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

Difference between method and function in Scala

Difference between method and function in Scala

I read Scala Functions (part of Another tour of Scala). In that post he stated: Methods and functions are not the same thingBut he didn't explain anything about it. What was he trying to say? 1:Jim has got this pretty much covered in hi

What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]

What is the Java string pool and how is “s” different from new String(“s”)? [duplicate]

This question already has an answer here: What is the difference between “text” and new String(“text”)? 10 answers What is mean

How can I develop for iPhone using a Windows development machine?

How can I develop for iPhone using a Windows development machine?

Is there any way to tinker with the iPhone SDK on a Windows machine? Are there plans for an iPhone SDK version for Windows?The only other way I can think of doing this is to run a Mac VM image on a VMWare server running on Windows, although

Using i and j as variables in Matlab

Using i and j as variables in Matlab

i and j are very popular variable names (see e.g., this question and this one). For example, in loops:for i=1:10, % do something...endAs indices into matrix:mat( i, j ) = 4;Why shouldn't they be used as variable names in Matlab? 1:Be

How do I use reflection to call a generic method?

How do I use reflection to call a generic method?

What's the best way to call a generic method when the type parameter isn't known at compile time, but instead is obtained dynamically at runtime?Consider the following sample code - inside the Example() method, what's the most concise way t

What are the rules about using an underscore in a C++ identifier?

What are the rules about using an underscore in a C++ identifier?

It's common in C++ to name member variables with some kind of prefix to denote the fact that they're member variables, rather than local variables or parameters. If you've come from an MFC background, you'll probably use m_foo. I've also se

Dispatch.Invoke( new Action…) with a parameter

Dispatch.Invoke( new Action…) with a parameter

Previously I hadDispatcher.Invoke(new Action(() => colorManager.Update()));to update display to WPF from another thread. Due to design, I had to alter the program, and I must pass ColorImageFrame parameter into my ColorStreamManager.Update(

What are the benefits/consequences of compiling an armv7 only architecture?

What are the benefits/consequences of compiling an armv7 only architecture?

In compiling iPhone apps, there is a setting for "Optimized" architecture (armv7 only) vs a standard armv6/armv7 architecture.What are the benefits/consequences of compiling an armv7 only architecture? 1:A smaller executable is a faster

Gradle build with Java 8

Gradle build with Java 8

I'm trying to build Java 8 project with Gradle 1.6, but I'm stuck on this error:Execution failed for task ':ejb:compileJava'invalid target release: 1.8JAVA_HOME is set as "D:\Program Files\Java\jdk1.8.0", and build.gradle contains these lin

opengl glutmainloop()

opengl glutmainloop()

i just started off using OpenGL and it seems it is not easy to understand the working of the glutMainLoop() what really happens there? Does it stay there doing nothing till any of the function calls responds? 1:It calls your display call

How to print an error message to standard error?

How to print an error message to standard error?

In UNIX, I'm supposed to write a Java file that will print "Exit 1" to the standard error, and then exit with a status of 1.Here is my approach..System.err.println("EXIT 1");System.exit(1);Is this what I'm supposed to do?If so, how am I sup

NetFx40_LegacySecurityPolicy in design-time mode

NetFx40_LegacySecurityPolicy in design-time mode

Is there any way to make legacy design-time code execute with NetFx40_LegacySecurityPolicy switched on?More specificaly, is there any way to make DevExpress 8.2 winforms designer work in VisualStudio 2010?I got errors due to this issue and

Catch SIGINT in bash, handle AND ignore

Catch SIGINT in bash, handle AND ignore

Is it possible in bash to intercept a SIGINT, do something, and then ignore it (keep bash running).I know that I can ignore the SIGINT withtrap '' SIGINTAnd I can also do something on the sigint withtrap handler SIGINTBut that will still st

Spaces cause split in path with PowerShell

Spaces cause split in path with PowerShell

I'm having an issue with powershell when invoking an exe at a path containing spaces.PS C:\Windows Services> invoke-expression "C:\Windows Services\MyService.exe"The term 'C:\Windows' is not recognized as the name of a cmdlet, function, scr

error Please #define _AFXDLL or do not use /MD[d] occurs even after making changes in Project Proper

error Please #define _AFXDLL or do not use /MD[d] occurs even after making changes in Project Proper

I am working on Win32 project in Visual Studio 2011. It is generating MFC error when I includes afx.h or afxwin.h.To resolve this, I have made the following changes in the Project Properties tab :1) Use of MFC : Use MFC in a shared DLL2) C+

Xcode 5 throws “Library not loaded” error when adding a test target

Xcode 5 throws “Library not loaded” error when adding a test target

I've tried adding a test target on Xcode 5 using the Add Target -> Add Cocoa Touch Unit Testing Bundle. However, when I run the test, I get the following error: 2013-09-24 10:43:14.446 Stack Exchange[48895:c07] Error loading /Users/arieli

Root directory in package.json

Root directory in package.json

My question concerns an existing library that I wish to publish as an NPM module. The library is already in use, and currently required via the local file system.How can I specify the root directory of my module's files?If I have a structur

in pycharm, how to go back to last location

in pycharm, how to go back to last location

i've tried these answers, but nothing happened:Keyboard shortcut for Jump to Previous View Location (Navigate back/forward) in IntelliJ Ideafor example:i'm navigating to a function body,put the cursor on a function call,click F12 ("go to de

What command opens Ruby's REPL?

What command opens Ruby's REPL?

What command opens Ruby's REPL?In Python, you simply open python without any arguments. 1:There are several REPLs for Ruby.The standard library ships with a REPL called IRb (for Interactive Ruby), which installs a program named irb, but

Bluetooth device not discoverable

Bluetooth device not discoverable

I'd like to establish a Bluetooth communication between an Android phone and a remote device. The class of the remote device is a basic one just a simple Bluetooth adapter. When I use the Bluetooth scan devices function, the phone recognize

Running a .NET application from a file share without code signing

Running a .NET application from a file share without code signing

The .NET security model throws security errors whenever a .NET exe is run from a file share. The error does not appear when ran from a local drive. Does anyone know of a way around this without requiring the code to be signed? 1:Using Ca

opening a shell and interacting with its I/O in java

opening a shell and interacting with its I/O in java

I am trying to open a shell (xterm) and interact with it (write commands and read the shell's output)Here is a sample of code which won't work:public static void main(String[] args) throws IOException { Process pr = new ProcessBuilder("x

Compiling a Linux program for ARM architecture - running on a host OS

Compiling a Linux program for ARM architecture - running on a host OS

I have a ARM Coretex-A8 development board from Freescale (i.MX53) running Linux Ubuntu. It boots up just fine and I can access the system with mouse/keyboard/terminal.To get started I would like to make an application running on the board i

What are the Differences between C++ Templates and Java/C# Generics and what are the limits? [closed

What are the Differences between C++ Templates and Java/C# Generics and what are the limits? [closed

I read an interesting Article/Thread/Discussion from here and i got following questions:What are the limitations of Java/C# generics?What is possible with C++ Templates that is impossible with Java/C# generics?Edit 1 More recommended questi