| 1 | import { AsyncIterableX } from './asynciterablex';
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| 2 | export class TakeLastAsyncIterable extends AsyncIterableX {
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| 3 | constructor(source, count) {
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| 4 | super();
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| 5 | this._source = source;
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| 6 | this._count = count;
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| 7 | }
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| 8 | async *[Symbol.asyncIterator]() {
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| 9 | if (this._count > 0) {
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| 10 | let q = [];
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| 11 | for await (let item of this._source) {
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| 12 | if (q.length >= this._count) {
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| 13 | q.shift();
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| 14 | }
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| 15 | q.push(item);
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| 16 | }
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| 17 | while (q.length > 0) {
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| 18 | yield q.shift();
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| 19 | }
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| 20 | }
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| 21 | }
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| 22 | }
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| 23 | export function takeLast(source, count) {
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| 24 | return new TakeLastAsyncIterable(source, count);
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| 25 | }
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| 26 |
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| 27 |
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