| 1 | import { wrapWithAbort } from './operators/withabort';
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| 2 | import { throwIfAborted } from '../aborterror';
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| 3 | /**
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| 4 | * Returns the first element of an async-iterable sequence that matches the predicate if provided, or undefined if no such element exists.
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| 5 | *
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| 6 | * @export
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| 7 | * @template T The type of the elements in the source sequence.
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| 8 | * @param {AsyncIterable<T>} source Source async-enumerable sequence.
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| 9 | * @returns {(Promise<S | undefined>)} A Promise containing the first element in the async-iterable sequence,
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| 10 | * or a default value if no such element exists.
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| 11 | */
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| 12 | export async function first(source, options) {
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| 13 | const { ['signal']: signal, ['thisArg']: thisArg, ['predicate']: predicate = async () => true } = options || {};
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| 14 | throwIfAborted(signal);
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| 15 | let i = 0;
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| 16 | for await (const item of wrapWithAbort(source, signal)) {
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| 17 | if (await predicate.call(thisArg, item, i++, signal)) {
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| 18 | return item;
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| 19 | }
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| 20 | }
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| 21 | return undefined;
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| 22 | }
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| 23 |
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| 24 | //# sourceMappingURL=first.mjs.map
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