@reactivex/ix-esnext-esm/asynciterable/operators/filter.js

The Interactive Extensions for JavaScript

import { AsyncIterableX } from '../asynciterablex';
export class FilterAsyncIterable extends AsyncIterableX {
    constructor(source, predicate, thisArg) {
        super();
        this._source = source;
        this._predicate = predicate;
        this._thisArg = thisArg;
    }
    async *[Symbol.asyncIterator]() {
        let i = 0;
        for await (const item of this._source) {
            if (await this._predicate.call(this._thisArg, item, i++)) {
                yield item;
            }
        }
    }
}
export function filter(predicate, thisArg) {
    return function filterOperatorFunction(source) {
        return new FilterAsyncIterable(source, predicate, thisArg);
    };
}

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