computational-combinatorics/permutation

import {copy} from './copy.js';
import {reverse} from './reverse.js';

/**
 * Outputs a new permutation that is the reverse of the input permutation.
 *
 * @param {Array} sigma The input permutation.
 * @returns {Array} The reverse of the input permutation.
 */
export function reversed(sigma) {
    const rho = copy(sigma);

    reverse(rho);

    return rho;
}