rustlings-exercises-completed/exercises/clippy/clippy3.rs

// clippy3.rs
// Here's a couple more easy Clippy fixes, so you can see its utility.

use std::mem;

#[allow(unused_variables, unused_assignments)]
fn main() {
    let my_option: Option<()> = None;
    if let Some(..) = my_option {
        my_option.unwrap();
    }

    let my_arr = &[
        -1, -2, -3,
        -4, -5, -6
    ];
    println!("My array! Here it is: {:?}", my_arr);

    let my_empty_vec: Vec<i32> = Vec::new();
    println!("This Vec is empty, see? {:?}", my_empty_vec);

    let mut value_a = 45;
    let mut value_b = 66;
    // Let's swap these two!
    mem::swap(&mut value_a, &mut value_b);
    println!("value a: {}; value b: {}", value_a, value_b);
}