used to access the matched string.

Helpful links

• Rust Regex Documentation

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