-
Notifications
You must be signed in to change notification settings - Fork 619
/
min_with.ts
34 lines (31 loc) · 951 Bytes
/
min_with.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
/**
* Returns the first element having the smallest value according to the provided
* comparator or undefined if there are no elements
*
* @example
* ```ts
* import { minWith } from "https://deno.land/std@$STD_VERSION/collections/min_with.ts";
* import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts";
*
* const people = ["Kim", "Anna", "John"];
* const smallestName = minWith(people, (a, b) => a.length - b.length);
*
* assertEquals(smallestName, "Kim");
* ```
*/
export function minWith<T>(
array: readonly T[],
comparator: (a: T, b: T) => number,
): T | undefined {
let min: T | undefined = undefined;
let isFirst = true;
for (const current of array) {
if (isFirst || comparator(current, <T> min) < 0) {
min = current;
isFirst = false;
}
}
return min;
}