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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | 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 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 20x 20x 84x 58x 58x 8x 8x 58x 31x 31x 58x 13x 13x 58x 9x 9x 58x 56x 84x 25x 20x 25x 2x 5x 2x 2x 3x 1x 1x 84x 31x 31x 56x 84x 11x 11x 84x 2x 84x 43x 43x 84x 10x 84x 35x 35x 45x 84x 84x 84x 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/array/base/assert/is-complex-floating-point-data-type' );
var isPositiveIntegerArray = require( '@stdlib/assert/is-positive-integer-array' );
var isComplexLike = require( '@stdlib/assert/is-complex-like' );
var isBoolean = require( '@stdlib/assert/is-boolean' ).isPrimitive;
var isAccessorArray = require( '@stdlib/array/base/assert/is-accessor-array' );
var accessorSetter = require( '@stdlib/array/base/accessor-setter' );
var zeros = require( '@stdlib/array/zeros' );
var setter = require( '@stdlib/array/base/setter' );
var buffer = require( '@stdlib/ndarray/base/buffer' );
var ndarray = require( '@stdlib/ndarray/ctor' );
var numel = require( '@stdlib/ndarray/base/numel' );
var defaults = require( '@stdlib/ndarray/defaults' );
var dtype = require( '@stdlib/complex/dtype' );
var format = require( '@stdlib/string/format' );
// VARIABLES //
var ORDER = defaults.get( 'order' );
var DEFAULT_REAL = defaults.get( 'dtypes.real_floating_point' );
var DEFAULT_CMPLX = defaults.get( 'dtypes.complex_floating_point' );
var DEFAULT_BOOL = defaults.get( 'dtypes.boolean' );
// MAIN //
/**
* Broadcasts a scalar value to an ndarray of a specified shape.
*
* ## 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 {Array<NonNegativeInteger>} shape - shape of the output ndarray
* @param {*} value - scalar value
* @param {Options} [options] - function options
* @param {string} [options.dtype] - output array data type
* @param {string} [options.order="row-major"] - memory layout (either row-major or column-major)
* @param {boolean} [options.readonly=false] - boolean indicating whether an array should be read-only
* @param {TypeError} - first argument must be an array of non-negative integers
* @throws {TypeError} second argument must be an object
* @throws {TypeError} `dtype` option must be a recognized data type
* @returns {ndarray} ndarray
*
* @example
* var getDType = require( '@stdlib/ndarray/dtype' );
*
* var x = broadcastScalar( [ 2, 2 ], 1.0 );
* // returns <ndarray>[ [ 1.0, 1.0 ], [ 1.0, 1.0 ] ]
*
* var dt = getDType( x );
* // returns 'float64'
*/
function broadcastScalar( shape, value, options ) {
var opts;
var buf;
var flg;
var set;
var dt;
var v;
var N;
opts = {
'dtype': '',
'order': ORDER,
'readonly': false
};
if ( !isPositiveIntegerArray( shape ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an array of non-negative integers. Value: `%s`.', shape ) );
}
if ( arguments.length > 2 ) {
options = arguments[ 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 );
if ( opts.dtype === '' ) {
if ( flg ) {
dt = DEFAULT_REAL;
} else if ( isBoolean( value ) ) {
dt = DEFAULT_BOOL;
} else if ( isComplexLike( value ) ) {
dt = dtype( value );
if ( dt === null ) {
dt = DEFAULT_CMPLX;
}
} else {
dt = 'generic';
}
} else {
dt = opts.dtype;
}
buf = buffer( dt, numel( shape ) );
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 );
N = shape.length || 1;
return new ndarray( dt, buf, shape, zeros( N ), 0, opts.order, opts );
}
// EXPORTS //
module.exports = broadcastScalar;
|