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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Returns a new array, containing all elements in the given array transformed * using the given transformer, except the ones that were transformed to `null` * or `undefined`. * * @example * ```ts * import { mapNotNullish } from "https://deno.land/std@$STD_VERSION/collections/map_not_nullish.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts"; * * const people = [ * { middleName: null }, * { middleName: "William" }, * { middleName: undefined }, * { middleName: "Martha" }, * ]; * const foundMiddleNames = mapNotNullish(people, (it) => it.middleName); * * assertEquals(foundMiddleNames, ["William", "Martha"]); * ``` */export function mapNotNullish<T, O>( array: readonly T[], transformer: (el: T) => O,): NonNullable<O>[] { const ret: NonNullable<O>[] = [];
for (const element of array) { const transformedElement = transformer(element);
if (transformedElement !== undefined && transformedElement !== null) { ret.push(transformedElement as NonNullable<O>); } }
return ret;}