Rust: accessing elements in vectors

destructure_array.rs

use std::convert::TryFrom;

fn main() {
    let names = vec!["Daniel", "Max", "Lewis"];

    let [daniel, max, lewis] = <[&str; 3]>::try_from(names).ok().unwrap();

    dbg!(daniel, max, lewis);
    // daniel = "Daniel"
    // max = "Max"
    // lewis = "Lewis"
}

indexing.rs

fn main() {
    let names = vec!["Daniel", "Max", "Lewis"];

    let daniel = names[0];
    let max = names[1];
    let lewis = names[2];

    dbg!(daniel, max, lewis);
    // daniel = "Daniel"
    // max = "Max"
    // lewis = "Lewis"
}

slice_pattern.rs

fn main() {
    let names = vec!["Daniel", "Max", "Lewis"];

    let [daniel, max, lewis] = match names.as_slice() {
        [] => panic!("the vector has length 3"),
        [first, second, third] => [first, second, third],
        [..] => panic!("the vector has length 3"),
    };

    dbg!(daniel, max, lewis);
    // daniel = "Daniel"
    // max = "Max"
    // lewis = "Lewis"
}

slice_pattern_two_dot.rs

fn main() {
    let names = vec!["Daniel", "Max", "Lewis"];

    match names.as_slice() {
        [] => println!("empty"),
        [first, rest @ ..] => println!("first name: {:?}, rest of names: {:?}", first, rest),
    }
    // first name: "Daniel", rest of names: ["Max", "Lewis"]
}