Question

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"}]
    }
];

如何在javascript中访问“Child21”？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

这对我来说很合适：

myList[1].children[0].childname

这也没关系：

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

完整，

<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;

在FireFox的Firebug作品中

Answer 3

此工作......

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

Answer 4

你的第一个选择......

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

应该可以正常工作。

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

4 个答案: