Question

我想创建一个像这样的对象：

"store1":
{
  "isbn":"3129321903",
  "title":"here comes the title",
  "author":"author of the book"
},
{
 "isbn":"3333333333",
 "title":"title of second book",
 "author":"author of second book"
}
"store2":
{
  "isbn":"3333311111",
  "title":"title of book from store2",
  "author":"author of book from store2"
}

我试过这样的事情：

var storeArray = [];
for(var i = 0; i < response.data.bookInfo.length; i++){
  var keys = Object.keys(response.data.bookInfo[i]);
  var storename = keys.filter(key => key != 'isbn' && key != 'metadata'); // get storename

  if(storeArray[storename] == undefined){
    storeArray[storename] = response.data.bookInfo[i];
  }
  else{
    storeArray[storename].push(response.data.bookInfo[i]);
  }
}

但是这只会给我带来以下错误：

TypeError：storeArray [“amazon”]。push不是函数

当我使用storeArray[storename] = response.data.bookInfo[i]时，它只显示我在控制台中的一行，我想将响应数据添加到storeArray [storename]以获取商店的书籍列表。

Answer 1

这意味着您的public class BluetoothServices extends Service { private BluetoothAdapter mBluetoothAdapter; public static final String B_DEVICE = "MY DEVICE"; public static final String B_UUID = "00001101-0000-1000-8000-00805f9b34fb"; // 00000000-0000-1000-8000-00805f9b34fb public static final int STATE_NONE = 0; public static final int STATE_LISTEN = 1; public static final int STATE_CONNECTING = 2; public static final int STATE_CONNECTED = 3; private ConnectBtThread mConnectThread; private static ConnectedBtThread mConnectedThread; private static Handler mHandler = null; public static int mState = STATE_NONE; public static String deviceName; public static BluetoothDevice sDevice = null; public Vector<Byte> packData = new Vector<>(2048); //IBinder mIBinder = new LocalBinder(); @Nullable @Override public IBinder onBind(Intent intent) { //mHandler = getApplication().getHandler(); return mBinder; } public void toast(String mess){ Toast.makeText(this,mess,Toast.LENGTH_SHORT).show(); } private final IBinder mBinder = new LocalBinder(); public class LocalBinder extends Binder { BluetoothServices getService() { // Return this instance of LocalService so clients can call public methods return BluetoothServices.this; } } @Override public int onStartCommand(Intent intent, int flags, int startId) { String deviceg = intent.getStringExtra("bluetooth_device"); mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); connectToDevice(deviceg); return START_STICKY; } private synchronized void connectToDevice(String macAddress){ BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(macAddress); if (mState == STATE_CONNECTING){ if (mConnectThread != null){ mConnectThread.cancel(); mConnectThread = null; } } if (mConnectedThread != null){ mConnectedThread.cancel(); mConnectedThread = null; } mConnectThread = new ConnectBtThread(device); toast("connecting"); mConnectThread.start(); setState(STATE_CONNECTING); } private void setState(int state){ mState = state; if (mHandler != null){ // mHandler.obtainMessage(); } } public synchronized void stop(){ setState(STATE_NONE); if (mConnectThread != null){ mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null){ mConnectedThread.cancel(); mConnectedThread = null; } if (mBluetoothAdapter != null){ mBluetoothAdapter.cancelDiscovery(); } stopSelf(); } public void sendData(String message){ if (mConnectedThread!= null){ mConnectedThread.write(message.getBytes()); toast("sent data"); }else { Toast.makeText(BluetoothServices.this,"Failed to send data",Toast.LENGTH_SHORT).show(); } } @Override public boolean stopService(Intent name) { setState(STATE_NONE); if (mConnectThread != null){ mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null){ mConnectedThread.cancel(); mConnectedThread = null; } mBluetoothAdapter.cancelDiscovery(); return super.stopService(name); } /*private synchronized void connected(BluetoothSocket mmSocket){ if (mConnectThread != null){ mConnectThread.cancel(); mConnectThread = null; } if (mConnectedThread != null){ mConnectedThread.cancel(); mConnectedThread = null; } mConnectedThread = new ConnectedBtThread(mmSocket); mConnectedThread.start(); setState(STATE_CONNECTED); }*/ private class ConnectBtThread extends Thread{ private final BluetoothSocket mSocket; private final BluetoothDevice mDevice; public ConnectBtThread(BluetoothDevice device){ mDevice = device; BluetoothSocket socket = null; try { socket = device.createInsecureRfcommSocketToServiceRecord(UUID.fromString(B_UUID)); } catch (IOException e) { e.printStackTrace(); } mSocket = socket; } @Override public void run() { mBluetoothAdapter.cancelDiscovery(); try { mSocket.connect(); Log.d("service","connect thread run method (connected)"); SharedPreferences pre = getSharedPreferences("BT_NAME",0); pre.edit().putString("bluetooth_connected",mDevice.getName()).apply(); } catch (IOException e) { try { mSocket.close(); Log.d("service","connect thread run method ( close function)"); } catch (IOException e1) { e1.printStackTrace(); } e.printStackTrace(); } //connected(mSocket); mConnectedThread = new ConnectedBtThread(mSocket); mConnectedThread.start(); } public void cancel(){ try { mSocket.close(); Log.d("service","connect thread cancel method"); } catch (IOException e) { e.printStackTrace(); } } } private class ConnectedBtThread extends Thread{ private final BluetoothSocket cSocket; private final InputStream inS; private final OutputStream outS; private byte[] buffer; public ConnectedBtThread(BluetoothSocket socket){ cSocket = socket; InputStream tmpIn = null; OutputStream tmpOut = null; try { tmpIn = socket.getInputStream(); } catch (IOException e) { e.printStackTrace(); } try { tmpOut = socket.getOutputStream(); } catch (IOException e) { e.printStackTrace(); } inS = tmpIn; outS = tmpOut; } @Override public void run() { buffer = new byte[1024]; int mByte; try { mByte= inS.read(buffer); } catch (IOException e) { e.printStackTrace(); } Log.d("service","connected thread run method"); } public void write(byte[] buff){ try { outS.write(buff); } catch (IOException e) { e.printStackTrace(); } } private void cancel(){ try { cSocket.close(); Log.d("service","connected thread cancel method"); } catch (IOException e) { e.printStackTrace(); } } } @Override public void onDestroy() { this.stop(); super.onDestroy(); }不是数组。在

storeArray[storename]

您只需为storeArray[storename] = response.data.bookInfo[i];分配一个不是数组的值。首先需要创建一个数组，然后将该元素放入其中。

storeArray[storename]

在下一次迭代中，您将拥有一个包含一个元素的数组，并且可以使用storeArray[storename] = [ response.data.bookInfo[i] ];。

Answer 2

push是Array本身的函数。所以：storeArray.push(...)

Javascript推送不是一个功能

2 个答案: