1/// if >= v1.60.0, a.abs_diff(b) is available. 2/// https://doc.rust-lang.org/std/primitive.u64.html#method.abs_diff 3pub fn abs_diff( 4 a: u64, 5 b: u64, 6) -> u64 { 7 if a >= b { 8 a - b 9 } else { 10 b - a 11 } 12} 13 14#[cfg(test)] 15mod tests { 16 #[test] 17 fn test() {} 18}