use std::rc::Rc;

#[derive(Debug)]
struct Thing {
    nums: Vec<f64>
}

fn build_things() -> Vec<Thing> {
    (0..10).map(|_| Thing {nums: vec![1.0, 2.0, 3.0]}).collect()
}


fn build_new_things<'a>(things: Vec<&'a Thing>) -> Vec<&'a Thing> {
    let sliced_things = &things[..];

    let mut new_things: Vec<&Thing> = Vec::new();
    for thing in sliced_things {
        new_things.push(thing);
    }
    new_things
}

fn main() {
    let things = build_things();
    let new_things = build_new_things(things.iter().collect());
    let newer_things = build_new_things(new_things);
    println!("{:?}", newer_things);
}