npm package: @stdlib/ndarray-base-nullary
Description: Apply a nullary function and assign results to elements in an output ndarray.
Author: The Stdlib Authors
Latest version: 0.3.2

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<details>
  <summary>
    About stdlib...
  </summary>
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</details>

# Nullary

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Apply a nullary callback and assign results to elements in an output ndarray.

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/ndarray-base-nullary
```

</section>

<section class="usage">

## Usage

```javascript
var nullary = require( '@stdlib/ndarray-base-nullary' );
```

#### nullary( arrays, fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

<!-- eslint-disable max-len -->

```javascript
var Float64Array = require( '@stdlib/array-float64' );

function fcn() {
    return 10.0;
}

// Create data buffers:
var xbuf = new Float64Array( 12 );

// Define the shape of the output array:
var shape = [ 3, 1, 2 ];

// Define the array strides:
var sx = [ 4, 4, 1 ];

// Define the index offset:
var ox = 1;

// Create the output ndarray-like object:
var x = {
    'dtype': 'float64',
    'data': xbuf,
    'shape': shape,
    'strides': sx,
    'offset': ox,
    'order': 'row-major'
};

// Apply the nullary function:
nullary( [ x ], fcn );

console.log( x.data );
// => <Float64Array>[ 0.0, 10.0, 10.0, 0.0, 0.0, 10.0, 10.0, 0.0, 0.0, 10.0, 10.0, 0.0 ]
```

The function accepts the following arguments:

-   **arrays**: array-like object containing an output ndarray.
-   **fcn**: nullary function to apply.

The provided ndarray should be an object with the following properties:

-   **dtype**: data type.
-   **data**: data buffer.
-   **shape**: dimensions.
-   **strides**: stride lengths.
-   **offset**: index offset.
-   **order**: specifies whether an ndarray is row-major (C-style) or column major (Fortran-style).

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   For very high-dimensional ndarrays which are non-contiguous, one should consider copying the underlying data to contiguous memory before applying a nullary function in order to achieve better performance.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random-base-discrete-uniform' ).factory;
var filledarray = require( '@stdlib/array-filled' );
var ndarray2array = require( '@stdlib/ndarray-base-to-array' );
var nullary = require( '@stdlib/ndarray-base-nullary' );

var x = {
    'dtype': 'generic',
    'data': filledarray( 0, 10, 'generic' ),
    'shape': [ 5, 2 ],
    'strides': [ 2, 1 ],
    'offset': 0,
    'order': 'row-major'
};

nullary( [ x ], discreteUniform( -100, 100 ) );
console.log( ndarray2array( x.data, x.shape, x.strides, x.offset, x.order ) );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

Character codes for data types:

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- charcodes -->

-   **x**: `bool` (boolean).
-   **z**: `complex128` (double-precision floating-point complex number).
-   **c**: `complex64` (single-precision floating-point complex number).
-   **f**: `float32` (single-precision floating-point number).
-   **d**: `float64` (double-precision floating-point number).
-   **k**: `int16` (signed 16-bit integer).
-   **i**: `int32` (signed 32-bit integer).
-   **s**: `int8` (signed 8-bit integer).
-   **t**: `uint16` (unsigned 16-bit integer).
-   **u**: `uint32` (unsigned 32-bit integer).
-   **b**: `uint8` (unsigned 8-bit integer).

<!-- ./charcodes -->

Function name suffix naming convention:

```text
stdlib_ndarray_<output_data_type>[_as_<callback_return_data_type>]
```

For example,

<!-- run-disable -->

```c
void stdlib_ndarray_d(...) {...}
```

is a function which accepts one double-precision floating-point output ndarray. In other words, the suffix encodes the function type signature.

To support callbacks whose return values are of a different data type than the output ndarray data types, the naming convention supports appending an `as` suffix. For example,

<!-- run-disable -->

```c
void stdlib_ndarray_f_as_d(...) {...}
```

is a function which accepts one single-precision floating-point output ndarray. However, the callback returns double-precision floating-point numbers. Accordingly, the output values need to be cast using the following conversion sequence

```c
// Evaluate the callback:
double out = f();

// Convert the callback return value to single-precision:
x[ i ] = (float)out;
```

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/ndarray/base/nullary.h"
```

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- loops -->

#### stdlib_ndarray_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_UINT8;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 2, 1 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_b( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static stdlib_complex64_t fcn( void ) {
    // ...
}

// Apply the callback:
int8_t status = stdlib_ndarray_c( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_b( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_f( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static float fcn( void ) {
    return 10.0f;
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_f( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_f( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_k( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_k( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_k( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_s( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_s( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_s( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_t( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_t( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_t( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_c_as_z( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_COMPLEX64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static stdlib_complex128_t fcn( void ) {
    // ...
}

// Apply the callback:
int8_t status = stdlib_ndarray_c_as_z( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_c_as_z( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static double fcn( void ) {
    return 10.0;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `double (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_b( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_f( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static float fcn( void ) {
    return 10.0f;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_f( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_f( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_i( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int32_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_i( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int32_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_i( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_k( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_k( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_k( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_s( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_s( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_s( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_t( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_t( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_t( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_d_as_u( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT64;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 16, 8 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint32_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_d_as_u( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint32_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_d_as_u( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static float fcn( void ) {
    return 10.0f;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f_as_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f_as_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f_as_b( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f_as_d( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static double fcn( void ) {
    return 10.0;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f_as_d( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `double (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f_as_d( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f_as_k( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f_as_k( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f_as_k( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f_as_s( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f_as_s( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f_as_s( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_f_as_t( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_FLOAT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_f_as_t( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_f_as_t( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_i( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int32_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_i( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int32_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_i( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_i_as_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_i_as_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_i_as_b( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_i_as_k( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_i_as_k( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_i_as_k( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_i_as_s( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_i_as_s( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_i_as_s( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_i_as_t( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT32;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 8, 4 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_i_as_t( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_i_as_t( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_k( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT16;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 4, 2 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static int16_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_k( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_k( struct ndarray *arrays[], void *fcn );
```

#### stdlib_ndarray_k_as_b( \*arrays\[], \*fcn )

Applies a nullary callback and assigns results to elements in an output ndarray.

```c
#include "stdlib/ndarray/dtypes.h"
#include "stdlib/ndarray/index_modes.h"
#include "stdlib/ndarray/orders.h"
#include "stdlib/ndarray/ctor.h"
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

// Define the ndarray data type:
enum STDLIB_NDARRAY_DTYPE xdtype = STDLIB_NDARRAY_INT16;

// Create an underlying byte array:
uint8_t xbuf[] = { 0, 0, 0, 0, 0, 0, 0, 0 };

// Define the number of dimensions:
int64_t ndims = 2;

// Define the array shape:
int64_t shape[] = { 2, 2 };

// Define the strides:
int64_t sx[] = { 4, 2 };

// Define the index offset:
int64_t ox = 0;

// Define the array order:
enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;

// Specify the index mode:
enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;

// Specify the subscript index modes:
int8_t submodes[] = { imode };
int64_t nsubmodes = 1;

// Create an output ndarray:
struct ndarray *x = stdlib_ndarray_allocate( xdtype, xbuf, ndims, shape, sx, ox, order, imode, nsubmodes, submodes );
if ( x == NULL ) {
    fprintf( stderr, "Error allocating memory.\n" );
    exit( EXIT_FAILURE );
}

// Create an array containing a pointer to the ndarray:
struct ndarray *arrays[] = { x };

// Define a callback:
static uint8_t fcn( void ) {
    return 10;
}

// Apply the callback:
int8_t status = stdlib_ndarray_k_as_b( arrays, (void *)fcn );
if ( status != 0 ) {
    fprintf( stderr, "Error during computation.\n" );
    exit( EXIT_FAILURE );
}

// ...

// Free allocated memory:
stdlib_ndarray_free( x );
```

The function accepts the following arguments:

-   **arrays**: `[inout] struct ndarray**` array whose only element is a pointer to an output ndarray.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
int8_t stdlib_ndarray_k_as_b( struct ndarr