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ipermutations
Subhajit Sahu edited this page May 3, 2023
·
1 revision
List all possible permutations.
Alternatives: ipermutations, permutations.
Similar: randomPermutation, permutations, hasPermutation.
function ipermutations(x, n)
// x: an array
// n: number of values [-1 ⇒ any]const xarray = require('extra-array');
[...xarray.ipermutations([1, 2])];
// → [ [], [ 1 ], [ 2 ], [ 1, 2 ], [ 2, 1 ] ]
[...xarray.ipermutations([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 ]
// ]
[...xarray.ipermutations([1, 2, 3], 2)];
// → [ [ 1, 2 ], [ 1, 3 ], [ 2, 1 ], [ 2, 3 ], [ 3, 1 ], [ 3, 2 ] ]