Function addAll

addAll<E>(array?, elements?): E[] | undefined | null
Returns the array that adds all the given elements
Type Parameters
- E
Parameters
- Optionalarray: null | E[]
  the arrays to inspect
- Optionalelements: null | E[]
  the elements to remove
Returns E[] | undefined | null
the array that adds all the given elements
Example
```
addAll(undefined, ['bar']);    // ['bar']
addAll(['foo', 'bar'], undefined);    // ['foo', 'bar']
addAll(['foo', 'bar'], ['world']);    // ['foo', 'bar', 'world']
```