# isNullArray
> Test if a value is an array-like object containing only null values.
## Usage
```javascript
var isNullArray = require( '@stdlib/assert/is-null-array' );
```
#### isNullArray( value )
Tests if a `value` is an array-like object containing only `null` values.
```javascript
var bool = isNullArray( [ null, null, null ] );
// returns true
bool = isNullArray( [ null, NaN, null ] );
// returns false
```
## Examples
```javascript
var isNullArray = require( '@stdlib/assert/is-null-array' );
var bool = isNullArray( [ null ] );
// returns true
bool = isNullArray( [ null, null, null ] );
// returns true
bool = isNullArray( null );
// returns false
bool = isNullArray( 'beep' );
// returns false
bool = isNullArray( [ null, 'boop' ] );
// returns false
bool = isNullArray( [] );
// returns false
```