hm.rs

#[derive(Debug)]
struct Skill {
    name: &'static str,
    level: i32,
}

impl Skill {
    fn improve(&mut self) -> &mut Self {
        self.level += 1;
        self
    }
    fn get_name(&self) -> &'static str {
        self.name
    }
}

fn dbg(skills:&Vec<Skill>) -> () {
for skill in skills {
        println!("{:?}", skill);
    };
}

fn main() {
    // Two skills, neither declared as mutable:
    let skill_one = Skill {
        name: "sitting",
        level: 100,
    };
    let skill_two = Skill {
        name: "chillin",
        level: 666,
    };
    // mutable vector of those skills:
    let mut skills = vec![skill_one, skill_two];
    dbg(&skills);
    // mutating away:
    skills[0].level += 1;
    dbg(&skills);
    skills[1].improve();
    dbg(&skills);
    skills[0].improve();
    dbg(&skills);
    println!("  {}", skills[1].get_name());
    println!("   {}", skills[1].level);
    println!("  {}", skills[1].improve().get_name());
    println!("   {}", skills[1].level);
}