Tutorial by Examples: u

The following code makes the UI unresponsive for a short while after the button click, since too many Platform.runLater calls are used. (Try scrolling the ListView immediately after the button click.) @Override public void start(Stage primaryStage) { ObservableList<Integer> data = FXCol...

The java.util.LinkedList class, while implementing java.util.List is a general-purpose implementation of java.util.Queue interface too operating on a FIFO (First In, First Out) principle. In the example below, with offer() method, the elements are inserted into the LinkedList. This insertion operat...

Detailed instructions on getting performance set up or installed.

Specific for <li> tags within an unordered list (<ul>): list-style: disc; /* A filled circle (default) */ list-style: circle; /* A hollow circle */ list-style: square; /* A filled square */ list-style: '-'; /* any string */ ...

If you plan to host your Django website on Heroku, you can start your project using the Heroku Django Starter Template : django-admin.py startproject --template=https://github.com/heroku/heroku-django-template/archive/master.zip --name=Procfile YourProjectName It has Production-ready configurati...

SELECT Id, Name FROM Account This will return the Id and Name fields from the Account table. No filtering or sorting will be applied.

SELECT Name FROM User WHERE IsActive = true This will return the name of all active Users. SELECT Name, Phone FROM Contact WHERE CreatedDate >= 2016-01-01T00:00:00.000Z This will return Contacts created on or after January 1st, 2016. SELECT Id, Name FROM Account LIMIT 100 This will ret...

SELECT Id, Name FROM User ORDER BY LastName SELECT Id, Name FROM Contact ORDER BY LastModifiedDate DESC SELECT Name, Title FROM User ORDER BY Title ASC NULLS FIRST SELECT Id FROM Contact ORDER BY LastName ASC NULLS LAST, FirstName ASC NULLS FIRST

HVFL is a language designed to constrain UI elements in a simple and quick fashion. Generally, VFL has an advantage over traditional UI customization in the Interface Builder because it's much more readable, accessible and compact. Here's an example of VFL, in which three UIViews are constrained f...

After defining an enum using any of the above ways and setting a variable, you can print both the variable's value as well as the corresponding name from the enum for the value. Here's an example: // Define the enum var ColorsEnum = { WHITE: 0, GRAY: 1, BLACK: 2 } Object.freeze(ColorsEnum); // D...

A lot of the value from local JVM unit tests comes from the way you design your application. You have to design it in such a way where you can decouple your business logic from your Android Components. Here is an example of such a way using the Model-View-Presenter pattern. Lets practice this out by...

Create UIScrollView instance let scrollview = UIScrollView.init(frame: self.view.bounds) And then set these properties: scrollView.minimumZoomScale = 0.1 scrollView.maximumZoomScale = 4.0 scrollView.zoomScale = 1.0 scrollview.delegate = self as? UIScrollViewDelegate To zoom in and out im...

Passing Variable in URL as a method's parameter return $this->redirect([ 'controller' => 'users', 'action' => 'profile', $id ]); Url should be looks like this http://your_app_url/users/profile/{id} in UsersController.php file in profile() method class UsersController e...

Set default layout for entire application. i.e, created layout file in /src/Template/Layout/admin.ctp class AppsController extends Controller { public function beforeFilter(Event $event) { parent::beforeFilter($event); $this->viewBuilder()->layout('admin'); // For Ver...

Generally in AJAX request no need of load CSS, JS. Also omitting other HTML code. Make ajax.ctp file in /src/Template/Layout, and code should be <?php $this->fetch('content'); Set AJAX based layout for entire application, in AppsController.php class AppsController extends Controlle...

You can retrieve query string data as Array. $post_data= $this->request->query; You can retrieve post data for particular key. $this->request->query['field']; Retrieve specific key value $this->request->query('key_name'); Retrieve specific key value of nested array $th...

dependencies { compile 'com.google.code.gson:gson:2.8.1' } To use latest version of Gson The below line will compile latest version of gson library everytime you compile, you do not have to change version. Pros: You can use latest features, speed and less bugs. Cons: It might break com...

This will load a JSON file from disk and convert it to the given type. public static <T> T getFile(String fileName, Class<T> type) throws FileNotFoundException { Gson gson = new GsonBuilder() .create(); FileReader json = new FileReader(fileName); return gson....

Sometimes you need to serialize or deserialize some fields in a desired format, for example your backend may use the format "YYYY-MM-dd HH:mm" for dates and you want your POJOS to use the DateTime class in Joda Time. In order to automatically convert these strings into DateTimes object, y...

First of all you need to add the GsonConverterFactory to your build.gradle file compile 'com.squareup.retrofit2:converter-gson:2.1.0' Then, you have to add the converter factory when creating the Retrofit Service: Gson gson = new GsonBuilder().create(); new Retrofit.Builder() .baseUrl...