1 | import { comparer } from '../util/comparer';
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2 | import { wrapWithAbort } from './operators/withabort';
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3 | import { throwIfAborted } from '../aborterror';
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4 | /**
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5 | * Determines whether an async-itreable includes a certain value among its entries, returning true or false as appropriate.
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6 | *
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7 | * @export
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8 | * @template T The type of elements in the source sequence.
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9 | * @param {AsyncIterable<T>} source The source sequence to search for the item.
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10 | * @param {T} valueToFind The value to search for.
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11 | * @param {number} [fromIndex=0] The position in this async-iterable at which to begin searching for valueToFind.
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12 | * @param {AbortSignal} [signal] An optional abort signal to cancel the operation at any time.
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13 | * @returns {Promise<boolean>} Returns a promise containing true if the value valueToFind is found within the async-iterable.
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14 | */
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15 | export async function includes(source, valueToFind, fromIndex = 0, signal) {
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16 | throwIfAborted(signal);
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17 | let fromIdx = fromIndex;
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18 | let i = 0;
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19 | if (Math.abs(fromIdx)) {
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20 | fromIdx = 0;
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21 | }
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22 | for await (const item of wrapWithAbort(source, signal)) {
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23 | if (i++ > fromIdx && comparer(item, valueToFind)) {
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24 | return true;
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25 | }
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26 | }
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27 | return false;
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28 | }
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29 |
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30 | //# sourceMappingURL=includes.mjs.map
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