| 1 | import { AsyncIterableX } from '../asynciterable';
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| 2 | import { bindCallback } from '../util/bindcallback';
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| 3 | class FlatMapAsyncIterable extends AsyncIterableX {
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| 4 | constructor(source, selector) {
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| 5 | super();
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| 6 | this._source = source;
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| 7 | this._selector = selector;
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| 8 | }
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| 9 | async *[Symbol.asyncIterator]() {
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| 10 | for await (const outer of this._source) {
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| 11 | for await (const inner of this._selector(outer)) {
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| 12 | yield inner;
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| 13 | }
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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 | * Projects each element of a sequence to a potentially async iterable and flattens the
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| 19 | * resulting sequences into one sequence.
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| 20 | * @param {Iterable<T | Promise<T>> | AsyncIterable<T>} source Source sequence
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| 21 | * @param {function:(value: T): Iterable<R | Promise<R>> | AsyncIterable<R>} selector A transform function to apply to each element.
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| 22 | * @param {Object} [thisArg] An optional "this" binding for the selector function.
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| 23 | * @returns {AsyncIterable<R>} An async iterable whose elements are the result of invoking the one-to-many
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| 24 | * transform function on each element of the input sequence.
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| 25 | */
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| 26 | export function flatMapAsync(source, selector, thisArg) {
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| 27 | return new FlatMapAsyncIterable(source, bindCallback(selector, thisArg, 1));
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| 28 | }
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| 29 |
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| 30 | //# sourceMappingURL=flatmapasync.mjs.map
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