| 1 | import { AsyncIterableX } from './asynciterablex';
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| 2 | export class BufferAsyncIterable extends AsyncIterableX {
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| 3 | constructor(source, count, skip) {
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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 | this._skip = skip;
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| 8 | }
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| 9 | async *[Symbol.asyncIterator]() {
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| 10 | let buffers = [], i = 0;
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| 11 | for await (let item of this._source) {
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| 12 | if (i % this._skip === 0) {
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| 13 | buffers.push([]);
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| 14 | }
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| 15 | for (let buffer of buffers) {
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| 16 | buffer.push(item);
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| 17 | }
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| 18 | if (buffers.length > 0 && buffers[0].length === this._count) {
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| 19 | yield buffers.shift();
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| 20 | }
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| 21 | i++;
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| 22 | }
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| 23 | while (buffers.length > 0) {
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| 24 | yield buffers.shift();
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| 25 | }
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| 26 | }
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| 27 | }
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| 28 | export function buffer(source, count, skip) {
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| 29 | if (skip == null) {
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| 30 | skip = count;
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| 31 | }
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| 32 | return new BufferAsyncIterable(source, count, skip);
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| 33 | }
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| 34 |
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| 35 |
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