How to insert into MongoDB array [closed] - java

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This is my collection:
What Im trying to do is to insert a new "departamento" using JAVA, but when I do it, it is created as a new object.
And this is what Im doing in java:
Any idea? Thank you.

Try this, there is a function called update that has two parameters first the query of the element you want to update, send some configuration to update using the operator $push
db.departamentos.update({"titulo": "nombre"}, { $push: { "departamento": {"ubicacion": "Barcelona", "nombre": "nombre2"}}})
Take a look from MongoShell

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Python3 project; seeing a construct ArrayOfComplexType; how does this happen? [closed]

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I am debugging a complicated Python 3 program. Deep in one of the system libraries, I put in a print() statement, which reported:
target_setting: (ComplexType){
Type = None
Details =
(ArrayOfComplexTypeDetail){
ComplexTypeDetail[] = <empty>
}
}
I don't see how this could have been produced inside of Python; callout may have been to Java.
Am I wrong about this? Can you do this inside Python3? What is an example, if so?

Firebase realtime data base android java [closed]

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Can someone answer my question: Why i can't create child in root like this:
mDatabase.child("teams").child(uniqueIDstr).child("members").child(currentUser.getEmail()).setValue("XD");
because something like this is working properly:
mDatabase.child("users").child(currentUser.getUid()).child("groups").child(uniqueIDstr).setValue("group");
The problem is in this call child(currentUser.getEmail()). An email address always contains at least one . and that character is not allowed in keys in the Firebase Realtime Database. You should actually be getting an error message when you run that code that pretty explicitly tells you this.
The common solution is to "encode" the email address, for example by remove the .s from it or by changing each . to a ,. The latter is a neat trick, since , is not allowed in email addresses while it is allowed in Realtime Database keys.

btoa function how to use in Javascript [closed]

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I want to automated below code using Selenium and Java, but whenever I am trying to use window.btoa its giving me syntax error can someone help me how to achieve this in Java with selenium.
please find below code to be automated
var obj={Name:"Automation"}
JSON.stringnify{obj}
window.encodeURIComponent{JSON.strignify(obj)};
btoa(window.encodeURIComponent(JSON.strignify(obj)))
There is spelling mistake and some brackets you used I changed to correct format.
var obj={Name:"Automation"}
JSON.stringify(obj)
window.encodeURIComponent(JSON.stringify(obj));
btoa(window.encodeURIComponent(JSON.stringify(obj)))
Can you try this ?

can anybody tell or recommend a video series for java threads and help me out to fix an error? [closed]

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Code fragment
I followed a video series of Derek Banas about java threads but applying the same code on my compiler it gave me an error. I dont know why.please help me out.
Another code fragment
note: I have already defined "getTheMail" with an integer.
This is not a threading issue. You should instantiate GetTheMail class without giving any constructor parameters since it is not expecting any.. like this : new GetTheMail(); I encourage you to read this article for further understanding : https://www.javaworld.com/article/2076204/core-java/understanding-constructors.html

How to minimize multiple if statements? [closed]

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I'm doing a code cleanup and I want your HELP
The code creates units and place them in a unitPositionHashmap. Furthermore it reduces production value according to unit type.
I'm looking for a way to reduce the amount of code and smarter way to structure this method, so I avoide almost dublicated code.
The code
Create a method having one if block and use parameters to fill in the variable values (p, GameConstants value (like ARCHER), ProductionAmount condition value (like 10). You'll have one if left in the makeUnit method, while having only one if in the new method.

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