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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * @deprecated Use `Array.prototype.findLastIndex`. This function will be removed in std@0.117.0. * * Returns the index of the last element in the given array matching the given predicate * * Example: * * ```ts * import { findLastIndex } from "https://deno.land/std@$STD_VERSION/collections/mod.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts"; * * const numbers = [ 4, 2, 7 ] * const lastIndexNumber = findLastIndex(numbers, it => it % 2 === 0) * * assertEquals(lastIndexNumber, 1) * ``` */export function findLastIndex<T>( array: readonly T[], predicate: (el: T) => boolean,): number | undefined { for (let i = array.length - 1; i >= 0; i -= 1) { const element = array[i];
if (predicate(element)) { return i; } }
return undefined;}