/**
 * Creates a duplicate-free version of an array, using SameValueZero for equality comparisons.
 *
 * @param array - The array to inspect
 * @returns The new duplicate-free array
 *
 * @example
 * ```ts
 * uniq([2, 1, 2]);
 * // => [2, 1]
 * ```
 */
export declare function uniq<T>(array: T[]): T[];
/**
 * Creates a duplicate-free version of an array using deep equality comparisons.
 *
 * @param array - The array to inspect
 * @returns The new duplicate-free array
 *
 * @example
 * ```ts
 * uniqDeep([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }]);
 * // => [{ 'x': 1 }, { 'x': 2 }]
 * ```
 */
export declare function uniqDeep<T>(array: T[]): T[];
/**
 * Creates a duplicate-free version of an array using a custom iteratee function.
 *
 * @param array - The array to inspect
 * @param iteratee - The function invoked per element or property name
 * @returns The new duplicate-free array
 *
 * @example
 * ```ts
 * uniqBy([2.1, 1.2, 2.3], Math.floor);
 * // => [2.1, 1.2]
 *
 * uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
 * // => [{ 'x': 1 }, { 'x': 2 }]
 * ```
 */
export declare function uniqBy<T, K = T>(array: T[], iteratee: ((value: T) => K) | keyof T): T[];