deno.land / std@0.224.0 / collections / sample.ts
123456789101112131415161718192021222324// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import { randomInteger } from "./_utils.ts";
/** * Returns a random element from the given array. * * @example * ```ts * import { sample } from "https://deno.land/std@$STD_VERSION/collections/sample.ts"; * import { assert } from "https://deno.land/std@$STD_VERSION/assert/assert.ts"; * * const numbers = [1, 2, 3, 4]; * const random = sample(numbers); * * assert(numbers.includes(random as number)); * ``` */export function sample<T>(array: readonly T[]): T | undefined { const length = array.length; return length ? array[randomInteger(0, length - 1)] : undefined;}
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