Question

我遇到了将单个JavaScript对象转换为正确的JavaScript数组的问题。

列表如下所示：

{ "property1": "value", someArray: [123], "property2": [] }
{ "property1": "value", someArray: [123], "property2": [] }
{ "property1": "value", someArray: [123], "property2": [] }
{ "property1": "value", someArray: [123], "property2": [] }
{ "property1": "value", someArray: [123], "property2": [] }

因此，正如您所看到的，我需要注意两件事：

添加缺少的逗号
从中创建数组。

要解析此响应，我使用节点JS。我试图将其转换为数组，如下所示：

const array = `[${response.data}.replace(/}/g, '},')}{}]`

首先，我用数组包装所有内容，添加逗号和一个空对象以摆脱最后一个不需要的逗号。

如果我查看输出，一切似乎都很好，但是当我尝试用JSON.parse()解析时，我收到了

位置n出乎意料的']'

由于时间太长，我不确定我是在做错什么还是数据已损坏。

Answer 1

您可以使用正则表达式在每行的末尾添加逗号，但最后一行，将java.lang.RuntimeException: Unable to start activity ComponentInfo{.quickblox_videocalling.activities.CallActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.videochat.webrtc.QBRTCAudioTrack com.quickblox.videochat.webrtc.QBMediaStreamManager.getLocalAudioTrack()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6944) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.videochat.webrtc.QBRTCAudioTrack com.quickblox.videochat.webrtc.QBMediaStreamManager.getLocalAudioTrack()' on a null object reference at com.ahgp.quickblox_videocalling.activities.CallActivity.initAudioManager(CallActivity.java:396) at com.ahgp.quickblox_videocalling.activities.CallActivity.onCreate(CallActivity.java:192) at android.app.Activity.performCreate(Activity.java:7183) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6944) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) 2019-05-17 13:06:08.148 11514-11514/com.ahgp E/UncaughtException: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ahgp/com.ahgp.quickblox_videocalling.activities.CallActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.videochat.webrtc.QBRTCAudioTrack com.quickblox.videochat.webrtc.QBMediaStreamManager.getLocalAudioTrack()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2957) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3032) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1696) at android.os.Handler.dispatchMessage(Handler.java:105) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6944) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.quickblox.videochat.webrtc.QBRTCAudioTrack com.quickblox.videochat.webrtc.QBMediaStreamManager.getLocalAudioTrack()' on a null object reference at com.ahgp.quickblox_videocalling.activities.CallActivity.initAudioManager(CallActivity.java:396) at com.ahgp.quickblox_videocalling.activities.CallActivity.onCreate(CallActivity.java:192) at android.app.Activity.performCreate(Activity.java:7183) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2910)更改为someArray，然后将整个字符串括在"someArray"和{{1 }}：

[]

但这仍然是一个X / Y问题-更好地修复为您提供服务（有效破坏了数据）的任何东西，使其获取正确的JSON来代替，这样就不需要这样的破解了。

Answer 2

您需要省略最后一个逗号，如果要再输入一些字符，请向前看。

const array = `[${response.data}.replace(/}(?=.)/g, '},')}{}]`;
//                                         ^^^^^

Answer 3

如果您确实无法修改此列表的响应，则可以使用以下方法：

const array = response.data.split(/\r?\n/).map(object => JSON.parse(object.replace("someArray", "\"$&\"")));

每行将被split(/\r?\n/)分隔，replace("someArray", "\"$&\"")将在someArray周围添加缺失的双引号。

工作示例：

const response = {
  "data": `{ "property1": "value", someArray: [123], "property2": [] }
           { "property1": "value", someArray: [123], "property2": [] }
           { "property1": "value", someArray: [123], "property2": [] }
           { "property1": "value", someArray: [123], "property2": [] }
           { "property1": "value", someArray: [123], "property2": [] }`
}

const array = response.data.split(/\r?\n/).map(line => JSON.parse(line.replace("someArray", "\"$&\"")));

console.log(array);

单个JavaScript对象的列表，以适当的数组

3 个答案: