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Pandas provides an effective way to apply a function to every element of a Series and get a new Series. Let us assume we have the following Series: >>> import pandas as pd >>> s = pd.Series([3, 7, 5, 8, 9, 1, 0, 4]) >>> s 0 3 1 7 2 5 3 8 4 9 5 1 ...

$rootScope.$on listeners will remain in memory if you navigate to another controller. This will create a memory leak if the controller falls out of scope. Don't angular.module('app').controller('badExampleController', badExample); badExample.$inject = ['$scope', '$rootScope']; function badExam...

Tomcat's Host Manager application by default is located at http://localhost:8080/host-manager, but is not accessible until a user is given permission in the conf/tomcat-users.xml file. The file needs to have: A manager-gui role A user with this role For example: <tomcat-users> ......

Once you have access to the host-manager, the GUI will let you add a virtual host. Note: In Tomcat 7 and 8, adding a virtual host via the GUI does not write the vhost to config files. You will need to manually edit the server.xml file to have the vhost available after a restart. See http://tomc...

2.04 Bash treats some paths as special and can do some network communication by writing to /dev/{udp|tcp}/host/port. Bash cannot setup a listening server, but can initiate a connection, and for TCP can read the results at least. For example, to send a simple web request one could do: exec 3</...

A child theme is identified by WordPress when there is a directory (for example child-theme) inside /wp-content/themes/ with the following files: style.css This file must start with a comment template like this: /* Theme Name: Example Child Author: Me Author URI: https://example.com/ ...

You cannot access any GUI components from the BackgroudWorker. For example if you try to do something like this Private Sub BackgroundWorker1_DoWork(sender As Object, e As DoWorkEventArgs) TextBox1.Text = "Done" End Sub you will receive a runtime error saying that "Cross-thr...

The entire idea with dependency injection is that a class does not instantiate its dependencies but requests them (through constructor or property). Using Castle the way for specifying the way to resolve a dependency is by using the DependsOn: public class Foo : IFoo { public Foo(IBar bar, st...

<PropertyGroup> <LinkedSolution>LinkedSolution.sln</LinkedSolution> <BuildType>Build</BuildType> <!-- Build / Rebuild --> <BuildArchitecture>x86</BuildArchitecture> <!-- x86 / 64 --> <BuildConfiguration>Debug</BuildCo...

// 1. Instantiate the player. player = ExoPlayer.Factory.newInstance(RENDERER_COUNT); // 2. Construct renderers. MediaCodecVideoTrackRenderer videoRenderer = ... MediaCodecAudioTrackRenderer audioRenderer = ... // 3. Inject the renderers through prepare. player.prepare(videoRenderer, audioRend...

public class ReplaceFont { public static void changeDefaultFont(Context context, String oldFont, String assetsFont) { Typeface typeface = Typeface.createFromAsset(context.getAssets(), assetsFont); replaceFont(oldFont, typeface); } private static void replaceFont(String oldFont, Type...

This example creates a MediaSession object when a Service is started. The MediaSession object is released when the Service gets destroyed: public final class MyService extends Service { private static MediaSession s_mediaSession; @Override public void onCreate() { // Insta...

First create a BroadcastReceiver class to handle the incoming Location updates: public class LocationReceiver extends BroadcastReceiver implements Constants { @Override public void onReceive(Context context, Intent intent) { if (LocationResult.hasResult(intent)) { ...

A repository pattern can be used to encapsulate data storage specific code in designated components. The part of your application, that needs the data will only work with the repositories. You will want to create a repository for each combination of item you store and your database technology. Read...

We will take vehicle hierarchy example as depicted below. Vehicle.java package com.thejavageek.jpa.entities; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Inheritance...

In some very specific scenarios we would feel the need to perform a specific action for each flag of the source enumeration. We can write a simple Generic extension method to realize this task. <DebuggerStepThrough> <Extension> <EditorBrowsable(EditorBrowsableState.Always)> Pu...

The next example is intended to count the amount of flags in the specified flag combination. The example is provided as a extension method: <DebuggerStepThrough> <Extension> <EditorBrowsable(EditorBrowsableState.Always)> Public Function CountFlags(ByVal sender As [Enum]) As In...

There are a number of guidelines to follow when creating and using header files in a C project: Idemopotence If a header file is included multiple times in a translation unit (TU), it should not break builds. Self-containment If you need the facilities declared in a header file, you sh...

Modern headers should be self-contained, which means that a program that needs to use the facilities defined by header.h can include that header (#include "header.h") and not worry about whether other headers need to be included first. Recommendation: Header files should be self-contained...

The C standard says that there is very little difference between the #include <header.h> and #include "header.h" notations. [#include <header.h>] searches a sequence of implementation-defined places for a header identified uniquely by the specified sequence between the &l...