import { PlainObject } from "../models.mjs";

//#region src/array/unique.d.ts
/**
 * Get an array of unique items
 *
 * @param array Original array
 * @param callback Callback to get an item's value
 * @returns Array of unique items
 *
 * @example
 * ```typescript
 * unique(
 *   [{id: 1}, {id: 2}, {id: 3}, {id: 2}],
 *   item => item.id,
 * ); // => [{id: 1}, {id: 2}, {id: 3}]
 * ```
 */
declare function unique<Item>(array: Item[], callback: (item: Item, index: number, array: Item[]) => unknown): Item[];
/**
 * Get an array of unique items
 *
 * @param array Original array
 * @param key Key to use for unique value
 * @returns Array of unique items
 *
 * @example
 * ```typescript
 * unique(
 *   [{id: 1}, {id: 2}, {id: 3}, {id: 2}],
 *   'id',
 * ); // => [{id: 1}, {id: 2}, {id: 3}]
 * ```
 */
declare function unique<Item extends PlainObject, ItemKey extends keyof Item>(array: Item[], key: ItemKey): Item[];
/**
 * Get an array of unique items
 *
 * @param array Original array
 * @returns Array of unique items
 *
 * @example
 * ```typescript
 * unique([1, 2, 3, 2]); // => [1, 2, 3]
 * ```
 */
declare function unique<Item>(array: Item[]): Item[];
//#endregion
export { unique };