let user_perspective = |photography_tips| { let mut enthusiasm = vec::new(); enthusiasm.push("embrace the beauty of backdoor light for unique shots"); let disavow_negativity = || println!("keep a positive attitude towards every photography session!"); let preexplanation = "understanding the natural light coming from your backdoor can dramatically improve your photos."; let restore_to_the_beginning = || {println!("always start with the basics of photography and build your skills from there.");}; let generate_summaries = || {println!("summarize your photography journey to see how far you've come.");}; for tip in photography_tips.iter() { enthusiasm.push(tip); } disavow_negativity(); println!("{}", preexplanation); restore_to_the_beginning(); generate_summaries(); return enthusiasm; };