import { Seq } from '../Seq';
/**
 * Returns the result of applying the aggregate function to the elements of the current sequence.
 * The difference with [scan()](/api/operators/#scan) is that it only returns the final result.
 *
 * ```typescript
 * const output = from([1, 2, 3, 4, 5]).value(
 *   reduce(100, (acc, i) => acc + i)
 * );
 *
 * //result: 115
 * ```
 *
 * @param seed This is the initial value for aggregation.
 * @param func Aggregate function.
 * @typeParam T Source element type.
 * @typeParam TAccumulate The type returned by the aggregate function.
 * @returns Aggregate results.
 * @category Values
 */
export declare const reduce: <T, TAccumulate>(seed: TAccumulate, func: (acc: TAccumulate, current: T, index: number) => TAccumulate) => (seq: Seq<T>) => TAccumulate;