To find all the combinations of an array
install the package by using below command
npm install array-sets
You can use it like
const combinations = require(‘array-sets’);
let array_sets = combinations([1,2,3]);
combinations function will return all the possible combinations of input array in an array
[
1, 2, 3,
[ 1, 1 ], [ 1, 2 ], [ 1, 3 ],
[ 2, 1 ], [ 2, 2 ], [ 2, 3 ],
[ 3, 1 ], [ 3, 2 ], [ 3, 3 ],
[ 1, 1, 1 ], [ 1, 1, 2 ], [ 1, 1, 3 ],
[ 1, 2, 1 ], [ 1, 2, 2 ], [ 1, 2, 3 ],
[ 1, 3, 1 ], [ 1, 3, 2 ], [ 1, 3, 3 ],
[ 2, 1, 1 ], [ 2, 1, 2 ], [ 2, 1, 3 ],
[ 2, 2, 1 ], [ 2, 2, 2 ], [ 2, 2, 3 ],
[ 2, 3, 1 ], [ 2, 3, 2 ], [ 2, 3, 3 ],
[ 3, 1, 1 ], [ 3, 1, 2 ], [ 3, 1, 3 ],
[ 3, 2, 1 ], [ 3, 2, 2 ], [ 3, 2, 3 ],
[ 3, 3, 1 ], [ 3, 3, 2 ], [ 3, 3, 3 ]
]