在JSON中访问嵌套的数组对象和值

Question

我有以下JSON结构，我需要迭代data.list的嵌套值。当我使用下面的console.log(data["list"][0]["My website is https://www.test.com"][0][0].command);进行硬编码时，我能够获得嵌套值，但是当我尝试迭代data.list的所有对象时，却无法获得嵌套值。

var data = { 
    "list": [ 
     { 
      "The first website is https://www.w3.org/": [ 
       [ 
        { 
         "command": "This is dummy content", 
         "new": false, 
         "message": "This was fun to make" 
        } 
       ] 
      ] 
     }, 
     { 
      "The second website is https://www.mozilla.org": [ 
       [ 
        { 
         "command": "This is the second command", 
         "new": true, 
         "message": "Lorem ipsum" 
        } 
       ] 
      ] 
     } 
    ], 
    "verified": false 
}; 


for (var i = 0; i < data.list.length; i++) { 
     // this doesn't work 
     console.log(data.list[i][0]["0"]["0"]).command; 
} 

Answer 1

您可以使用对象中的第一个键。

var data = { list: [{ "The first website is https://www.w3.org/": [[{ command: "This is dummy content", new: false, message: "This was fun to make" }]] }, { "The second website is https://www.mozilla.org": [[{ command: "This is the second command", new: true, message: "Lorem ipsum" }]] }], verified: false }, 
 
    i; 
 

 
for (i = 0; i < data.list.length; i++) { 
 
    console.log(data.list[i][Object.keys(data.list[i])[0]][0][0].command); 
 
}

Answer 2

因为在列表中的项目是你在一个单独的循环遍历这些对象。此外，您必须考虑到它是一个对象，所以您应该使用对象属性作为索引而不是整数。

下应该工作：

for (var i = 0; i < data.list.length; i++) { 
     // this doesn't work 
     for (var property in data.list[i]) { 
      console.log(data.list[i][property][0][0].command); 
     } 
}