Remove single trailing newline from String without cloning

Question

I have written a function to prompt for input and return the result. In this version the returned string includes a trailing newline from the user. I would like to return th

Answer 1

A more generic solution than the accepted one, that works with any kind of line ending:

fn main() {
    let mut s = "hello\r\n".to_string();
    let len_withoutcrlf = s.trim_right().len();
    s.truncate(len_withoutcrlf);
    assert_eq!("hello", &s);
}