Function tracing::stdlib::cmp::max_by_key

1.53.0 (const: unstable) · source ·
pub fn max_by_key<T, F, K>(v1: T, v2: T, f: F) -> Twhere
    F: FnMut(&T) -> K,
    K: Ord,
Expand description

Returns the element that gives the maximum value from the specified function.

Returns the second argument if the comparison determines them to be equal.


use std::cmp;

assert_eq!(cmp::max_by_key(-2, 1, |x: &i32| x.abs()), -2);
assert_eq!(cmp::max_by_key(-2, 2, |x: &i32| x.abs()), 2);