import { Operator } from '../core/types';
/**
 * @short
 * *Join* yielded values using a joiner.
 *
 * @categories
 * operator
 *
 * @description
 * Between each yielded value of the iterable this operator is applied on, an
 * additional value will be yielded.
 *
 * @since
 * 0.0.1
 *
 * @parameter
 * joiner
 * U
 * The additional value between every to yielded values.
 *
 * @returns
 * Operator<T, T | U>
 *
 * @example
 * j.pipe(
 *   [1, 2, 3],
 *   j.join(0),
 * )
 * // => [1, 0, 2, 0, 3]
 */
export declare function join<T, U>(joiner: U): Operator<T, T | U>;