rust-ownership-example-intro.rs

use std::collections::HashMap;

#[derive(Debug)]
struct Service {
    name: String,
    namespace: String,
    endpoints: Vec<String>,
    mappings: HashMap<String, String>,
}

fn main() {
    let svc = Service {
        name: "nginx".to_string(),
        namespace: "default".to_string(),
        endpoints: vec!["192.168.0.1".to_string(), "192.168.0.2".to_string()],
        mappings: HashMap::from([
            ("pod-0".to_string(), "192.168.0.1".to_string()),
            ("pod-1".to_string(), "192.168.0.2".to_string()),
        ]),
    };

    let mut nginx = svc;
    nginx.namespace = "ingress".to_string();
    nginx.endpoints.push("192.168.0.3".to_string());
    nginx
        .mappings
        .insert("pod-2".to_string(), "192.168.0.3".to_string());

    println!("{:?}\n{:?}", svc, nginx);
}