18.11.1 • Published 2 years ago
lodash.combinations v18.11.1
lodash.combinations
_.combinations(collection, k)
Calculates all possible combinations without repetition of a certain size.
| argument | description |
|---|---|
collection | A collection of distinct values to calculate the groups from. |
k | A number as the size of each group. |
Returns the calculated groups as an array of arrays.
setup
npm i lodash.combinationsimport 'lodash.combinations';
import _ from 'lodash';CDN
<script src="https://unpkg.com/lodash"></script>
<script src="https://unpkg.com/lodash.combinations"></script>usage
let combinations = _.combinations([true, {a: 1}, null], 2);
// => [[true, {a: 1}], [true, null], [{a: 1}, null]]Calculate all possible combinations of all possible sizes.
let combinations = _.flatMap([2, 4, 6], (v, i, a) => _.combinations(a, i + 1));
// => [[2], [4], [6], [2, 4], [2, 6], [4, 6], [2, 4, 6]]