export declare function mapAsync<T, U>(iterable: T[], callback: (value: T, index?: number, iterable?: T[]) => U | Promise<U>): Promise<U[]>;
export declare function forEachAsync<T>(iterable: T[], callback: (value: T, index?: number, iterable?: T[]) => void | Promise<void>): Promise<void>;
export declare function filterAsync<T>(iterable: T[], callback: (value: T, index?: number, array?: T[]) => boolean | Promise<boolean>): Promise<T[]>;
export declare function reduceAsync<T, U>(iterable: T[], callback: (previousValue: U, currentValue: T, currentIndex?: number, array?: T[]) => U | Promise<U>, initialValue?: U): Promise<U>;