- chars
- Some
- None
Rust - string characters
examples/strings/characters/src/main.rs
#[allow(clippy::iter_skip_next)] fn main() { let text = String::from("The black cat"); println!("{}", text); println!("{:?}", text.chars()); println!("{:?}", text.chars().nth(4)); //println!("{:?}", text.chars().skip(4).nth(0)); println!("{:?}", text.chars().skip(4).next()); // clippy tells us to use `.nth(4)` println!("{:?}", text.chars().nth(20)); println!("--------"); for n in [-1, 4, 20] { let char = text.chars().nth(n as usize); println!("{:?}", char); match char { Some(value) => println!("{}", value), None => println!("This was None"), } } }
The black cat Chars(['T', 'h', 'e', ' ', 'b', 'l', 'a', 'c', 'k', ' ', 'c', 'a', 't']) Some('b') Some('b') None -------- None This was None Some('b') b None This was None