Javascript JSON对象的多级数组 - 如何在第二级或更高级别访问键值对

Question

Consider the following array of JSON objects: 考虑以下JSON对象数组：

myList = [
    {title:"Parent1",
        children:[{childname:"Child11"},
                     {childname:"Child12"}],
        cars:[{carname:"Car11"},
              {carname:"Car12"}]
    },
    {title:"Parent2",
        children:[{childname:"Child21"},
                     {childname:"Child22"}],
        cars:[{carname:"Car21"},
              {carname:"Car22"}]
    }
];

How does one access the "Child21" in javascript? 如何在javascript中访问“Child21”？ The following options didn't work: 以下选项不起作用：

var myString = myList[1].children[0].childname; //Does not work
var myString = myList[1]["children"][0].childname; //Does not work

Answer 1

This worked OK for me: 这对我有用：

myList[1].children[0].childname

This is also OK: 这也没问题：

myList[1]["children"][0].childname;

In full, 在全，

<html>
<body>
<script>
var myList = [
    {title:"Parent1",
        children:[{childname:"Child11"},
                     {childname:"Child12"}],
        cars:[{carname:"Car11"},
              {carname:"Car12"}]
    },
    {title:"Parent2",
        children:[{childname:"Child21"},
                     {childname:"Child22"}],
        cars:[{carname:"Car21"},
              {carname:"Car22"}]
    }
];
alert (myList[1].children[0].childname);
</script>
</body>
</html>

Answer 2

var myString = myList[1].children[0].childname; var myString = myList [1] .children [0] .childname;

In FireFox's Firebug works 在FireFox的Firebug工作中

Answer 3

这确实有效......

alert(myList[1].children[0].childname);

Answer 4

Your first option... 你的第一个选择......

var myString = myList[1].children[0].childname;

should work just fine. 应该工作得很好。

Javascript JSON对象的多级数组 - 如何在第二级或更高级别访问键值对

问题描述

4 个解决方案

解决方案1
9

解决方案2
1 2009-10-30 14:32:59

解决方案3
0 2009-10-30 14:31:21

解决方案4
0 2009-10-30 14:35:14

Javascript JSON对象的多级数组 - 如何在第二级或更高级别访问键值对

问题描述

4 个解决方案

解决方案1 9

解决方案2 1 2009-10-30 14:32:59

解决方案3 0 2009-10-30 14:31:21

解决方案4 0 2009-10-30 14:35:14

解决方案1
9

解决方案2
1 2009-10-30 14:32:59

解决方案3
0 2009-10-30 14:31:21

解决方案4
0 2009-10-30 14:35:14