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

The Interactive Extensions for JavaScript

import { AsyncIterableX } from '../asynciterablex';
import { arrayIndexOfAsync } from '../../util/arrayindexof';
import { comparerAsync } from '../../util/comparer';
export class ExceptAsyncIterable extends AsyncIterableX {
    constructor(first, second, comparer) {
        super();
        this._first = first;
        this._second = second;
        this._comparer = comparer;
    }
    async *[Symbol.asyncIterator]() {
        const map = [];
        for await (const secondItem of this._second) {
            map.push(secondItem);
        }
        for await (const firstItem of this._first) {
            if ((await arrayIndexOfAsync(map, firstItem, this._comparer)) === -1) {
                map.push(firstItem);
                yield firstItem;
            }
        }
    }
}
export function except(second, comparer = comparerAsync) {
    return function exceptOperatorFunction(first) {
        return new ExceptAsyncIterable(first, second, comparer);
    };
}

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