All files / ndarray/gsorthp/lib main.js

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/**
* @license Apache-2.0
*
* Copyright (c) 2025 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
 
'use strict';
 
// MODULES //
 
var ndarraylike2scalar = require( '@stdlib/ndarray/base/ndarraylike2scalar' );
var numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
var getStride = require( '@stdlib/ndarray/base/stride' );
var getOffset = require( '@stdlib/ndarray/base/offset' );
var getData = require( '@stdlib/ndarray/base/data-buffer' );
var strided = require( '@stdlib/blas/ext/base/gsorthp' ).ndarray;
 
 
// MAIN //
 
/**
* Sorts a one-dimensional ndarray using heapsort.
*
* ## Notes
*
* -   The function expects the following ndarrays:
*
*     -   a one-dimensional input ndarray.
*     -   a zero-dimensional ndarray specifying the sort order.
*
* -   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.
*
* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
* @returns {Object} input ndarray
*
* @example
* var vector = require( '@stdlib/ndarray/vector/ctor' );
* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
*
* var x = vector( [ 1.0, -2.0, 3.0, -4.0 ], 'generic' );
*
* var ord = scalar2ndarray( 1.0, {
*    'dtype': 'generic'
* });
*
* var out = gsorthp( [ x, ord ] );
* // returns <ndarray>[ -4.0, -2.0, 1.0, 3.0 ]
*/
function gsorthp( arrays ) {
	var ord;
	var x;

	x = arrays[ 0 ];
	ord = ndarraylike2scalar( arrays[ 1 ] );
	strided( numelDimension( x, 0 ), ord, getData( x ), getStride( x, 0 ), getOffset( x ) ); // eslint-disable-line max-len
	return x;
}
 
 
// EXPORTS //
 
module.exports = gsorthp;