pandas dataframe, copy by value

pandas dataframe, copy by value

I noticed a bug in my program and the reason it is happening is because it seems that pandas is copying by reference a pandas dataframe instead of by value. I know immutable objects will always be passed by reference but pandas dataframe is

Create ArrayList from array

Create ArrayList from array

I have an array that is initialized like:Element[] array = {new Element(1), new Element(2), new Element(3)};I would like to convert this array into an object of the ArrayList class.ArrayList arraylist = ???; 1:new ArrayList<>(Ar

Why split the  tag when writing it with document.write()?

Why split the tag when writing it with document.write()?

Why do some sites (or advertisers that give clients javascript code) employ a technique of splitting the tags up within document.write() calls?I noticed that Amazon does this as well, for example:

Get selected element's outer HTML

Get selected element's outer HTML

I'm trying to get the HTML of a selected object with jQuery. I am aware of the .html() function; the issue is that I need the HTML including the selected object (a table row in this case, where .html() only returns the cells inside the row

Ruby on Rails 4 - simple_form multiple select input

Ruby on Rails 4 - simple_form multiple select input

I have a simple_form input field that looks like this:When I leave multiple: true off, the form submits the chosen value for the parameter :particular_users and I can see the value when debugging using "raise params.inspect". However when I

How can I use powershell's read-host function to accept a password for an external service?

How can I use powershell's read-host function to accept a password for an external service?

I have a script I'm writing that makes a connection to a SOAP service. After the connection is made, I need to pass in a the username/pass with every command I send. The problem I have is that when I use read-host to do this, my password is

Is the following move constructor code safe?

Is the following move constructor code safe?

This is the move constructor of class X:X::X(X&& rhs) : base1(std::move(rhs)) , base2(std::move(rhs)) , mbr1(std::move(rhs.mbr1)) , mbr2(std::move(rhs.mbr2)){ }These are the things I'm wary about:We're moving from rhs twice and

Mockito - Invalid use of argument matchers

Mockito - Invalid use of argument matchers

I have Junit test that is testing jms message sending. I am using Spring jmsTemplate to to do this. Here I as in the following code I want to check whether the JMS template has called send message regardless what is it in the values of actu

What does “where” mean in a C# class declaration?

What does “where” mean in a C# class declaration?

I tried to google this, but all I could find was documents on ordinary class declarations.public class DataContextWrapper : IDataContextWrapper where T : DataContext, new(){}I see that the class implements IDataContextWrapper, inherits from

jquery select first child with class of a parent with class

jquery select first child with class of a parent with class

How can i select only the first child of a particular class of a parent with a particular class for the purposes of clone()? SELECT THIS DIV NOT THIS DIV I am trying like this:var form1 = $(this) .parents('.sector_or

response.writeHead and response.end in NodeJs

response.writeHead and response.end in NodeJs

var https = require('https');var fs = require('fs');var options = { key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'), cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')};https.createServer(options, function (req, res) {

output the command line called by subprocess?

output the command line called by subprocess?

I'm using the subprocess.Popen call, and in another question I found out that I had been misunderstanding how Python was generating arguments for the command line. My QuestionIs there a way to find out what the actual command line was? Ex

Meaning of Three dot (…) in PHP

Meaning of Three dot (…) in PHP

What is the meaning of Three dot (...) in PHP ?While I am installing Magento 2 in my Sever I got an error. Investigate the code and found that there is a Three dot (...), which is producing the error. I mentioned the code belowreturn new $t

How to get value in the session in jQuery

How to get value in the session in jQuery

I'm a beginner in jQuery.I want to set the values in an HTML page and I have to get them in another HTML page. Here is the piece of code I am trying now:To set the value in session:$.session.set(userName, $("#uname").val());To get the valu

Converting NSString to Currency - The Complete Story

Converting NSString to Currency - The Complete Story

After over a day of poking around with this problem I will see if I can get some help. This question has been more or less asked before, but it seems no one is giving a full answer so hopefully we can get it now.Using a UILabel and a UIText

get pcm data from mp3 file in android

get pcm data from mp3 file in android

My question is simple. How do I get PCM data from the mp3 file?Now I found only ne way to get PCM bytes from the song, I loaded and played mp3 by MediaPlayer and tried listen to the change of waves by Visualizer.OnDataCaptureListener . This

Android Bind Spinner to Class

Android Bind Spinner to Class

I'm having some trouble with the Spinner widget. Given the following code: ArrayList people= new ArrayList(); Person = null; for(int i = 0; i!= 10; i++) { p = new Person(); s.setID(i); s.setName("Name " + i);

Passing rvalue reference to const lvalue reference paremeter

Passing rvalue reference to const lvalue reference paremeter

I am trying to understand C++11 rvalue references and how to use them for optimal performance in my code.Let's say we have a class A that has a member pointer to a large amount of dynamically allocated data.Furthermore, a method foo(const A

How to measure true FPS performance of OpenGL ES?

How to measure true FPS performance of OpenGL ES?

I realized that these are two different things:Drawing, and getting it on screen.So while you may draw in every single call from CADisplayLink at a rate of 60 FPS, if your drawing operations take slightly longer than 1/60 seconds you end up

Why can't I return arbitrary array of string?

Why can't I return arbitrary array of string?

The compiler allows me to do the following:procedure MyProc(const ADynData: array of string);orprocedure MyProc(const ADynData: TStringDynArray);and pass arbitrary data like so:MyProc(['Data1', 'Data2']);However, won't allowfunction MyFunc:

Animate lines in a line graph with D3.js

Animate lines in a line graph with D3.js

I have my line graph, with 2 lines.Data to draw my line graph is pulled from a .csv file.Can anyone explain how I could start off with an empty graph, and when I click a button, my lines animate across the graph?Thanks in advance!! var b

Get keyboard language or detect user input language in Android

Get keyboard language or detect user input language in Android

Problem DescriptionI'm trying to detect current selected language of the keyboard. For that purpose I use following code:Code/* Return the handle to a system-level service by name. The class of the returned * object varies by the requested

Passing/Accessing props in stateless child component

Passing/Accessing props in stateless child component

I know you can pass all a react components props to it's child component like this:const ParentComponent = () => ( Parent Component )But how do you then retrieve those props if the child component is stateless? I know if it is