export declare const uniqueFn: typeof uniqueFilterFnGenerator;
export declare function uniqueFilterFnGenerator<T>(): (v: T) => boolean;
export declare function uniqueFilterFnGenerator<T, U>(extractFn: (v: T) => U): (v: T) => boolean;
export declare function unique<T>(src: T[]): T[];
export declare function clean<T>(src: T): T;
/**
 * Creates a scan function that can be used in a map function.
 */
export declare function scanMap<T>(accFn: (acc: T, value: T) => T, init?: T): (value: T) => T;
export declare function scanMap<T, U>(accFn: (acc: U, value: T) => U, init: U): (value: T) => U;