@polkadot/util/array/filter.js

A collection of useful utilities for @polkadot

// Copyright 2017-2022 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0
import { isNull } from "../is/null.js";
import { isUndefined } from "../is/undefined.js";
/**
 * @name arrayFilter
 * @summary Filters undefined and (optionally) null values from an array
 * @description
 * Returns a new array with all `undefined` values removed. Optionally, when `allowNulls = false`, it removes the `null` values as well
 * @example
 * <BR>
 *
 * ```javascript
 * import { arrayFilter } from '@polkadot/util';
 *
 * arrayFilter([0, void 0, true, null, false, '']); // [0, true, null, false, '']
 * arrayFilter([0, void 0, true, null, false, ''], false); // [0, true, false, '']
 * ```
 */
// eslint-disable-next-line @typescript-eslint/no-explicit-any

export function arrayFilter(array, allowNulls = true) {
  return array.filter(v => !isUndefined(v) && (allowNulls || !isNull(v)));
}