Function core::cmp::max_by_key1.53.0[−][src]

pub fn max_by_key<T, F: FnMut(&T) -> K, K: Ord>(v1: T, v2: T, f: F) -> T
This is supported on non-crate feature miri-test-libstd or test or doctest only.
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.

Examples

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);
Run