XAML controls may have dependency properties that can be bound to objects from DataContext or other controls. When the type of the object being bound is different from the type of the target DependencyProperty, a converter may be used to adapt one type to another.
Converters are classes implementin...
Given a simple PHP class:
class Car
{
private $speed = 0;
public getSpeed() {
return $this->speed;
}
public function accelerate($howMuch) {
$this->speed += $howMuch;
}
}
You can write a PHPUnit test which tests the behavior of the class unde...
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...
Mapping URLs to specific templates
To fully grasp WordPress themes, you must understand two primary concepts:
Permalinks
The Template Hierarchy
A permalink is a permanent, non-changing URL (or link, to a specific resource. For instance:
example.com/about-us/ (a Page in WP)
example.com/se...
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
Android 6 (API23) introduced Doze mode which interferes with AlarmManager. It uses certain maintenance windows to handle alarms, so even if you used setExactAndAllowWhileIdle() you cannot make sure that your alarm fires at the desired point of time.
You can turn this behavior off for your app using...
Another way to implement item click listener is to use interface with several methods, the number of which is equal to the number of clickable views, and use overrided click listeners as you can see below. This method is more flexible, because you can set click listeners to different views and quite...
To support multiple resolutions and aspect ratios Libgdx uses the so called Viewports.
There are a few types of Viewports which use different strategies to handle multiple resolutions and aspect ratios.
A Viewport uses a Camera under the hood and manages it's viewportHeight and viewportWidth. You ...
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...
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...
Property scrollEnabled stores a Boolean value that determines whether scrolling is enabled or not.
If the value of this property is true/YES, scrolling is enabled, otherwise not.The default value is true
Swift
scrollview.isScrollEnabled = true
Objective-C
scrollview.scrollEnabled = YES;
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...
We can load components in two ways.
By initialize or override $components property in Controller
By using loadComponent() method in initialize() method of Controller.
Way-1
It should be override loading component by AppsController.php
load one or more component
class UsersController extend...
initialize() is introduced in CakePHP version > 3.0
As a code structure, it looks like same as beforeFilter() method. but there is many differences between beforeFilter() and initialize().
initialize() is always called after constructor is called. but beforeFilter() is not calling in case of ...
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...
