d2_iterators 0.1.0

fn main() {
    print_a(&vec!["hello".to_string(), "world".to_string()]);
    print_b(&["hello", "world"]);
    print_c(vec!["hello".to_string(), "world".to_string()].into_iter());

    print_any(vec!["hello", "world"]);
    print_any(&vec!["hello".to_string(), "mars".to_string()]);
    print_any(&["hello".to_string(), "venus".to_string()]);
    print_any((&["hello", "pluto"]).into_iter());
}

fn print_a(v: &Vec<String>) {
    println!("a");
    for (i, val) in v.into_iter().enumerate() {
        println!("  {} == {}", i, val);
    }
}

fn print_b(v: &[&str]) {
    println!("b");
    for (i, val) in v.into_iter().enumerate() {
        println!("  {} == {}", i, val);
    }
}

fn print_c<I: Iterator<Item = String>>(v: I) {
    println!("c");
    for (i, val) in v.into_iter().enumerate() {
        println!("  {} == {}", i, val);
    }
}

fn print_any<S: AsRef<str>, I: IntoIterator<Item = S>>(v: I) {
    println!("any");
    for (i, val) in v.into_iter().enumerate() {
        println!("  {} == {}", i, val.as_ref());
    }
}