@reactivex/ix-esnext-esm/asynciterable/isempty.js

The Interactive Extensions for JavaScript

import { wrapWithAbort } from './operators/withabort';
import { throwIfAborted } from '../aborterror';
/**
 * Determines whether the given async-iterable is empty.
 *
 * @export
 * @template T The type of elements in the source sequence.
 * @param {AsyncIterable<T>} source The source async-iterable to determine whether it is empty.
 * @param {AbortSignal} [signal] An optional abort signal to cancel the operation.
 * @returns {Promise<boolean>} Returns a promise containing true if the sequence is empty, otherwise false.
 */
export async function isEmpty(source, signal) {
    throwIfAborted(signal);
    for await (const _ of wrapWithAbort(source, signal)) {
        return false;
    }
    return true;
}

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