import type { Comparator } from "./ord.js";
export declare function array<R>(count: number, factory: (index: number) => R): R[];
export declare function some<T>(data: T | T[], predicate: (item: T) => boolean): boolean;
export declare function unique<T>(items: Array<T>): Array<T>;
export declare function union<T>(larger: T[], smaller: T[]): T[];
export declare function intersection<T>(a: T[], b: T[]): T[];
export declare function isArrayEmpty<T>(arr: T[]): arr is [];
export declare function createArrayComparator<T>(compare: (a: T, b: T) => number): (a: T[], b: T[]) => number;
export type Deduplicator<T> = (data: T[]) => T[];
export interface DeduplicatorOptions {
    /** @default 12 */
    threshold?: number;
}
export declare function createDeduplicator<T>(compare: Comparator<T>, { threshold }?: DeduplicatorOptions): Deduplicator<T>;
export type Intersector<T> = (a: T[], b: T[]) => T[];
export declare function createIntersector<T>(compare: Comparator<T>): Intersector<T>;