Rust list (VEC) replication

Rust in Vec List the type Realized clone(), You can directly call and copy a new list .

#[test]
fn test_list_clone() {
    
    //  Construct a list ：[5,4,3,2,1]
    let list = (1..=5).rev().collect::<Vec<_>>();

    // Method 1 ： adopt clone() Copy list 
    let mut list_sorted = list.clone();
    list_sorted.sort_unstable();

    // Method 2 ： New list , Then add / Set the element 
    let mut list_new = vec![0; list.len()];
    list.iter().enumerate().for_each(|(i,e)| {
    
        list_new[i] = *e;
    });
    list_new[2] = 300;
    //  Copy the 2 A new one , Can be modified separately , They don't influence each other 
    println!("{:?}", list);//[5, 4, 3, 2, 1]
    println!("{:?}", list_sorted);//[1, 2, 3, 4, 5]
    println!("{:?}", list_new);//[5, 4, 300, 2, 1]
}