# flag
> Return a specified flag for a provided [ndarray][@stdlib/ndarray/ctor].
## Usage
```javascript
var flag = require( '@stdlib/ndarray/flag' );
```
#### flag( x, name )
Returns a specified flag for a provided [ndarray][@stdlib/ndarray/ctor].
```javascript
var zeros = require( '@stdlib/ndarray/zeros' );
var x = zeros( [ 3, 2, 3 ] );
// returns
var o = flag( x, 'READONLY' );
// returns
```
## Notes
- This function is intended as a slight performance optimization over [`@stdlib/ndarray/flags`][@stdlib/ndarray/flags] when **only** a single flag is needed. For retrieving multiple flags, use [`@stdlib/ndarray/flags`][@stdlib/ndarray/flags] directly.
## Examples
```javascript
var zeros = require( '@stdlib/ndarray/zeros' );
var slice = require( '@stdlib/ndarray/slice' );
var E = require( '@stdlib/slice/multi' );
var S = require( '@stdlib/slice/ctor' );
var flag = require( '@stdlib/ndarray/flag' );
// Create an array:
var x = zeros( [ 10, 10, 10, 10 ] );
// returns
// Define some slices:
var slices = [
// :,:,:,:
E( null, null, null, null ),
// 5:10,4,2:4,::-1
E( S( 5, 10 ), 4, S( 2, 4 ), S( null, null, -1 ) ),
// :,:,2,:
E( null, null, 2, null ),
// 1,2,3,:
E( 1, 2, 3, null ),
// 1,3,::2,4::2
E( 1, 3, S( null, null, 2 ), S( 4, null, 2 ) )
];
// Check whether each slice is row-major contiguous...
var s;
var i;
for ( i = 0; i < slices.length; i++ ) {
s = slice( x, slices[ i ] );
console.log( '%s', flag( s, 'ROW_MAJOR_CONTIGUOUS' ) );
}
```
[@stdlib/ndarray/ctor]: https://github.com/stdlib-js/ndarray/tree/main/ctor
[@stdlib/ndarray/flags]: https://github.com/stdlib-js/ndarray/tree/main/flags
[@stdlib/ndarray/array]: https://github.com/stdlib-js/ndarray/tree/main/array