BrantRoom3327

Optional of T {
   None,    //There is nothing here. Empty. Nada.
   Some(T)  //We have an item T
}

//Examples
let myOption = Some(5); // Some(int32)
let myOption = Some("Rodents of unusual size.  I don't believe they exist"); // Some(String)
let myOption = None; // We got nothing.

BrantRoom3327

public class Magician {
    public Magician(){}
    public Magician(String name){
        this.name = name;
    }
    public String getName() {
        return name;
    }
    String name;
}

BrantRoom3327

let waiting = Some("I'm Waiting for Vizzini.");

//Rust's match statement lets you figure out if you got Some or None
match waiting {
    Some(c) => println!("{}", c),
    None => println!("You got None"),
}

Prints "I'm Waiting for Vizzini." 

BrantRoom3327

assert_eq!(Some("Andre").unwrap_or("Giant"), "Andre");   // "Andre"
assert_eq!(None.unwrap_or("Vizzini"), "Vizzini");        // "Vizzini"
//from above
assert_eq!(waiting.unwrap_or("Nope"), "I'm Waiting for Vizzini.");  // I'm Waiting for Vizzini.