npm package: @stdlib/ndarray-base-broadcast-scalar
Description: Broadcast a scalar value to an ndarray having a specified shape.
Author: The Stdlib Authors
Latest version: 0.2.4

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# broadcastScalar

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> Broadcast a scalar value to an [ndarray][@stdlib/ndarray/base/ctor] having a specified shape.

<!-- 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">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/ndarray-base-broadcast-scalar
```

</section>

<section class="usage">

## Usage

```javascript
var broadcastScalar = require( '@stdlib/ndarray-base-broadcast-scalar' );
```

#### broadcastScalar( value, dtype, shape, order )

Broadcasts a scalar value to an [ndarray][@stdlib/ndarray/base/ctor] having a specified shape and [data type][@stdlib/ndarray/dtypes].

```javascript
var getShape = require( '@stdlib/ndarray-shape' );
var getDType = require( '@stdlib/ndarray-dtype' );

var x = broadcastScalar( 1.0, 'float64', [ 2, 2 ], 'row-major' );
// returns <ndarray>

var sh = getShape( x );
// returns [ 2, 2 ]

var dt = getDType( x );
// returns 'float64'

var v = x.get( 0, 0 );
// returns 1.0
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   If `value` is a number and [`dtype`][@stdlib/ndarray/dtypes] is a complex [data type][@stdlib/ndarray/dtypes], the function returns an [ndarray][@stdlib/ndarray/base/ctor] containing a complex number whose real component equals the provided scalar `value` and whose imaginary component is zero.
-   The returned [ndarray][@stdlib/ndarray/base/ctor] is a view on an [ndarray][@stdlib/ndarray/base/ctor] data buffer containing a single element. The view is **not** contiguous. As more than one element of a returned view may refer to the same memory location, writing to the view may affect multiple elements. If you need to write to the returned [ndarray][@stdlib/ndarray/base/ctor], copy the [ndarray][@stdlib/ndarray/base/ctor] **before** performing operations which may mutate elements.
-   The returned [ndarray][@stdlib/ndarray/base/ctor] is a "base" [ndarray][@stdlib/ndarray/base/ctor], and, thus, the returned [ndarray][@stdlib/ndarray/base/ctor] does not perform bounds checking or afford any of the guarantees of the non-base [ndarray][@stdlib/ndarray/ctor] constructor. The primary intent of this function is to broadcast a scalar value as an [ndarray][@stdlib/ndarray/base/ctor] within internal implementations and to do so with minimal overhead.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var dtypes = require( '@stdlib/ndarray-dtypes' );
var broadcastScalar = require( '@stdlib/ndarray-base-broadcast-scalar' );

// Get a list of data types:
var dt = dtypes( 'integer_and_generic' );

// Generate two-dimensional arrays...
var x;
var i;
for ( i = 0; i < dt.length; i++ ) {
    x = broadcastScalar( i, dt[ i ], [ 2, 2 ], 'row-major' );
    console.log( x.get( 0, 1 ) );
}
```

</section>

<!-- /.examples -->

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* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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[@stdlib/ndarray/base/ctor]: https://www.npmjs.com/package/@stdlib/ndarray-base-ctor

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