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min_by_key

 3 years ago
source link: https://doc.rust-lang.org/stable/std/cmp/fn.min_by_key.html
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Function std::cmp::min_by_key1.53.0[−][src]

#[must_use]
pub fn min_by_key<T, F, K>(v1: T, v2: T, f: F) -> T where
    F: FnMut(&T) -> K,
    K: Ord, 

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

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

Examples

use std::cmp;

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