#![warn(clippy::needless_range_loop)] fn calc_idx(i: usize) -> usize { (i + i + 20) % 4 } fn main() { let ns = vec![2, 3, 5, 7]; for i in 3..10 { println!("{}", ns[i]); } for i in 3..10 { println!("{}", ns[i % 4]); } for i in 3..10 { println!("{}", ns[i % ns.len()]); } for i in 3..10 { println!("{}", ns[calc_idx(i)]); } for i in 3..10 { println!("{}", ns[calc_idx(i) % 4]); } let mut ms = vec![1, 2, 3, 4, 5, 6]; for i in 0..ms.len() { ms[i] *= 2; } assert_eq!(ms, vec![2, 4, 6, 8, 10, 12]); let mut ms = vec![1, 2, 3, 4, 5, 6]; for i in 0..ms.len() { let x = &mut ms[i]; *x *= 2; } assert_eq!(ms, vec![2, 4, 6, 8, 10, 12]); let g = vec![1, 2, 3, 4, 5, 6]; let glen = g.len(); for i in 0..glen { let x: u32 = g[i + 1..].iter().sum(); println!("{}", g[i] + x); } assert_eq!(g, vec![20, 18, 15, 11, 6, 0]); let mut g = vec![1, 2, 3, 4, 5, 6]; let glen = g.len(); for i in 0..glen { g[i] = g[i + 1..].iter().sum(); } assert_eq!(g, vec![20, 18, 15, 11, 6, 0]); let x = 5; let mut vec = vec![0; 9]; for i in x..x + 4 { vec[i] += 1; } let x = 5; let mut vec = vec![0; 10]; for i in x..=x + 4 { vec[i] += 1; } let arr = [1, 2, 3]; for i in 0..3 { println!("{}", arr[i]); } for i in 0..2 { println!("{}", arr[i]); } for i in 1..3 { println!("{}", arr[i]); } } mod issue2277 { pub fn example(list: &[[f64; 3]]) { let mut x: [f64; 3] = [10.; 3]; for i in 0..3 { x[i] = list.iter().map(|item| item[i]).sum::<f64>(); } } }