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* @license Apache-2.0
*
* Copyright (c) 2026 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 isComplexFloatingPointDataType = require( '@stdlib/ndarray/base/assert/is-complex-floating-point-data-type' ); // eslint-disable-line id-length
var emptyLike = require( '@stdlib/ndarray/base/empty-like' );
var fill = require( '@stdlib/ndarray/base/fill' );
var dtype = require( '@stdlib/ndarray/base/dtype' );
var CNAN = require( '@stdlib/constants/complex128/nan' );
// MAIN //
/**
* Creates a NaN-filled ndarray having the same shape and data type as a provided ndarray.
*
* @param {ndarray} x - input array
* @returns {ndarray} ndarray
*
* @example
* var getShape = require( '@stdlib/ndarray/shape' );
* var getDType = require( '@stdlib/ndarray/dtype' );
* var ones = require( '@stdlib/ndarray/ones' );
*
* var x = ones( [ 2, 2 ], {
* 'dtype': 'float32'
* });
* // returns <ndarray>[ [ 1.0, 1.0 ], [ 1.0, 1.0 ] ]
*
* var y = nansLike( x );
* // returns <ndarray>[ [ NaN, NaN ], [ NaN, NaN ] ]
*
* var sh = getShape( y );
* // returns [ 2, 2 ]
*
* var dt = String( getDType( y ) );
* // returns 'float32'
*/
function nansLike( x ) {
if ( isComplexFloatingPointDataType( dtype( x ) ) ) {
return fill( emptyLike( x ), CNAN );
}
return fill( emptyLike( x ), NaN );
}
// EXPORTS //
module.exports = nansLike;
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