import { ArrayIterator, ArrayLikeIterator, ObjectIterator, StringIterator, WithNullable } from './types';
export interface ForEach {
    <T>(collection: WithNullable<T[]>, iteratee?: ArrayIterator<T, any>): T[];
    (collection: WithNullable<string>, iteratee?: StringIterator<any>): string;
    <T>(collection: WithNullable<ArrayLike<T>>, iteratee?: ArrayLikeIterator<T, any>): ArrayLike<T>;
    <T extends object>(collection: WithNullable<T>, iteratee?: ObjectIterator<T, any>): T;
}
/**
 * 创建迭代集合方法
 *
 * @private
 * @param dir 迭代方向
 * @returns 迭代集合方法
 */
declare function createForEach(dir: 1 | -1): ForEach;
export default createForEach;