min_by_key in std::cmp - Rust
Description: Returns the element that gives the minimum value from the specified function.
Keywords: rust, rustlang, rust-lang, min_by_key

# Function std::cmp::min_by_key
1.53.0[−][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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