# Function core::cmp::max_by

1.53.0 (const: unstable) · source · [−]

    pub fn max_by<T, F>(v1: T, v2: T, compare: F) -> Twhere
        F: FnOnce(&T, &T) -> Ordering,

Expand description

Returns the maximum of two values with respect to the specified comparison function.

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

## Examples

    use std::cmp;

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

Run