array-combos

A function to get the unique item combinations from an array

• Plain old vanilla JS
• Just 0.6kb gzipped
• Does not use generators

Installation

npm install array-combos

Usage

import combos from 'array-combos'

const arr = [ 1, 2, 3 ]

console.log(combos(arr))

// [
//   [],
//   [ 1 ],
//   [ 2 ],
//   [ 3 ],
//   [ 1, 2 ],
//   [ 1, 3 ],
//   [ 2, 3 ],
//   [ 1, 2, 3 ]
// ]

An optional second argument will restrict results to combinations with that number of items.

import combos from 'array-combos'

const arr = [ 1, 2, 3 ]

console.log(combos(arr, 2))

// [
//   [ 1, 2 ],
//   [ 1, 3 ],
//   [ 2, 3 ],
// ]

Browser support

Array Combos is packaged with Babel, and makes use of Array.from. If you want Array Combos to work on browsers that don't support this method (e.g. IE11), then you will need to polyfill Array.from before using combos.