64 lines
1.3 KiB
TypeScript
64 lines
1.3 KiB
TypeScript
/**
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* Copyright 2023 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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export {
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catchError,
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defaultIfEmpty,
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defer,
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delay,
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EMPTY,
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filter,
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first,
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firstValueFrom,
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from,
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fromEvent,
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identity,
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ignoreElements,
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map,
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merge,
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mergeMap,
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NEVER,
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noop,
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Observable,
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of,
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OperatorFunction,
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pipe,
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race,
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raceWith,
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retry,
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startWith,
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switchMap,
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tap,
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throwIfEmpty,
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timer,
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} from 'rxjs';
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import {mergeMap, from, filter, map, type Observable} from 'rxjs';
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export function filterAsync<T>(
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predicate: (value: T) => boolean | PromiseLike<boolean>
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) {
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return mergeMap<T, Observable<T>>(value => {
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return from(Promise.resolve(predicate(value))).pipe(
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filter(isMatch => {
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return isMatch;
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}),
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map(() => {
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return value;
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})
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);
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});
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}
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