68 lines
1.7 KiB
JavaScript
68 lines
1.7 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isTypedArray = require( '@stdlib/assert/is-typed-array' );
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var typeName = require( './type.js' );
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// MAIN //
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/**
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* Returns a JSON representation of a typed array.
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*
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* ## Notes
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*
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* - We build a JSON object representing a typed array similar to how Node.js `Buffer` objects are represented. See [Buffer][1].
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*
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* [1]: https://nodejs.org/api/buffer.html#buffer_buf_tojson
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*
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* @param {TypedArray} arr - typed array to serialize
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* @throws {TypeError} first argument must be a typed array
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* @returns {Object} JSON representation
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*
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* @example
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* var Float64Array = require( '@stdlib/array/float64' );
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*
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* var arr = new Float64Array( [ 5.0, 3.0 ] );
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* var json = toJSON( arr );
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* // returns { 'type': 'Float64Array', 'data': [ 5.0, 3.0 ] }
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*/
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function toJSON( arr ) {
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var out;
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var i;
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if ( !isTypedArray( arr ) ) {
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throw new TypeError( 'invalid argument. Must provide a typed array. Value: `' + arr + '`.' );
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}
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out = {};
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out.type = typeName( arr );
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out.data = [];
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for ( i = 0; i < arr.length; i++ ) {
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out.data.push( arr[ i ] );
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}
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return out;
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}
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// EXPORTS //
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module.exports = toJSON;
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