我有两个长度相同且具有相同键的对象。唯一的区别是这些键可能具有不同的值。问题在于，应该对两个对象进行评估的方法会中断-我花了数小时试图弄清楚这个问题。
这是originalReference：
{
"id":68,
"article_id":12338,
"article_reference_id":68,
"article_reference_extraction_id":667320,
"user_id":null,
"file":"1238-230180-1-CE.doc",
"revision":1,
"order":1,
"type":"journal",
"preview":"Chewning B, Bylund CL, Shah B, Arora NK, Gueguen JA, Makoul G. Patient preferences for shared decisions: a systematic review. Patient Educ Couns 2012 Jan; 86(1):9-18",
"status":1,
"source":"Unknown",
"data":{
"pii":"S0738-3991(11)00114-5",
"webciteId":null,
"publication":[
],
"conference":[
],
"authors":[
{
"firstName":"B",
"lastName":"Chewning"
},
{
"firstName":"CL",
"lastName":"Bylund"
},
{
"firstName":"B",
"lastName":"Shah"
},
{
"firstName":"NK",
"lastName":"Arora"
},
{
"firstName":"JA",
"lastName":"Gueguen"
},
{
"firstName":"G",
"lastName":"Makoul"
}
],
"editors":[
{
"firstName":"G",
"lastName":"Makoul"
}
],
"comments":[
],
"source":{
"title":"Patient Educ Couns",
"date":{
"year":"2012",
"month":"01",
"day":null
},
"pages":{
"from":"9",
"to":"18"
},
"volume":"86",
"issue":"1",
"url":"http://europepmc.org/abstract/MED/21474265"
},
"accessDate":null,
"articleTitle":"Patient preferences for shared decisions: a systematic review"
},
"doi":"10.1016/j.pec.2011.02.004",
"pmid":21474265,
"pmcid":null,
"isbn":"",
"created_at":"2019-04-09 10:04:53",
"updated_at":"2019-04-09 10:04:53",
"deleted_at":null,
"max_revision":30,
"extraction":{
"id":667320,
"article_id":12338,
"file":"1238-230180-1-CE.doc",
"order":1,
"original":"Chewning B, Bylund CL, Shah B, Arora NK, Gueguen JA, Makoul G. Patient preferences for shared decisions: A systematic review. Patient Educ Couns [Internet] Elsevier Ireland Ltd; 2012;86(1):9?18. PMID:21474265",
"doi":null,
"pmid":null,
"isbn":null,
"parsed":1,
"created_at":"2019-02-25 18:40:46",
"updated_at":"2019-02-25 18:40:46",
"deleted_at":null
}
}
这是
reference：{
"id":68,
"article_id":12338,
"article_reference_id":68,
"article_reference_extraction_id":667320,
"user_id":null,
"file":"1238-230180-1-CE.doc",
"revision":1,
"order":1,
"type":"journal",
"preview":"Chewning B, Bylund CL, Shah B, Arora NK, Gueguen JA, Makoul G. Patient preferences for shared decisions: a systematic review. Patient Educ Couns 2012 Jan; 86(1):9-18",
"status":1,
"source":"Unknown",
"data":{
"pii":" ",
"webciteId":null,
"publication":[
],
"conference":[
],
"authors":[
{
"lastName":"Chewning",
"firstName":"Betty"
},
{
"lastName":"Bylund",
"firstName":"Carma L."
},
{
"lastName":"Shah",
"firstName":"Bupendra"
},
{
"lastName":"Arora",
"firstName":"Neeraj K."
},
{
"lastName":"Gueguen",
"firstName":"Jennifer A."
},
{
"lastName":null,
"firstName":" "
}
],
"editors":[
{
"firstName":"G",
"lastName":"Makoul"
}
],
"comments":[
],
"source":{
"title":"Patient Education and Counseling",
"date":{
"year":2012,
"month":1,
"day":null
},
"pages":{
"from":"9",
"to":"18"
},
"volume":"86",
"issue":"1",
"url":"http://europepmc.org/abstract/MED/21474265"
},
"accessDate":null,
"articleTitle":"Patient preferences for shared decisions: A systematic review"
},
"doi":"10.1016/j.pec.2011.02.004",
"pmid":21474265,
"pmcid":null,
"isbn":"",
"created_at":"2019-04-09 10:04:53",
"updated_at":"2019-04-09 10:04:53",
"deleted_at":null,
"max_revision":30,
"extraction":{
"id":667320,
"article_id":12338,
"file":"1238-230180-1-CE.doc",
"order":1,
"original":"Chewning B, Bylund CL, Shah B, Arora NK, Gueguen JA, Makoul G. Patient preferences for shared decisions: A systematic review. Patient Educ Couns [Internet] Elsevier Ireland Ltd; 2012;86(1):9?18. PMID:21474265",
"doi":null,
"pmid":null,
"isbn":null,
"parsed":1,
"created_at":"2019-02-25 18:40:46",
"updated_at":"2019-02-25 18:40:46",
"deleted_at":null
}
}
请注意
articleTitle中的originalReference如何输入错误，而articleTitle中的reference具有正确的标题。下面函数的目的是确保如果
originalReference之前具有键的非空/非空/定义值，则reference不应覆盖originalReference中的值。这是同时评估两者的函数。
发生的情况是，当两个变量都明确定义时，它将引发错误
TypeError: Cannot read property 'articleTitle' of undefined。不知道发生了什么。这是函数：
evaluateEmptyValues: function(reference, originalReference) {
var vm = this;
console.log('reference', reference);
console.log('Before --> ' + reference.data.articleTitle);
// Get keys and values of both reference objects
referenceLength = Object.entries(reference).length;
originalReferenceLength = Object.entries(originalReference).length;
if (referenceLength == originalReferenceLength) {
try {
for (var prop in reference) {
if (reference[prop] != undefined || reference[prop] != null) {
if (typeof (reference[prop]) == 'string' && reference[prop].trim() == '') {
reference[prop] = originalReference[prop];
}
if (typeof(reference[prop]) == 'object' && typeof(originalReference[prop]) == 'object') {
console.log('reference[prop]', reference[prop]);
console.log('originalReference[prop]', originalReference);
vm.evaluateEmptyValues(reference[prop], originalReference[prop]);
}
if (Array.isArray(reference[prop]) && typeof Array.isArray(originalReference[prop])) {
reference[prop].forEach((item, index) => vm.evaluateEmptyValues(item, originalReference[prop][index]));
}
} else {
reference[prop] = originalReference[prop];
}
}
} catch(err) {
console.log(err);
}
}
console.log('After --> ' + reference.data.articleTitle);
//
// console.log('Original --> ' + originalReference.data.articleTitle);
}
最佳答案
不应该你的电话
if (reference[prop] != undefined || reference[prop] != null) {
使用AND，像这样吗？
if (reference[prop] != undefined && reference[prop] != null) {