fn char_info(text: &str) {
    println!("========");
    println!("Info {}", text);
    println!("Utf8 Bytes {:x?}", text.as_bytes());
    println!("len() => {}", text.len());
    println!("chars().count() => {}", text.chars().count());
}

fn main() {
    char_info("a");
    char_info("ä");
    char_info("…");
    char_info("😀");
    char_info("😀");
}