Max Sandoval's questions

I am analyzing information within a Google Sheet through Google App Script, through the total active range of the Google Sheet I obtain a javascript object of multidimensional type and I transform it into a JSON object with the function JSON.stringify(miObjetoMultidimensional).

I get an object that in turn is full of empty values, I already tried multiple ways to remove them from my object because I don't need them but I can't succeed.

I understand that Google AppScript runs on top of Rhino so I can't run arrow functions available in ES6.

This is a part of the object obtained in the output of the function.

[  
 [  
      "asm-tree.jar",
      "",
      "",
      "commons-beanutils.jar",
      "",
      "",
      "commons-collections.jar",
      "",
      "",
      "util-java.jar",
      "",
      "",
      "bcprov-jdk14-1.38.jar",
      "",
      "",
      ""
   ],
   [  
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      ""
   ],
   [  
      "\nDependencies",
      "",
      "",
      "\nDependencies",
      "",
      "",
      "\nDependencies",
      "",
      "",
      "\nDependencies",
      "",
      "",
      "\nDependencies",
      "",
      "",
      "\nDependencies"
   ],
   [  
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      "",
      ""
   ]
]

I tried passing a function to validate the data inside it JSON.stringify()but the fields kept appearing empty.

I add my current function.

function listValues() {
  var activeSheet = SpreadsheetApp.getActiveSheet();
  var dataRange = activeSheet.getDataRange();
  var data = dataRange.getValues();

  var json = JSON.stringify(data,function(key, value) {
    if (value === '') { 
      return null; 
    } 
    return value; 
  });

  SpreadsheetApp.getUi().alert(json);

}

I am making a View Model in which I plan to receive a JSONObject through Web Services, the issue is that I need to receive an object that is a list of data lists, I have an idea of ​​how to represent this, creating a variable.

private Map<Integer,Map<Integer,Map>> MiListaDeListas;

But while researching I came across the doubt of HashMap , I know that one is an implementation of the other, but I really couldn't understand the concept between them.

What is the difference and in what cases is it better to use one of the other.

I make an Application where I need to obtain the remaining time for the day of an event, using the class CountDownTimerI managed to obtain a counter of days, hours and dates but I can't think of how to obtain the remaining time.

For this I have two dates established by means of two Dateand I need to know the time remaining between them, for the date of the event I have the format:

Date(int year, int month, int day, int hour, int minute, int second);

And for the current time I just generate a new date

Date date = new Date();

How can I get the remaining time in days, hours, minutes and seconds.

My code where I only have the counter with the current time until the event:

First declare the variables:

private TextView countDown;
private CountDownTimer countDownTimer;
private long initialTime =
            DateUtils.DAY_IN_MILLIS * 110 +
            DateUtils.HOUR_IN_MILLIS * 9 +
            DateUtils.MINUTE_IN_MILLIS * 3 +
            DateUtils.SECOND_IN_MILLIS * 42;

and then handle it in the CountDownTimer:

       countDownTimer = new CountDownTimer(initialTime, 1000) {
            StringBuilder time = new StringBuilder();

            @Override
            public void onTick(long millisUntilFinished) {
                time.setLength(0);
                // Use days if appropriate
                if(millisUntilFinished > DateUtils.DAY_IN_MILLIS) {
                    long count = millisUntilFinished / DateUtils.DAY_IN_MILLIS;
                    if(count > 1)
                        time.append(count).append(" Dias ");
                    else
                        time.append(count).append(" Dia ");

                    millisUntilFinished %= DateUtils.DAY_IN_MILLIS;
                }

                time.append(DateUtils.formatElapsedTime(Math.round(millisUntilFinished / 1000d)));
                countDown.setText(time.toString());
            }

            @Override
            public void onFinish() {
                countDown.setText(DateUtils.formatElapsedTime(0));
                countDown.setText("Dia del evento");
            }


        }.start();

I am developing an application for Google App Engine with the Intellij IDEA IDE , when starting the new project this IDE allows the creation of an App Engine application with the default structure.

At the end of the creation, it does not have the characteristic pom.xml of Maven projects and I need to do version control for the tools that I will use in my project.

The question is:

How can I add it?

I'm trying to deploy the Google App Engine sample app inside my own project that I create in the Google Developer Console, already add the project ID and in theory it should work.

But the console to display the Deployment in IntellijIDEA returns this information.

Beginning interaction for module default...

Password for [email protected]: java.lang.RuntimeException: Bad authentication response: 404 Not Found Unable to update app: Bad authentication response: 404 Not Found Please see the logs [/tmp/appcfg6920280188625618051.log] for further information . Failed to deploy 'helloworld:war exploded': Process terminated with exit code 1

I've already reviewed the documentation and it's practically the only thing I have to change to make it work without problems.

I am making an application where I enter the user's code through a manual scanner, I need to fire an event just when it EditTextreceives the barcode data.

Deactivate the option to receive data through the keyboard so that it is not displayed.

This is my java code .

edtEmployeeID.setOnEditorActionListener(new EditText.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_DONE) {
                    Toast.makeText(getApplicationContext(), edtEmployeeID.getText(), Toast.LENGTH_SHORT).show();
                    return true;
                }
                return false;
            }
        });

Although I have not entered it using the scanner.

in xml

<EditText
            android:id="@+id/edtEmployeeID"
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:singleLine="true"
            android:hint="@string/code"
            android:textColorHint="@color/colorSecundaryText"
            android:textSize="25sp"
            android:textAlignment="center"
            android:textColor="@color/colorPrimaryText"
            android:cursorVisible="false"
            android:focusable="true"/>

What happens is that I have a jsp view from which I fill out a form, send the data through the POST method to my controller and once the instructions are finished, I return to the main view of my site. However, the methods contained in my GET controller for the main view did not start, returning it completely clean with no information, this usingreturn"vista.jsp";

Now, using return:"redirect:vista.jsp"my methods they go smoothly returning the information, I managed to solve my error but I want to understand its difference well and that I am somewhat confused.