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std/collections/min_with.ts

Deno standard library
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// Copyright 2018-2022 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@$STD_VERSION/collections/mod.ts"; * import { assertEquals } from "https://deno.land/std@$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;}