import type { Falsy } from "./types";
export declare function forIn(obj: Falsy | {}, cb: (key: string, value: unknown) => void): void;
export declare function forOf(list: Falsy | Iterable<unknown>, cb: (item: unknown, index: number) => void): void;
export declare function forTo(to: number, from: number | Falsy, step: number | Falsy, cb: (index: number) => void): void;
export declare function forUntil(until: number, from: number | Falsy, step: number | Falsy, cb: (index: number) => void): void;