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

StreamCorruptedException: invalid type code: AC

StreamCorruptedException: invalid type code: AC

My problem is when it tries to read the object the second time, it throws the exception: java.io.StreamCorruptedException: invalid type code: AC at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1356) at java.io.ObjectIn

Displaying NSMutableAttributedString on iOS 8

Displaying NSMutableAttributedString on iOS 8

Seems on iOS 8.0 (12A365) NSMutableAttributedString sometimes will not be displayed correctly. The problem obviously occurs when the range of the attribute does not start at the beginning of the text (and if there is no other attribute star

Chrome dev tools pauses on exceptions in blackboxed script

Chrome dev tools pauses on exceptions in blackboxed script

I have a JavaScript file that I have blackboxed in the Chrome developer tools and I have the debugger set to pause on uncaught exceptions. However, the dev tools continues to pause on uncaught exceptions in the blackboxed JS file (see scre

C++11 lambdas can access my private members. Why?

C++11 lambdas can access my private members. Why?

Consider this piece of code:class shy {private: int dont_touch; // Private memberpublic: static const shy object;};const shy shy::object = []{ shy obj; obj.dont_touch = 42; // Accessing a private member; compiles; WHY? r

CSS - Internet Explorer and the  tag background

CSS - Internet Explorer and the tag background

I have a pretty simple layout which renders fine in both Firefox and Chrome, but Internet Explorer (version 11) seems to be unable to render any kind of background color for the element.I have the element as a child of the element and ne

Javascript array best practice to use [] instead of new array?

Javascript array best practice to use [] instead of new array?

I read at many tutorials that the current best practices to create a new javascript array is to use var arr = [] instead of var arr = new Array()What's the reasoning behind that? 1:It might be because the Array object can be overwritten

Does Content Security Policy block bookmarklets?

Does Content Security Policy block bookmarklets?

Does Mozillas CSP block to execute Javascript from a bookmark by default?Can it be configured to do so? 1:As of 2017, the answer is still a definitive "maybe" - just like when this answer was originally posted in 2011. The specification

Java 8: Class JavaLaunchHelper is implemented in both

Java 8: Class JavaLaunchHelper is implemented in both

I'm trying to launch Cassandra and I'm running into an issue with JavaLaunchHelper being located in two places. I'm running Java 8. Here's the exact error:objc[413]: Class JavaLaunchHelper is implemented in both/Library/Java/JavaVirtualMach

Part of fragment inside ViewPager getting cut off at bottom of screen(Android)

Part of fragment inside ViewPager getting cut off at bottom of screen(Android)

I have defined a basic Coordinator layout for my view: There are multiple tabs in my view pager. I am posting one of my simple fragments:What happens is that the FAB goes out of screen. It's just not the FAB, but

Guice Performance on Android

Guice Performance on Android

As a Java developer I've become accustomed to having dependency injection available in applications. For Android though, I am especially wary of performance. What are the performance implications for using Guice in an Android app? I assu

Why first element is destroyed?

Why first element is destroyed?

I have a piece of code like this:class Data{ public: Data(const std::vector &_data) { my_data = _data; } private: std::vector my_data;};int main(){ std::vector> vec = { std::shared_ptr(

Error in Visual Studio 2015 When Add New WebForm

Error in Visual Studio 2015 When Add New WebForm

When I add new WebForm to my project, I get the following error: Could not load file or assembly 'Microsoft.VisualStudio.JSLS,Version=14.0.0.0 , Culture=neutral , PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies.the system ca

UIButton in Swift is not registering touches

UIButton in Swift is not registering touches

I'm trying to create a UIButton using Swift. It compiles fine and I can see my button in the simulator, but when I click it, nothing happens. This is the code I am using:let settings = UIButton()settings.addTarget(self, action: "touchedSet:

Matplotlib requirements with pip install in virtualenv

Matplotlib requirements with pip install in virtualenv

I have a requirements.txt file like this:numpymatplotlibWhen I try pip install -r requirements.txt inside a new virtualvenv, I get this:REQUIRED DEPENDENCIES numpy: no * You must install numpy 1.1 or later to

why do they use DBMS_STATS.GATHER_TABLE_STATS ? [closed]

why do they use DBMS_STATS.GATHER_TABLE_STATS ? [closed]

I found documents explaining that oracle uses these for performance tuning etc but didn't quite understand that what does it actually do. Can some one explain it to me in simple word with very basic example or something? 1:Most enterpris

How to map RuntimeExceptions in Java streams to “recover” from invalid stream elements

How to map RuntimeExceptions in Java streams to “recover” from invalid stream elements

Imagine I'm building a library, that will receive a Stream of Integers, and all the library code needs to do is return a stream of Strings with the string representation of the number.public Stream convertToString(Stream input) { return in

What is the easiest way in pure Perl to stream from another HTTP resource?

What is the easiest way in pure Perl to stream from another HTTP resource?

What is the easiest way (without opening a shell to curl and reading from stdin) in Perl to stream from another HTTP resource? I'm assuming here that the HTTP resource I'm reading from is a potentially infinite stream (or just really, reall

Can a String[] hold System.Object inside it?

Can a String[] hold System.Object inside it?

Do you feel question is strange? yes what happened also strange. let me explain.I have found a snippet from this Covariance and Contravariance with C# Arraysstring[] strings = new string[1];object[] objects = strings;objects[0] = new object

How to get the time between two TFS Work Item States in SSAS (or any other report)?

How to get the time between two TFS Work Item States in SSAS (or any other report)?

Is there a way in TFS's reports that you can get the amount of time taken for a work item to transition between states?Looking at the data in the Tfs_Warehouse database I can see that there is a record of every revision of a work item, and

Eclipse ADT crash when autocomplete popup

Eclipse ADT crash when autocomplete popup

I am using the eclipse ADT-bundle that Google lets you download directly from their site. I am in Ubuntu 13.10 and is using Oracle Java 7. My problem is that Eclipse crashes (freezes) as soon as the autocomplete popup is shown. It seems to

Google SDTT error: “All values provided for http://www.example.com/ must have the same domain.”

Google SDTT error: “All values provided for http://www.example.com/ must have the same domain.”

When I copy/paste JSON-LD example from Google Documentation (code-snippet below) I get an error in the Structured Data Testing Tool: http://www.your-company-site.com (All values provided for http://www.example.com/ must have the same doma

jQuery UI TypeError: e.widget.extend is not a function

jQuery UI TypeError: e.widget.extend is not a function

I have updated my jQuery files including jQUery UI to use the tooltip feature.But now Javascript is dieing with the following error:TypeError: e.widget.extend is not a functionCan anyone help me? 1:jQuery Ui was included twice (second ti

“requestLayout() improperly called by…” error on Android 4.3

“requestLayout() improperly called by…” error on Android 4.3

I have a simple Custom TextView that sets custom font in its constructor like the code belowpublic class MyTextView extends TextView { @Inject CustomTypeface customTypeface; public MyTextView(Context context, AttributeSet attrs) {

pip install: How to force a specific package version

pip install: How to force a specific package version

I'm trying to install Django 1.4.3, but when I execute pip install, pip keeps installing Django 1.5 version instead 1.4.3sudo pip install -I Django==1.4.3It returns:Downloading/unpacking Django==1.4.3 Running setup.py egg_info for package