Tutorial by Examples: ti

This is the simplest way to connect. First, the driver has to be registered with java.sql.DriverManager so that it knows which class to use. This is done by loading the driver class, typically with java.lang.Class.forname(<driver class name>). /** * Connect to a PostgreSQL database. *...

Instead of specifying connection parameters like user and password (see a complete list here) in the URL or a separate parameters, you can pack them into a java.util.Properties object: /** * Connect to a PostgreSQL database. * @param url the JDBC URL to connect to. Must start with "jdbc:...

It is common to use javax.sql.DataSource with JNDI in application server containers, where you register a data source under a name and look it up whenever you need a connection. This is code that demonstrates how data sources work: /** * Create a data source with connection pool for PostgreSQL c...

CDI is a Java EE specification. It specifies how things should be done, and which features must be provided, but it isn't actually a specific library or set of code. In order to use CDI, you will need to use a CDI implementation. The reference implementation of the CDI spec is a set of libraries kn...

You can install Solr in any system where a suitable Java Runtime Environment (JRE) is available, as detailed below. Currently this includes Linux, OS X, and Microsoft Windows. You will need the Java Runtime Environment (JRE) version 1.8 or higher. At a command line, check your Java version like thi...

Given the following class: public class FinalizableObject { public FinalizableObject() { Console.WriteLine("Instance initialized"); } ~FinalizableObject() { Console.WriteLine("Instance finalized"); } } A program that create...

What if two (or several) otherwise dead objects reference one another? This is shown in the example below, supposing that OtherObject is a public property of FinalizableObject: var obj1 = new FinalizableObject1(); var obj2 = new FinalizableObject2(); obj1.OtherObject = obj2; obj2.OtherObject = ...

As Dispose() and finalizers are aimed to different purposes, a class managing external memory-heavy resources should implement both of them. The consequence is writing the class so that it handles well two possible scenarios: When only the finalizer is invoked When Dispose() is invoked first and...

The common case for injecting dependencies into a class is with constructor injection. This involves annotating a constructor on the class with @Inject. The CDI manager will look for a constructor with the @Inject annotation when creating an instance of the class. When it finds an @Inject-annotated ...

A MultiTrigger is similar to a standard Trigger in that it only applies to properties within the same control. The difference is that a MultiTrigger has multiple conditions which must be satisfied before the trigger will operate. Conditions are defined using the <Condition> tag. <TextBlock...

The same example from above can also be done using what is known as field injection. Instead of annotating the constructor with @Inject, we annotate the fields we wish to have injected public class Spaceship { @Inject private PropulsionSystem propulsionSystem; @Inject private ...

Example of how to calculate the output shape and overcome the difficulties of using tf.nn.conv2d_transpose with unknown batch size (when input.get_shape() is (?, H, W, C) or (?, C, H, W)). def upconvolution (input, output_channel_size, filter_size_h, filter_size_w, stride_h, str...

@ApplicationScoped public class ApplicationScopedClass { //This class gets constructed once for the entire life of the application, and is shared among all CDI-managed classes throughout the life of the application. @Inject public ApplicationScopedClass(SomeDependency someDependenc...

The following code, inserted in your wp-config.php file, will log all errors, notices, and warnings to a file called debug.log in the wp-content directory. It will also hide the errors so they do not interrupt page generation. // Enable WP_DEBUG mode define( 'WP_DEBUG', true ); // Enable Debug...

Add the rx-android dependency as well as a current version of rx-java to the build.gradle. Because RxAndroid releases are few and far between, it is recommended you also explicitly depend on RxJava's latest version for bug fixes and new features. Rx1 compile 'io.reactivex:rxandroid:1.2.1' co...

:wqall Exiting multiple files with saving contents :qall! Exiting multiple files without saving contents

Once you have installed Visual Studio from https://www.visualstudio.com/downloads/, start a new project. Select 'Windows Forms Application' from Visual Basic Tab. You can rename it here if you need to. Once you click 'OK', you will see this window: Click on the 'Toolbo...

Dialog dlg; DialogGroup dGrp; DialogField dfCustomer; dlg = new Dialog("Simple Dialog"); dGrp = dlg.addGroup("A Group"); dfCustomer = dlg.addField(extendedTypeStr(CustAccount)); if (dlg.run()) { info(dfCustomer.value()); } Because CustAccount is linked to the ...

Detailed instructions on getting DotNetNuke set up or installed.

// db.js const mysql = require('mysql'); const pool = mysql.createPool({ connectionLimit : 10, host : 'example.org', user : 'bob', password : 'secret', database : 'my_db' }); module.export = { getConnection: (callback) => { retu...