fn main() { let discussions = vec!["design", "safety", "itinerary"]; for discussion in discussions.iter() { println!("pre-initiation discussions: {}", discussion); } let rebuff = |challenge: &str| println!("challenge rebuffed: {}", challenge); rebuff("weather concerns"); let launch_anew = || println!("launching the boat anew with excitement and care, keeping the destination under wraps for now!"); launch_anew(); }