Simple object and array cartesian combination generator (for node, typescript and the browser). Kombi will generate every combination between the sets of value given as parameters.

Installation

JS / Typescript / Node JS

Kombi can be installed using yarn or npm.

npm install kombi
# or
yarn add kombi

And import :

// EMAScript import
import {kombi} from 'kombi';

// Or Common JS:
const {kombi} = require('kombi');

// and used...

const obj = {
  a: [1, 2, 3],
  b: ['a', 'b']
}

const mergedObj = kombi(obj)

console.log(mergedObj)

/*
[
  {a: 1, b: 'a'},
  {a: 1, b: 'b'},
  {a: 2, b: 'a'},
  {a: 2, b: 'b'},
  {a: 3, b: 'a'},
  {a: 3, b: 'b'},
]
*/

Browser

You can use the CDN:

<script src="https://unpkg.com/kombi"></script>

And everything is globally accessible and prefixed with Kombi:

const kombi = new Kombi.kombi(obj)

Usage

Combinate object with array properties

const result = kombi({
    a: [1, 2, 3, 4],
    b: ['a', 'b', 'c', 'd'],
})

/*
result = [
    {a: 1, b: 'a'}, {a: 1, b: 'b'}, {a: 1, b: 'c'}, {a: 1, b: 'd'},
    {a: 2, b: 'a'}, {a: 2, b: 'b'}, {a: 2, b: 'c'}, {a: 2, b: 'd'},
    {a: 3, b: 'a'}, {a: 3, b: 'b'}, {a: 3, b: 'c'}, {a: 3, b: 'd'},
    {a: 4, b: 'a'}, {a: 4, b: 'b'}, {a: 4, b: 'c'}, {a: 4, b: 'd'}
]
*/

Combinate array of arrays

const result = kombi([
    [1, 2, 3, 4],
    ['a', 'b', 'c'],
])

/*
result = [
  [1, 'a'], [1, 'b'], [1, 'c'], 
  [2, 'a'], [2, 'b'], [2, 'c'], 
  [3, 'a'], [3, 'b'], [3, 'c'], 
  [4, 'a'], [4, 'b'], [4, 'c']
]
*/

Roadmap

• Improve documentation
• Add more unit test
• Allow single parameters as input, like :

const result = kombi({
    a: [1, 2, 3, 4],
    b: ['a', 'b', 'c', 'd'],
    c: 'foo'
})

Contribute

Pull requests are welcome ! Feel free to contribute.

Credits

Coded with ❤️ by Corentin Thomasset.

License

This project is under the MIT license.