Tutorial by Examples: d

@Entity @Table(name="FOO") public class Foo { private UUID fooId; @OneToMany @JoinTable(name="FOO_BAR", joinColumns = @JoinColumn(name="fooId"), inverseJoinColumns = @JoinColumn(name="barId", unique=true)) private ...

@Entity @Table(name="FOO") public class Foo { private UUID fooId; @OneToOne private Bar bar; } @Entity @Table(name="BAR") public class Bar { private UUID barId; //No corresponding mapping to Foo.class } Specifies a one-way relationship b...

TestSchedulers allows you to control time and execution of Observables instead of having to do busy waits, joining threads or anything to manipulate system time. This is VERY important if you want to write unit tests that are predictable, consistent and fast. Because you are manipulating time, the...

Generic redirect to https: # Enable Rewrite engine RewriteEngine on # Check if URL does not contain https RewriteCond %{HTTPS} off [NC] # If condition is true, redirect to https RewriteRule (.*) https://%{SERVER_NAME}/$1 [R=301,L] Generic redirect to http: # Enable Rewrite engine Rewr...

import org.bukkit.event.Listener; import org.bukkit.event.EventHandler; import org.bukkit.event.EventPriority; import org.bukkit.event.player.PlayerLoginEvent; import org.bukkit.event.player.PlayerQuitEvent; public class MyEventListener implements Listener { /** * Constructor ...

Add the following directive before using any other mod_rewrite directive (RewriteRule, RewriteCond, RewriteBase or RewriteMap). RewriteEngine on By default the engine is turned off. mod_rewrite directives found while the engine is turned off are ignored. Enable it from within the virtual host co...

Important: Using the dynamic configuration files (.htaccess) is a big performance hit. When you have access to the static configuration file (httpd.conf or something similar) you should use that instead. In the static configuration file, allow dynamic configuration files to override "Filei...

An Observable can be thought of as just a stream of events. When you define an Observable, you have three listeners: onNext, onComplete and onError. onNext will be called every time the observable acquires a new value. onComplete will be called if the parent Observable notifies that it finished prod...

import serial #Serial takes these two parameters: serial device and baudrate ser = serial.Serial('/dev/ttyUSB0', 9600)

Initialize serial device import serial #Serial takes two parameters: serial device and baudrate ser = serial.Serial('/dev/ttyUSB0', 9600) to read single byte from serial device data = ser.read() to read given number of bytes from the serial device data = ser.read(size=5) to read one li...

Custom Renderer help to allows to add new properties and render them differently in native platform that can not be otherwise does through shared code. In this example we will add radius and shadow to a boxview. Firstly, we should create custom control in PCL project, which will declare some requir...

In this exemple, we want to execute code which is stored in a string format. # the string str <- "1+1" # A string is not an expression. is.expression(str) [1] FALSE eval(str) [1] "1+1" # parse convert string into expressions parsed.str <- parse(text="1+1...

This is an example on how to control PHP error logging in a virtual host site for development and debugging. Assumptions The PHP module has been installed. Development environment is not for production. <VirtualHost *:80> ServerName example.com DocumentRoot /var/www/domains/e...

Creating a chart that displays a static dataset is relatively simple. For example, if we have this array of objects as the data: var data = [ {title: "A", value: 53}, {title: "B", value: 12}, {title: "C", value: 91}, {title: "D", value: 24...

HTML: <div ng-app="myApp" ng-controller="Controller"> <some-chart data="data"></some-chart> </div> Javascript: angular.module('myApp', []) .directive('someChart', function() { return { restrict: 'E', scope: {dat...

To get started with unit testing PowerShell code using the Pester-module, you need to be familiar with three keywords/commands: Describe: Defines a group of tests. All Pester test files needs at least one Describe-block. It: Defines an individual test. You can have multiple It-blocks inside a De...

A module is a collection of related reusable functions (or cmdlets) that can easily be distributed to other PowerShell users and used in multiple scripts or directly in the console. A module is usually saved in it's own directory and consists of: One or more code files with the .psm1 file extensi...

Drop Temporary Table is used to delete the temporary table which you are created in your current session. DROP TEMPORARY TABLE tempTable1 DROP TEMPORARY TABLE IF EXISTS tempTable1 Use IF EXISTS to prevent an error occurring for tables that may not exist

Changing the edit text's appearance when it's selected, pressed and not selected can be customised easily by adding creating a new style for your edit text like so <style name="EditTextTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <item name="colorContr...

THREE.CylinderGeometry build cylinders. Cylinder Continuing from the previous example, the code to create the box could be replaced with the below. //Makes a new cylinder with // - a circle of radius 5 on top (1st parameter) // - a circle of radius 5 on the bottom (2nd parameter) // - a height...