Keymbinatorial

Generates a unique combinations of key values by taking a single value from each keys array

Usage

npm install keymbinatorial

var keymbinatorial = require('keymbinatorial');

let objectToCombine = {
    a: ['a', 'b', 'c'],
    c: [1, 2],
    e: [{ a: '1'}, {b: '2'}]
};

// combinations will be an array of unique combinations based on each key and the values in the array
let combinations = keymbinatorial(objectToCombine);

console.log(combinations);
/*
will output:
[
  { a: 'a', c: 1, e: { a: '1' } },
  { a: 'a', c: 1, e: { b: '2' } },
  { a: 'a', c: 2, e: { a: '1' } },
  { a: 'a', c: 2, e: { b: '2' } },
  { a: 'b', c: 1, e: { a: '1' } },
  { a: 'b', c: 1, e: { b: '2' } },
  { a: 'b', c: 2, e: { a: '1' } },
  { a: 'b', c: 2, e: { b: '2' } },
  { a: 'c', c: 1, e: { a: '1' } },
  { a: 'c', c: 1, e: { b: '2' } },
  { a: 'c', c: 2, e: { a: '1' } },
  { a: 'c', c: 2, e: { b: '2' } }
]
*/

The keymbinatorial function takes in an Nx1 object, where N is a set of keys that map to an array.

For each key in the object, the function builds up a list of objects containing a unique combination of keys to values in the array.

Testing

npm test

License

Code licensed under the BSD 3-Clause license. See LICENSE file for terms.