reviver.js (1402B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var isNumber = require( '@stdlib/assert/is-number' ).isPrimitive; 24 var Complex128 = require( './../../float64' ); 25 26 27 // MAIN // 28 29 /** 30 * Revives a JSON-serialized 128-bit complex number. 31 * 32 * @param {string} key - key 33 * @param {*} value - value 34 * @returns {(*|Complex128)} value or 128-bit complex number 35 * 36 * @example 37 * var parseJSON = require( '@stdlib/utils/parse-json' ); 38 * 39 * var str = '{"type":"Complex128","re":5,"im":3}'; 40 * 41 * var z = parseJSON( str, reviver ); 42 * // returns <Complex128> 43 */ 44 function reviver( key, value ) { 45 if ( 46 value && 47 value.type && 48 value.type === 'Complex128' && 49 isNumber( value.re ) && 50 isNumber( value.im ) 51 ) { 52 return new Complex128( value.re, value.im ); 53 } 54 return value; 55 } 56 57 58 // EXPORTS // 59 60 module.exports = reviver;