Tutorial by Examples: g

Constructor functions are functions designed to construct a new object. Within a constructor function, the keyword this refers to a newly created object which values can be assigned to. Constructor functions "return" this new object automatically. function Cat(name) { this.name = name;...

Each time you use a selector in jQuery the DOM is searched for elements that match your query. Doing this too often or repeatedly will decrease performance. If you refer to a specific selector more than once you should add it to the cache by assigning it to a variable: var nav = $('#navigation'); ...

Encapsulation allows you to make internal changes to a class without affecting any code that calls the class. This reduces coupling, or how much any given class relies on the implementation of another class. For example, let's change the implementation of the Angle class from the previous example: ...

When implementing more than one interface that have methods of the same name that include default implementations, it is ambiguous to the compiler which implementation should be used. In the case of a conflict, the developer must override the conflicting method and provide a custom implementation. ...

The basics After making changes to your source code, you should stage those changes with Git before you can commit them. For example, if you change README.md and program.py: git add README.md program.py This tells git that you want to add the files to the next commit you do. Then, commit your...

If an object is defined with static, thread, or automatic storage duration, and it has a character type, either: char, unsigned char, or signed char, it may not be accessed by a non-character type. In the below example a char array is reinterpreted as the type int, and the behavior is undefined on e...

A query engine is required in order to execute SPARQL queries over a dataset. Query engines may be embedded in applications, or accessed remotely. Remote access may be through a vendor-specific API, or through the SPARQL protocol if an implementation supports it. This documentation will not cover ho...

Forms can be defined, in a similar manner to models, by subclassing django.forms.Form. Various field input options are available such as CharField, URLField, IntegerField, etc. Defining a simple contact form can be seen below: from django import forms class ContactForm(forms.Form): contac...

use std::fs::File; use std::io::Read; fn main() { let filename = "src/main.rs"; // Open the file in read-only mode. match File::open(filename) { // The file is open (no error). Ok(mut file) => { let mut content = String::new(); ...

In the Web App blade of the Azure Portal, click All settings > WebJobs to show the WebJobs blade: Click Add. The Add WebJob dialog appears. Under Name, provide a name for the WebJob. The name must start with a letter or a number and cannot contain any special characters other than...

In your config\services.php you can add the following code 'facebook' => [ 'client_id' => 'your-facebook-app-id', 'client_secret' => 'your-facebook-app-secret', 'redirect' => 'http://your-callback-url', ], You'll also need to add the Provider to your config\app.php L...

return Socialite::driver('facebook')->redirect(); This will redirect an incoming request to the appropriate URL to be authenticated. A basic example would be in a controller <?php namespace App\Http\Controllers\Auth; use Socialite; class AuthenticationController extends Controller...

/** * LoginController constructor. * @param Socialite $socialite */ public function __construct(Socialite $socialite) { $this->socialite = $socialite; } Within the constructor of your Controller, you're now able to inject the Socialite class that will help you handle login with so...

Usually we want to separate the creation of the dialog from its appearance. Then three steps are needed. Create base element <div id="dialog" title="Basic dialog"> <p>This is the default dialog which is useful for displaying information. The dialog window can...

Model creation Model classes must extend Illuminate\Database\Eloquent\Model. The default location for models is the /app directory. A model class can be easily generated by the Artisan command: php artisan make:model [ModelName] This will create a new PHP file in app/ by default, which is name...

EXPOSE <port> [<port>...] From Docker's documentation: The EXPOSE instruction informs Docker that the container listens on the specified network ports at runtime. EXPOSE does not make the ports of the container accessible to the host. To do that, you must use either the -p flag to ...

docker exec -it <container id> /bin/bash It is common to log in an already running container to make some quick tests or see what the application is doing. Often it denotes bad container use practices due to logs and changed files should be placed in volumes. This example allows us log in the...

function getContentTypes(site_url,name_of_the_library){ var ctx = new SP.ClientContext(site_url); var web = ctx.get_web(); list = web.get_lists().getByTitle(name_of_the_library); // You can include any property of the SP.ContentType object (sp.js), for this example we are just ...

9.0 // Since the anchor system simply returns constraints, you still need to add them somewhere. View.AddConstraints( new[] { someLabel.TopAnchor.ConstraintEqualTo(TopLayoutGuide.GetBottomAnchor()), anotherLabel.TopAnchor.ConstraintEqualTo(someLabel.BottomAnchor, 6), ...

// Using Visual Format Language requires a special look-up dictionary of names<->views. var views = new NSDictionary( nameof(someLabel), someLabel, nameof(anotherLabel), anotherLabel, nameof(oneMoreLabel), oneMoreLabel ); // It can also take a look-up dictionary for metrics (...