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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;}