@beenotung/tslib/permutation.js

utils library in Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.n_permutation = n_permutation;
/** @description permutation: order matters */
function n_permutation(n, xs) {
    if (n == 0)
        return [];
    if (n == 1)
        return xs.map(x => [x]);
    return xs.flatMap(x => n_permutation(n - 1, xs).map(xs => [x, ...xs]));
}