Tutorial by Examples: ces

A processing instruction is used to directly pass on some information or instruction to the application via the parser. <?my-application some instructions ?> The token after the initial question mark (here my-application) is called the target and identifies the application at which the ins...

Matrices You must always use the amsmath package if you are going to use the following commands. There are four main types of matrix, as shown in the code below: \begin{matrix} a & b \\ c & d \end{matrix} \quad \begin{pmatrix} a & b \\ c & d \end{pmatrix} ...

Data races occur when a piece of memory is updated by one party while another tries to read or update it simultaneously (without synchronization between the two). Let's look at the classic example of a data race using a shared counter. use std::cell::UnsafeCell; use std::sync::Arc; use std::threa...

We can avoid providing direct access to resource intensive constructors, like for databases. public class DbConnection { private static final int MAX_CONNS = 100; private static int totalConnections = 0; private static Set<DbConnection> availableConnections = new HashSet<DbConnectio...

Here are a simple example of some common tasks related to developing an API, differentiating between the HTTP Method of the request, accessing query string values and accessing the request body. Resources http.Handler interface http.ResponseWriter http.Request Available Method and Status cons...

In this example you will learn how to use Microsoft Cognitive Services with Xamarin iOS mobile application. We will use Computer Vision API to detect what is in the picture. Once you create Xamarin.iOS project please add below NuGet package to the project: https://www.nuget.org/packages/Microsoft....

The BluetoothLE API was introduced in API 18. However, the way of scanning devices has changed in API 21. The searching of devices must start with defining the service UUID that is to be scanned (either officailly adopted 16-bit UUID's or proprietary ones). This example illustrates, how to make an A...

(Access Code)[https://github.com/vDoers/vDoersCameraAccess]

All UI elements created and reside in the main thread of a program. Accessing these from another thread is forbidden by the .net framework runtime. Basically it is because all UI elements are thread sensitive resources and accessing a resource in a multi-threaded environment requires to be thread-sa...

Process manager is generally used in production to deploy a nodejs app. The main functions of a process manager are restarting the server if it crashes, checking resource consumption, improving runtime performance, monitoring etc. Some of the popular process managers made by the node community are ...

Instalation Dependencies Hue installation process details are not available for most operating systems, so depending on the OS, there might be variations on the dependencies you need to install prior to executing the install script provided in the installation package: CentOS sudo yum install ant...

Example Table There are several ways to inject your data into DataTables. Serverside Processing is just one method. In this manner, DataTables has a pre-configured endpoint to retrieve data from, and that endpoint is responsible for accepting all paging/filtering/sorting requests that DataTables ap...

The parent axis contains only the parent of a node. The following expression selects the html element by taking a detour over the body element: /child::html/child::body/parent::html .. is a shortcut for parent::node() The ancestor and ancestor-or-self axes traverse all ancestors of a node. The ...

Installation npm install forever -g cd /node/project/directory Usages forever start app.js

Sometimes we have requirement of parsing pages, but doing so requires you to be an authorised user. Here is an example which shows you how to do in oracle sign in. import sys import requests import json from bs4 import BeautifulSoup def mprint(x): sys.stdout.write(x) print re...

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...

Eclipse debugging starts with what is referred to as Agents. The JVM, which runs the complied .class sources has a feature that allows externally libraries (written in either Java or C++) to be injected into the JVM, just about runtime. These external libraries are referred to as Agents and they ha...

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...

When the command-line syntax for an application is simple, it is reasonable to do the command argument processing entirely in custom code. In this example, we will present a series of simple case studies. In each case, the code will produce error messages if the arguments are unacceptable, and the...

A simple example of Vehicle hierarchy can be taken for single table inheritance strategy. Abstract Vehicle class: package com.thejavageek.jpa.entities; import javax.persistence.DiscriminatorColumn; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persi...