Iterating through a list containing structs known at compile-time - oop

Question

I'm unable to run the following code because I'm trying to index the struct instead of using a hard-coded name. Other languages do this, but Rust doesn't seem to given its nature of not being object oriented. The official book doesn't even have a good way of doing the following:
struct Address {
number: u32,
city: String,
}
fn print_an_address() {
let Address[0] = {
number: 1,
city: "New York",
}
println!("{}", address[0]);
}

Answer 1

Rust does have this, you're just not using the right syntax. For example:
#[derive(Debug)]
struct Address {
number: u32,
city: String,
}
fn print_an_address() {
let address = [
Address {
number: 1,
city: "New York".to_string(),
}
];
println!("{:?}", address[0]);
}
The local variable address has the array type [Address; 1] here.
(Playground)
You can easily add more elements. Here we add a second element and iterate over the array instead of fetching a specific index. The type of address here has changed to [Address; 2].
#[derive(Debug)]
struct Address {
number: u32,
city: String,
}
fn print_addresses() {
let address = [
Address {
number: 1,
city: "New York".to_string(),
},
Address {
number: 2,
city: "Boston".to_string(),
},
];
for i in address {
println!("{:?}", i);
}
}
(Playground)