Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | /**
* @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 hasOwnProp = require( '@stdlib/assert/has-own-property' );
var isPlainObject = require( '@stdlib/assert/is-plain-object' );
var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive;
var isComplexDataType = require( '@stdlib/ndarray/base/assert/is-complex-floating-point-data-type' );
var isAccessorArray = require( '@stdlib/array/base/assert/is-accessor-array' );
var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
var accessorSetter = require( '@stdlib/array/base/accessor-setter' );
var setter = require( '@stdlib/array/base/setter' );
var buffer = require( '@stdlib/ndarray/base/buffer' );
var getDType = require( '@stdlib/ndarray/dtype' );
var getOrder = require( '@stdlib/ndarray/order' );
var ndarray = require( '@stdlib/ndarray/ctor' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Converts a scalar value to a zero-dimensional ndarray having the same data type as a provided ndarray.
*
* ## Notes
*
* - If a `dtype` option is not provided and `value`
*
* - is a number, the default data type is the default real-valued floating-point data type.
* - is a boolean, the default data type is the default boolean data type.
* - is a complex number object of a known complex data type, the data type is the same as the provided value.
* - is a complex number object of an unknown complex data type, the default data type is the default complex-valued floating-point data type.
* - is any other value type, the default data type is `'generic'`.
*
* @param {ndarray} x - input ndarray
* @param {*} value - scalar value
* @param {Options} [options] - function options
* @param {*} [options.dtype] - output array data type
* @param {string} [options.order] - memory layout (either row-major or column-major)
* @param {boolean} [options.readonly=false] - boolean indicating whether an array should be read-only
* @throws {TypeError} first argument must be an ndarray
* @throws {TypeError} options argument must be an object
* @throws {TypeError} `dtype` option must be a recognized data type
* @returns {ndarray} ndarray
*
* @example
* var getShape = require( '@stdlib/ndarray/shape' );
* var getDType = require( '@stdlib/ndarray/dtype' );
* var array = require( '@stdlib/ndarray/array' );
*
* var x = array( [ 1.0, 2.0, 3.0 ] );
* // returns <ndarray>[ 1.0, 2.0, 3.0 ]
*
* var out = scalar2ndarrayLike( x, 1.0, {
* 'dtype': 'float64'
* });
* // returns <ndarray>[ 1.0 ]
*
* var sh = getShape( out );
* // returns []
*
* var dt = String( getDType( out ) );
* // returns 'float64'
*/
function scalar2ndarrayLike( x, value, options ) {
var opts;
var buf;
var flg;
var set;
var dt;
var v;
if ( !isndarrayLike( x ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an ndarray. Value: `%s`.', x ) );
}
opts = {
'dtype': getDType( x ),
'order': getOrder( x ),
'readonly': false
};
if ( arguments.length > 2 ) {
if ( !isPlainObject( options ) ) {
throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
}
if ( hasOwnProp( options, 'dtype' ) ) {
opts.dtype = options.dtype;
}
if ( hasOwnProp( options, 'order' ) ) {
opts.order = options.order;
}
if ( hasOwnProp( options, 'readonly' ) ) {
opts.readonly = options.readonly;
}
}
flg = isNumber( value );
dt = opts.dtype;
buf = buffer( dt, 1 );
if ( buf === null ) {
throw new TypeError( format( 'invalid option. `%s` option must be a recognized data type. Option: `%s`.', 'dtype', dt ) );
}
if ( isComplexDataType( dt ) && flg ) {
v = [ value, 0.0 ]; // note: we're assuming that the ComplexXXArray setter accepts an array of interleaved real and imaginary components
} else {
v = value;
}
if ( isAccessorArray( buf ) ) {
set = accessorSetter( dt );
} else {
set = setter( dt );
}
set( buf, 0, v );
return new ndarray( dt, buf, [], [ 0 ], 0, opts.order, opts );
}
// EXPORTS //
module.exports = scalar2ndarrayLike;
|