我可能会做这样的事情：
fn main() -> Result<(), Box<std::error::Error>> { let samples = vec![ 0.28, 0.3102, 0.9856, 0.3679, 0.3697, 0.46, 0.4311, 0.9781, 0.9891, 0.5052, 0.9173, 0.932, 0.8365, 0.5822, 0.9981, 0.9977, ]; // Use enumerate to get the index let mut iter = samples.iter().enumerate(); // we get the first entry let init = iter.next().ok_or("Need at least one input")?; // we process the rest let result = iter.try_fold(init, |acc, x| { // return None if x is NaN let cmp = x.1.partial_cmp(acc.1)?; // if x is greater the acc let max = if let std::cmp::Ordering::Greater = cmp { x } else { acc }; Some(max) }); println!("{:?}", result); Ok(())}这可以通过在Iterator上添加带有trait的特征来实现
try_max_by。
