permutations

Lists all possible permutations. [:running:] [:vhs:] [:package:] [:moon:]

array.permutations(x, [n]);
// x: an array
// n: number of values (-1 => any)
// --> ...permutations

const array = require('extra-array');

[...array.permutations([1, 2])];
// [ [ 1, 2 ], [ 2, 1 ] ]

[...array.permutations([1, 2, 3])];
// [
//   [ 1, 2, 3 ],
//   [ 2, 1, 3 ],
//   [ 1, 3, 2 ],
//   [ 3, 1, 2 ],
//   [ 2, 3, 1 ],
//   [ 3, 2, 1 ]
// ]

references

• Data.List.permutations(): Haskell [:running:]: https://npm.runkit.com/@extra-array/permutations [:package:]: https://www.npmjs.com/package/@extra-array/permutations [:moon:]: https://www.npmjs.com/package/@extra-array/permutations.min [:vhs:]: https://asciinema.org/a/319403