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