All files / ndarray/base/nullary/lib 0d_accessors.js

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/**
* @license Apache-2.0
*
* Copyright (c) 2023 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';
 
// MAIN //
 
/**
* Applies a nullary function and assigns results to elements in an output ndarray.
*
* @private
* @param {Object} x - object containing ndarray meta data
* @param {string} x.dtype - data type
* @param {Collection} x.data - data buffer
* @param {NonNegativeIntegerArray} x.shape - dimensions
* @param {IntegerArray} x.strides - stride lengths
* @param {NonNegativeInteger} x.offset - index offset
* @param {string} x.order - specifies whether `x` is row-major (C-style) or column-major (Fortran-style)
* @param {Array<Function>} x.accessors - data buffer accessors
* @param {Callback} fcn - nullary callback
* @returns {void}
*
* @example
* var Complex64Array = require( '@stdlib/array/complex64' );
* var Complex64 = require( '@stdlib/complex/float32/ctor' );
* var realf = require( '@stdlib/complex/float32/real' );
* var imagf = require( '@stdlib/complex/float32/imag' );
*
* function fcn() {
*     return new Complex64( 10.0, -10.0 );
* }
*
* // Create a data buffer:
* var xbuf = new Complex64Array( 4 );
*
* // Define the shape of the output array:
* var shape = [];
*
* // Define the array strides:
* var sx = [ 0 ];
*
* // Define the index offset:
* var ox = 1;
*
* // Define getters and setters:
* function getter( buf, idx ) {
*     return buf.get( idx );
* }
*
* function setter( buf, idx, value ) {
*     buf.set( value, idx );
* }
*
* // Create the output ndarray-like object:
* var x = {
*     'dtype': 'complex64',
*     'data': xbuf,
*     'shape': shape,
*     'strides': sx,
*     'offset': ox,
*     'order': 'row-major',
*     'accessors': [ getter, setter ]
* };
*
* // Apply the nullary function:
* nullary0d( x, fcn );
*
* var v = x.data.get( 1 );
*
* var re = realf( v );
* // returns 10.0
*
* var im = imagf( v );
* // returns -10.0
*/
function nullary0d( x, fcn ) {
	x.accessors[ 1 ]( x.data, x.offset, fcn() );
}
 
 
// EXPORTS //
 
module.exports = nullary0d;