npm package: @stdlib/blas-ext-base-ndarray-dsorthp
Description: Sort a one-dimensional double-precision floating-point ndarray using heapsort.
Author: The Stdlib Authors
Latest version: 0.1.1

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# dsorthp

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

> Sort a one-dimensional double-precision floating-point ndarray using heapsort.

<section class="intro">

</section>

<!-- /.intro -->

<section class="installation">

## Installation

```bash
npm install @stdlib/blas-ext-base-ndarray-dsorthp
```

</section>

<section class="usage">

## Usage

```javascript
var dsorthp = require( '@stdlib/blas-ext-base-ndarray-dsorthp' );
```

#### dsorthp( arrays )

Sorts a one-dimensional double-precision floating-point ndarray using heapsort.

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var scalar2ndarray = require( '@stdlib/ndarray-from-scalar' );
var ndarray2array = require( '@stdlib/ndarray-to-array' );
var ndarray = require( '@stdlib/ndarray-base-ctor' );

var xbuf = new Float64Array( [ 1.0, -2.0, 3.0, -4.0 ] );
var x = new ndarray( 'float64', xbuf, [ 4 ], [ 1 ], 0, 'row-major' );

var order = scalar2ndarray( 1.0, {
    'dtype': 'generic'
});

var out = dsorthp( [ x, order ] );
// returns <ndarray>

var arr = ndarray2array( out );
// returns [ -4.0, -2.0, 1.0, 3.0 ]
```

The function has the following parameters:

-   **arrays**: array-like object containing a one-dimensional input ndarray and a zero-dimensional ndarray specifying the sort order.

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The input ndarray is sorted **in-place** (i.e., the input ndarray is **mutated**).
-   When the sort order is less than zero, the input ndarray is sorted in **decreasing** order. When the sort order is greater than zero, the input ndarray is sorted in **increasing** order. When the sort order is equal to zero, the input ndarray is left unchanged.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var ndarray = require( '@stdlib/ndarray-base-ctor' );
var scalar2ndarray = require( '@stdlib/ndarray-from-scalar' );
var ndarray2array = require( '@stdlib/ndarray-to-array' );
var ndarraylike2scalar = require( '@stdlib/ndarray-base-ndarraylike2scalar' );
var dsorthp = require( '@stdlib/blas-ext-base-ndarray-dsorthp' );

var xbuf = discreteUniform( 10, -100, 100, {
    'dtype': 'float64'
});
var x = new ndarray( 'float64', xbuf, [ xbuf.length ], [ 1 ], 0, 'row-major' );
console.log( ndarray2array( x ) );

var order = scalar2ndarray( 1.0, {
    'dtype': 'generic'
});
console.log( 'Order:', ndarraylike2scalar( order ) );

dsorthp( [ x, order ] );
console.log( ndarray2array( x ) );
```

</section>

<!-- /.examples -->

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<section class="related">

</section>

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* * *

## Notice

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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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