array-product

Returns an array of all combinations of elements from all arrays.

A simple function to duplicate Ruby's Array#product, but without extending the function on Array's prototype.

Support

This makes use of Array.prototype.flatMap which has limited support in both Node and browsers. For Node this means for native flatMap support you need to be above Node 10.x. If you are using this for browsers either polyfill the functionality with your favorite tool or core-js.

Caniuse browser support.

Use

const product = require('array-product');

product([1,2,3], [4,5])     // [[1,4],[1,5],[2,4],[2,5],[3,4],[3,5]]
product([1,2], [1,2])       // [[1,1],[1,2],[2,1],[2,2]]
product([1,2], [3,4],[5,6]) // [[1,3,5],[1,3,6],[1,4,5],[1,4,6],
                            //     [2,3,5],[2,3,6],[2,4,5],[2,4,6]]
product([1,2], nil)         // [[1],[2]]
product([1,2], [])          // []