| 1 | import { AsyncIterableX } from '../asynciterable';
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| 2 | import { bindCallback } from '../util/bindcallback';
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| 3 | class FilterIterable extends AsyncIterableX {
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| 4 | constructor(source, predicate) {
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| 5 | super();
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| 6 | this._source = source;
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| 7 | this._predicate = predicate;
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| 8 | }
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| 9 | async *[Symbol.asyncIterator]() {
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| 10 | let i = 0;
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| 11 | for await (const item of this._source) {
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| 12 | if (await this._predicate(item, i++)) {
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| 13 | yield item;
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| 14 | }
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| 15 | }
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| 16 | }
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| 17 | }
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| 18 | export function filterAsync(source, predicate, thisArg) {
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| 19 | return new FilterIterable(source, bindCallback(predicate, thisArg, 2));
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| 20 | }
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| 21 |
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| 22 |
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