@extra-array/permutations

Lists all possible permutations.

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Lists all possible permutations. :package: :smileycat: :running: :vhs: :moon: :scroll: :newspaper: :bluebook:
Similar: permutation, permutations, hasPermutation.

This is part of package extra-array.



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

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

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

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

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



References