从Javascript中的JSON获取多个无组织的值

Question

我有以下javascript

{
 "Exists":true,
 "Id":"c558eedac67244908fc127d028663b96",
 "Type":6,"Fav":false,
 "Shield":false,
 "Tags":" 
    [{\"TagId\":\"T1\",\"TagName\":\"test2\",\"TagType\":1}, 
    {\"TagId\":\"T2\",\"TagName\":\"test1\",\"TagType\":1}]"
}

我想做的是使用javascript从TagName部分获得Tags

当我使用JSON.parse(Obj.Tags);时，我会在Tags部分得到所有我只想要TagName的地方

有可能吗？

Answer 1

有可能。您可以使用.map函数。

var tagNames = obj.Tags.map(function(x){
    return x.TagName;
});

var obj = {
 "Exists":true,
 "Id":"c558eedac67244908fc127d028663b96",
 "Type":6,"Fav":false,
 "Shield":false,
 "Tags": 
    [{"TagId":"T1","TagName":"test2","TagType":1}, 
    {"TagId":"T2","TagName":"test1","TagType":1}]
};

var tagNames = obj.Tags.map(function(x){
	return x.TagName;
})

console.log(tagNames)

Answer 2

我想我可能知道您的问题是什么。

您是否希望您的标签仅是TagName的数组？

下面是示例代码：

var Obj = {
 "Exists":true,
 "Id":"c558eedac67244908fc127d028663b96",
 "Type":6,"Fav":false,
 "Shield":false,
 "Tags":"[{\"TagId\":\"T1\",\"TagName\":\"test2\",\"TagType\":1},  {\"TagId\":\"T2\",\"TagName\":\"test1\",\"TagType\":1}]"
}

// Get Tags data to array object

var Tags = JSON.parse(Obj.Tags);

// Get simple array of TagNames

var TagNames = Tags.map(x=>x.TagName);
console.log(TagNames);

// Get array of objects with only TagName key value pair

var TagNamesFormat2 = Tags.map(function(x){
  return {"TagName" : x.TagName}
});

console.log(TagNamesFormat2);

Answer 3

您可以在标记

上使用map()

// Parsed object
var data = {
 "Exists": true,
 "Id":"c558eedac67244908fc127d028663b96",
 "Type":6,
 "Fav":false,
 "Shield":false,
 "Tags": [
    {"TagId":"T1","TagName":"test2","TagType":1}, 
    {"TagId":"T2","TagName":"test1","TagType":1}
 ]
}

console.log(data.Tags.map(tag => tag.TagName));

Answer 4

尝试tags.map(a => a.TagName);

var myObj = {
             "Exists":true,
             "Id":"c558eedac67244908fc127d028663b96",
             "Type":6,"Fav":false,
             "Shield":false,
             "Tags":"[{\"TagId\":\"T1\",\"TagName\":\"test2\",\"TagType\":1},     {\"TagId\":\"T2\",\"TagName\":\"test1\",\"TagType\":1}]"
            };
            
var tags = JSON.parse(myObj.Tags);
var tagNames = tags.map(a => a.TagName);
console.log(tagNames);