# isNaNArray
> Test if a value is an array-like object containing only NaN values.
## Usage
```javascript
var isNaNArray = require( '@stdlib/assert/is-nan-array' );
```
#### isNaNArray( value )
Tests if a `value` is an array-like object containing **only** `NaN` values.
```javascript
var bool = isNaNArray( [ NaN, NaN, NaN ] );
// returns true
bool = isNaNArray( [ NaN, 2 ] );
// returns false
```
#### isNaNArray.primitives( value )
Tests if a `value` is an array-like object containing **only** primitive `NaN` values.
```javascript
var Number = require( '@stdlib/number/ctor' );
var bool = isNaNArray.primitives( [ NaN, NaN, NaN ] );
// returns true
bool = isNaNArray.primitives( [ NaN, new Number( NaN ) ] );
// returns false
```
#### isNaNArray.objects( value )
Tests if a `value` is an array-like object containing **only** object `NaN` values.
```javascript
var Number = require( '@stdlib/number/ctor' );
var bool = isNaNArray.objects( [ new Number( NaN ), new Number( NaN ) ] );
// returns true
bool = isNaNArray.objects( [ NaN, new Number( NaN ) ] );
// returns false
bool = isNaNArray.objects( [ NaN, NaN, NaN ] );
// returns false
```
## Examples
```javascript
var Number = require( '@stdlib/number/ctor' );
var Float64Array = require( '@stdlib/array/float64' );
var isNaNArray = require( '@stdlib/assert/is-nan-array' );
var bool = isNaNArray( [ NaN ] );
// returns true
bool = isNaNArray( [ NaN, NaN, NaN ] );
// returns true
bool = isNaNArray( [ new Number( NaN ), NaN, NaN ] );
// returns true
bool = isNaNArray( new Float64Array( [ NaN, NaN ] ) );
// returns true
bool = isNaNArray( NaN );
// returns false
bool = isNaNArray( [ 'a', 'b', 'c' ] );
// returns false
bool = isNaNArray( [ 'a', NaN ] );
// returns false
```