// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)(?<![^,\r\n])(?=,|$)").unwrap();
let string = "ABC,XYZ,LMN
0,,2.3
3.4,3,5
,0,
1.3,,4.5
-------------------------
ABC,XYZ,LMN
0,,2.3
3.4,3,5
,,0
1.3,,";
let substitution = "0";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/