rustHow to match a string with regex in Rust?
Matching a string with regex in Rust is done using the regex
crate. To use it, you must first add it to your Cargo.toml
file.
[dependencies]
regex = "1.3.9"
Then you can use the regex
crate in your code.
extern crate regex;
use regex::Regex;
fn main() {
let re = Regex::new(r"\d+").unwrap();
let text = "The answer is 42";
println!("{}", re.is_match(text));
}
The code above will print true
to the console, since the regex \d+
matches the number 42
in the string The answer is 42
.
The code consists of the following parts:
extern crate regex;
- This line imports theregex
crate.use regex::Regex;
- This line imports theRegex
type from theregex
crate.let re = Regex::new(r"\d+").unwrap();
- This line creates a newRegex
object from the given regex pattern.let text = "The answer is 42";
- This line creates a string to match against.println!("{}", re.is_match(text));
- This line prints the result of the regex match to the console.
For more information, see the Regex documentation.
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