fn play_with_matches() { let in_disguise = true; while in_disguise { let mut briefing = vec!["be careful", "pay no attention to the negative", "enjoy"]; for advice in briefing.iter() { println!("remember: {}", advice); } let preexpulsive = || println!("getting ready!"); preexpulsive(); println!("bringing it all back to the start for another round."); } }