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

The Interactive Extensions for JavaScript

import { wrapWithAbort } from './operators/withabort';
import { throwIfAborted } from '../aborterror';
/**
 * Determines whether any element of an async-iterable sequence satisfies a condition.
 *
 * @export
 * @template T The type of the elements in the source sequence.
 * @param {AsyncIterable<T>} source An async-iterable sequence whose elements to apply the predicate to.
 * @param {FindOptions<T, S>} options The options which includes a required predicate, an optional
 * thisArg for binding, and an abort signal for cancellation.
 * @returns {Promise<boolean>} A promise with a boolean determining whether any elements in the source sequence
 * pass the test in the specified predicate.
 */
export async function some(source, options) {
    const { ['signal']: signal, ['thisArg']: thisArg, ['predicate']: predicate } = options;
    throwIfAborted(signal);
    let i = 0;
    for await (const item of wrapWithAbort(source, signal)) {
        if (await predicate.call(thisArg, item, i++, signal)) {
            return true;
        }
    }
    return false;
}

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