element-web/src/utils/iterables.ts

/*
 * Copyright 2020 The Matrix.org Foundation C.I.C.
 *
 * 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.
 */

import { arrayDiff, arrayUnion, arrayIntersection } from "./arrays";

export function iterableUnion<T>(a: Iterable<T>, b: Iterable<T>): Iterable<T> {
    return arrayUnion(Array.from(a), Array.from(b));
}

export function iterableIntersection<T>(a: Iterable<T>, b: Iterable<T>): Iterable<T> {
    return arrayIntersection(Array.from(a), Array.from(b));
}

export function iterableDiff<T>(a: Iterable<T>, b: Iterable<T>): { added: Iterable<T>, removed: Iterable<T> } {
    return arrayDiff(Array.from(a), Array.from(b));
}