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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | 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 111x 111x 111x 111x 111x 111x 111x 111x 111x 111x 111x 111x 20x 20x 91x 91x 111x 76x 76x 8x 8x 76x 22x 22x 9x 9x 13x 76x 46x 46x 76x 24x 24x 1x 24x 11x 11x 76x 35x 35x 76x 24x 24x 24x 24x 76x 10x 10x 76x 9x 9x 76x 8x 8x 111x 15x 15x 15x 15x 111x 62x 111x 61x 61x 111x 1x 1x 1x 1x 62x 111x 1x 1x 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2022 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 isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
var isPlainObject = require( '@stdlib/assert/is-plain-object' );
var isNonNegativeIntegerArray = require( '@stdlib/assert/is-nonnegative-integer-array' ).primitives;
var isEmptyCollection = require( '@stdlib/assert/is-empty-collection' );
var hasOwnProp = require( '@stdlib/assert/has-own-property' );
var contains = require( '@stdlib/array/base/assert/contains' ).factory;
var shape2strides = require( '@stdlib/ndarray/base/shape2strides' );
var buffer = require( '@stdlib/ndarray/base/buffer' );
var numel = require( '@stdlib/ndarray/base/numel' );
var getDType = require( '@stdlib/ndarray/dtype' );
var getShape = require( '@stdlib/ndarray/shape' );
var getOrder = require( '@stdlib/ndarray/order' );
var ndarray = require( '@stdlib/ndarray/ctor' );
var dtypes = require( '@stdlib/ndarray/dtypes' );
var join = require( '@stdlib/array/base/join' );
var format = require( '@stdlib/string/format' );
// VARIABLES //
var DTYPES = dtypes( 'numeric_and_generic' );
var isDataType = contains( DTYPES );
// MAIN //
/**
* Creates a zero-filled ndarray having the same shape and data type as a provided ndarray.
*
* @param {ndarray} x - input array
* @param {Options} [options] - function options
* @param {*} [options.dtype] - output array data type (overrides the input array's inferred data type)
* @param {string} [options.order] - specifies whether the output array should be 'row-major' (C-style) or 'column-major' (Fortran-style) (overrides the input array's inferred order)
* @param {(NonNegativeIntegerArray|NonNegativeInteger)} [options.shape] - output array shape (overrides the input array's inferred shape)
* @param {string} [options.mode="throw"] - specifies how to handle indices which exceed array dimensions
* @param {ArrayLikeObject<string>} [options.submode=["throw"]] - specifies how to handle subscripts which exceed array dimensions on a per dimension basis
* @param {boolean} [options.readonly=false] - boolean indicating whether an array should be read-only
* @throws {TypeError} first argument must have a recognized data type
* @throws {TypeError} options argument must be an object
* @throws {TypeError} `dtype` option must be a supported data type
* @throws {TypeError} `order` option must be a supported order
* @throws {TypeError} `shape` option must be either a nonnegative integer or an array of nonnegative integers
* @throws {TypeError} must provide valid options
* @returns {ndarray} ndarray
*
* @example
* var getShape = require( '@stdlib/ndarray/shape' );
* var getDType = require( '@stdlib/ndarray/dtype' );
* var zeros = require( '@stdlib/ndarray/zeros' );
*
* var x = zeros( [ 2, 2 ] );
* // returns <ndarray>[ [ 0.0, 0.0 ], [ 0.0, 0.0 ] ]
*
* var y = zerosLike( x );
* // returns <ndarray>[ [ 0.0, 0.0 ], [ 0.0, 0.0 ] ]
*
* var sh = getShape( y );
* // returns [ 2, 2 ]
*
* var dt = String( getDType( y ) );
* // returns 'float64'
*/
function zerosLike( x ) {
var options;
var dtype;
var order;
var ndims;
var opts;
var len;
var flg;
var st;
var sh;
if ( !isndarrayLike( x ) ) {
throw new TypeError( format( 'invalid argument. First argument must be an ndarray-like object. Value: `%s`.', x ) );
}
flg = false;
opts = {};
if ( arguments.length > 1 ) {
options = arguments[ 1 ];
if ( !isPlainObject( options ) ) {
throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
}
if ( hasOwnProp( options, 'dtype' ) ) {
dtype = options.dtype;
if ( !isDataType( dtype ) ) {
throw new TypeError( format( 'invalid option. `%s` option must be one of the following: "%s". Option: `%s`.', 'dtype', join( DTYPES, '", "' ), dtype ) );
}
flg = true;
} else {
dtype = getDType( x );
}
if ( hasOwnProp( options, 'shape' ) ) {
sh = options.shape;
if ( isNonNegativeInteger( sh ) ) {
sh = [ sh ];
} else if ( !isNonNegativeIntegerArray( sh ) && !isEmptyCollection( sh ) ) { // eslint-disable-line max-len
throw new TypeError( format( 'invalid option. `%s` option must be a nonnegative integer or an array of nonnegative integers. Option: `%s`.', 'shape', sh ) );
}
} else {
sh = getShape( x );
}
if ( hasOwnProp( options, 'order' ) ) {
order = options.order;
} else {
order = getOrder( x );
}
if ( hasOwnProp( options, 'mode' ) ) {
opts.mode = options.mode;
}
if ( hasOwnProp( options, 'submode' ) ) {
opts.submode = options.submode;
}
if ( hasOwnProp( options, 'readonly' ) ) {
opts.readonly = options.readonly;
}
} else {
dtype = getDType( x );
sh = getShape( x );
order = getOrder( x );
}
if ( !flg && !isDataType( dtype ) ) {
throw new TypeError( format( 'invalid argument. First argument must have one of the following data types: "%s". Value: `%s`.', join( DTYPES, '", "' ), dtype ) );
}
ndims = sh.length;
if ( ndims > 0 ) {
len = numel( sh );
st = shape2strides( sh, order );
} else {
// For 0-dimensional arrays, the buffer should contain a single element...
len = 1;
st = [ 0 ];
}
return new ndarray( dtype, buffer( dtype, len ), sh, st, 0, order, opts );
}
// EXPORTS //
module.exports = zerosLike;
|