@stdlib/ndarray-base-ctor
Version:
Base multidimensional array.
86 lines (72 loc) • 1.96 kB
JavaScript
/**
* @license Apache-2.0
*
* Copyright (c) 2018 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 real = require( '@stdlib/complex-float64-real' );
var imag = require( '@stdlib/complex-float64-imag' );
// MAIN //
/**
* Serializes an ndarray as a JSON object.
*
* ## Notes
*
* - The method does **not** serialize data outside of the buffer region defined by the array configuration.
*
* @private
* @returns {Object} JSON representation
*/
function toJSON() {
/* eslint-disable no-invalid-this */
var out;
var len;
var v;
var i;
len = this._length;
// Build an object containing all ndarray properties needed to revive a serialized ndarray...
out = {};
out.type = 'ndarray';
out.dtype = this.dtype;
out.flags = {
'READONLY': this._flags.READONLY
};
out.order = this._order;
out.shape = this._shape.slice();
out.strides = this._strides.slice();
// Flip the signs of negative strides:
for ( i = 0; i < len; i++ ) {
if ( out.strides[ i ] < 0 ) {
out.strides[ i ] *= -1;
}
}
// Cast data to generic array...
out.data = [];
if ( out.dtype === 'complex64' || out.dtype === 'complex128' ) {
for ( i = 0; i < len; i++ ) {
v = this.iget( i );
out.data.push( real( v ), imag( v ) );
}
} else {
for ( i = 0; i < len; i++ ) {
out.data.push( this.iget( i ) );
}
}
return out;
/* eslint-enable no-invalid-this */
}
// EXPORTS //
module.exports = toJSON;