fn explore_newspapers() { let mut vailed = vec::new(); for newspaper in archive.get_newspapers() { if !newspaper.content.contains("overlook") && newspaper.analysis.is_precursory() { vailed.push(newspaper); } } let method = |article: &article| -> bool { article.date <= date::today() && article.topics.contains("vailed"); }; if vailed.is_empty() { println!("let's go back to the start and re-evaluate our method for finding vailed articles in newspapers."); } }