Function filterAB

filterAB<V>(data: readonly V[], filter: (a: V) => boolean): [a: V[], b: V[]]
Returns two separate arrays of everything that filter returns true, and everything it returns false on. The in-built Array.filter() in constrast only returns things that filter returns true for.
```
const [ matching, nonMatching ] = filterAB(data, v => v.enabled);
// `matching` is a list of items from `data` where .enabled is true
// `nonMatching` is a list of items from `data` where .enabled is false
```
Type Parameters
- V
Parameters
- data: readonly V[]
  Array of data to filter
- filter: (a: V) => boolean
  Function which returns true to add items to the A list, or false for items to add to the B list
Returns [a: V[], b: V[]]
Array of two elements. The first is items that match filter, the second is items that do not.