Method map

packages/core/src/storages/dataset.ts:514–525

* Produces a new array of values by mapping each value in list through a transformation function `iteratee()`. * Each invocation of `iteratee()` is called with two arguments: `(element, index)`. * * If `iteratee` returns a `Promise` then it's awaited before a next call. * *

(iteratee: DatasetMapper<Data, R>, options: DatasetIteratorOptions = {})

     * @param [options] All `map()` parameters.
     */
    async map<R>(iteratee: DatasetMapper<Data, R>, options: DatasetIteratorOptions = {}): Promise<R[]> {
        checkStorageAccess();

        const result: R[] = [];

        await this.forEach(async (item, index) => {
            const res = await iteratee(item, index);
            result.push(res);
        }, options);

        return result;
    }

    /**
     * Reduces a list of values down to a single value.