Question

我的json文件看起来像这样：

 { 
   "results": {
    "name1": {
        "printouts": {
            "property1": [{
                    "someName": "someText",
                    "someName2": "someURL",
                    "someName3": integer,
                    "someName4": boolean
                }
            ],
            "property2": [
                "someText"
            ],
            "property3": [
                "someText"
            ],
            "property4": [
                "someText"
            ],
            "property5": [
                "someText"
            ],
            "property6": [
                "someText"
            ]
        },
        "someName": "someText",
        "someName2": "someURL",
        "someName3": integer,
        "someName4": boolean
    },
    "name2": {
        "printouts": {
            "property1": [{
                    "fulltext": "someText",
                    "fullurl": "someURL",
                    "namespace": integer,
                    "exists": boolean
                }
            ],
            "property2": [
                "someText"
            ],
            "property3": [
                "someText"
            ],
            "property4": [
                "someText"
            ],
            "property5": [
                "someText"
            ],
            "property6": [
                "someText"
            ]
        },
        "someName": "someText",
        "someName2": "someURL",
        "someName3": integer,
        "someName4": boolean
    },
 ......
}

我想要的是访问property6中每个对象的printouts。到目前为止我做了什么：

 for (i in results) {
        if (someOtherArray.length < 1) {
            someOtherArray.push(i.printouts.property6.toString());
        }

但这会让我错误：无法读取未定义的属性property6。我做错了什么？

任何想法？感谢。

Answer 1

基本上，您使用

错误地访问了该属性

i.printouts.property6

它必须是一个带有property accessor的对象，并带有变量的括号表示法。

data.results[i].printouts.property6
//^^^^^^^^^^^^^

然后你可以迭代键并选择你想要的属性。

var data = { results: { name1: { printouts: { property1: [{ someName: "someText", someName2: "someURL", someName3: 33, someName4: false }], property2: ["someText"], property3: ["someText"], property4: ["someText"], property5: ["someText"], property6: ["someText"] }, someName: "someText", someName2: "someURL", someName3: 37, someName4: true }, name2: { printouts: { property1: [{ fulltext: "someText", fullurl: "someURL", namespace: 35, "exists": true }], property2: ["someText"], property3: ["someText"], property4: ["someText"], property5: ["someText"], property6: ["someText"] }, someName: "someText", someName2: "someURL", someName3: 34, someName4: false } } };

Object.keys(data.results).forEach(function (k) {
    console.log(data.results[k].printouts.property6);
});

javascript对象属性未定义，但它就在那里

1 个答案: