9 lines
234 B
Markdown
9 lines
234 B
Markdown
### Powerset
|
|
|
|
Use `reduce()` combined with `map()` to iterate over elements and combine into an array containing all combinations.
|
|
|
|
```js
|
|
var powerset = arr =>
|
|
arr.reduce( (a,v) => a.concat(a.map( r => [v].concat(r) )), [[]]);
|
|
```
|