59 lines
1.3 KiB
TypeScript
59 lines
1.3 KiB
TypeScript
/**
|
|
* Copyright 2023 Google Inc. All rights reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
export {
|
|
catchError,
|
|
defaultIfEmpty,
|
|
filter,
|
|
first,
|
|
ignoreElements,
|
|
map,
|
|
mergeMap,
|
|
raceWith,
|
|
retry,
|
|
tap,
|
|
throwIfEmpty,
|
|
firstValueFrom,
|
|
defer,
|
|
EMPTY,
|
|
from,
|
|
fromEvent,
|
|
merge,
|
|
race,
|
|
timer,
|
|
OperatorFunction,
|
|
identity,
|
|
noop,
|
|
pipe,
|
|
Observable,
|
|
} from 'rxjs';
|
|
|
|
import {mergeMap, from, filter, map, type Observable} from 'rxjs';
|
|
|
|
export function filterAsync<T>(
|
|
predicate: (value: T) => boolean | PromiseLike<boolean>
|
|
) {
|
|
return mergeMap<T, Observable<T>>(value => {
|
|
return from(Promise.resolve(predicate(value))).pipe(
|
|
filter(isMatch => {
|
|
return isMatch;
|
|
}),
|
|
map(() => {
|
|
return value;
|
|
})
|
|
);
|
|
});
|
|
}
|