import type { array, matrix } from "../types";
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: array): array;
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: array, flag: 0): array;
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: array, flag: 1): matrix;
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: matrix): array;
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: matrix, flag: 0): array;
/**
 * Unique values in an array or matrix.
 *
 * Returns the unique values from an array or matrix. Optionally, returns the unique values along with their original indices.
 *
 * @param x The input array or matrix of values
 * @param flag If `1`, returns both unique values and their indices; if `0`, returns only unique values (default is 0)
 * @returns The unique values, or a matrix containing the unique values and their indices
 * @throws If no input is provided or the flag is invalid
 *
 * @example Unique values from an array
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5]), [-12, -3, 0, 1, 2, 3, 4, 5, 9]);
 *
 * ```
 *
 * @example Unique values and their indices
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([9, -3, 2, -12, 0, 1, 0, 1, 2, 3, 4, 5], 1), [[-12, -3, 0, 1, 2, 3, 4, 5, 9], [3, 1, 4, 5, 2, 9, 10, 11, 0]]);
 *
 * ```
 *
 * @example Unique values from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]]), [3, 4, 5, 6]);
 *
 * ```
 *
 * @example Unique values and indices from a matrix
 * ```ts
 * import { assertEquals } from "jsr:@std/assert";
 *
 * assertEquals(unique([[5, 4], [5, 3], [6, 3]], 1), [[3, 4, 5, 6], [3, 1, 0, 4]]);
 * ```
 */
export default function unique(x: matrix, flag: 1): matrix;
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