Tutorial by Examples: du

A locator in Protractor is used to perform action on HTML dom elements. The most common and best locators used in Protractor are css, id, model and binding. For example commonly used locators are: by.css('css-selector') by.id('id')

You can use Modules to build more complex classes through composition. The include ModuleName directive incorporates a module's methods into a class. module Foo def foo_method puts 'foo_method called!' end end module Bar def bar_method puts 'bar_method called!' end end ...

The following C code uses the OpenMP parallel programming model to write the thread ID and number of threads to stdout using multiple threads. #include <omp.h> #include <stdio.h> int main () { #pragma omp parallel { // ID of the thread in the current team ...

First of all we need to add SQLite support to our application. There are two ways of doing that Download DLL suiting your system from SQLite download page and then add to the project manually Add SQLite dependency via NuGet We'll do it the second way First open the NuGet menu and search f...

The browser identifies tokens from stylesheet and coverts them into nodes which are linked into a tree structure. The entire map of all the nodes with their associated styles of a page would be the CSS Object Model. To display the webpage, a web browser takes following steps. The web browser exa...

Reduction is the process of applying a binary operator to every element of a stream to result in one value. The sum() method of an IntStream is an example of a reduction; it applies addition to every term of the Stream, resulting in one final value: This is equivalent to (((1+2)+3)+4) The reduc...

Source table RowABCD1CodeProductColourPrice21penred50032penblue-5043penred054pencilblue1765pencilgreen-1.5 to select all: = QUERY(A1:D5, "select *") or = QUERY(A1:D5, "select A, B, C, D") or convert data range into array and use this formula: = QUERY({A1:D5}, "sel...

Let us first create a simple .proto file person.proto package Protocol; message Person { required string firstName = 1; required string lastName = 2; optional int32 age = 3; } After saving we can now create the Haskell files which we can use in our project by running ...

Since JSON is stored textual column, you might want to ensure that it is properly formatted. You can add CHECK constraint on JSON column that checks is text properly formatted JSON: CREATE TABLE ProductCollection ( Id int identity primary key, Data nvarchar(max) CONSTRAINT [Data shoul...

// Define new router group $api = new \Phalcon\Mvc\Router\Group([ 'module' => 'api', ]); $api->setPrefix('/api/v1'); // API routes (Maps to Cotnroller::Action) $api->addGet('/users', 'Users::index'); $api->addGet('/users/search/{query}', 'Users::search'); $api->addGet('/...

$router = new \Phalcon\Mvc\Router(false); $router->removeExtraSlashes(true); $request = new \Phalcon\Http\Request(); $action = strtolower($request->getMethod()); // get, post, etc. $modules = ['calendar', 'main', 'user']; // names of the modules you create // you can define other static...

What we have is a list of credit cards and we'd like to calculate the premiums for all those cards that the credit card company has to pay out. The premiums themselves depend on the total number of credit cards, so that the company adjust them accordingly. We already have a function that calculate...

OOP - Object Oriented Programming is a vastly used programming paradigm in these days. In OOP, we model real world problems using Objects and there behaviors, in order to solve them, programmatically. There are four main OOP Concepts Inheritance Polymorphism Abstraction Encapsulation These...

To get the time at which your app was installed or updated, you should query Android's package manager. try { // Reference to Android's package manager PackageManager packageManager = this.getPackageManager(); // Getting package info of this application PackageInfo info = pack...

In Object Oriented Design, objects receive messages and reply to them. In Ruby, sending a message is calling a method and result of that method is the reply. In Ruby message passing is dynamic. When a message arrives rather than knowing exactly how to reply to it Ruby uses a predefined set of rules...

Ruby moves up on ancestors chain of an object. This chain can contain both modules and classes. Same rules about moving up the chain apply to modules as well. class Example end module Prepended def initialize *args return super :default if args.empty? super end end module Fi...

var bufferBlock = new BufferBlock<int>(new DataflowBlockOptions { BoundedCapacity = 1000 }); var cancellationToken = new CancellationTokenSource(TimeSpan.FromSeconds(10)).Token; var producerTask = Task.Run(async () => { var random = new Random(); while (!cancellati...

def lst = ['foo', 'foo', 'bar', 'baz'] // *modifies* the list removing duplicate items lst.unique() // [foo, bar, baz] // setting to false the "mutate" argument returns a new list, leaving the original intact lst.unique(false) // [foo, bar, baz] // convert the list to a Set, thu...

WebRTC is an open framework for the web that enables Real Time Communications in the browser. It includes the fundamental building blocks for high-quality communications on the web, such as network, audio and video components used in voice and video chat applications. These components, when impleme...

Polymorphism without inheritance in the form of duck typing as available in Python due to its dynamic typing system. This means that as long as the classes contain the same methods the Python interpreter does not distinguish between them, as the only checking of the calls occurs at run-time. class ...