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All widely used Prolog interpreters use argument indexing to efficiently select suitable clauses. Users can typically rely on at least first argument indexing, meaning that clauses can be efficiently told apart by the functor and arity of the outermost term of the first argument. In calls where tha...

In this example we illustrate how to take a double real-type 3D matrix from MATLAB, and pass it to a C double* array. The main objectives of this example are showing how to obtain data from MATLAB MEX arrays and to highlight some small details in matrix storage and handling. matrixIn.cpp #include...

To retreive the screens width and height in pixels, we can make use of the WindowManagers display metrics. // Get display metrics DisplayMetrics metrics = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(metrics); These DisplayMetrics hold a series of informatio...

Generally, if we want to remove an element from an array, we need to know it's index so that we can remove it easily using remove(at:) function. But what if we don't know the index but we know the value of element to be removed! So here is the simple extension to an array which will allow us to re...

public class CustomTextView extends TextView { private float strokeWidth; private Integer strokeColor; private Paint.Join strokeJoin; private float strokeMiter; public CustomTextView(Context context) { super(context); init(null); } public ...

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...

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...

CoffeeScript is a scripting language that compiles into JavaScript. Any code written in CoffeeScript can be translated into JavaScript with a one-to-one matching. CoffeeScript can be easily installed with npm: $ mkdir coffee && cd coffee $ npm install -g coffee-script The -g flag will ...

Extension Method can work on null references, but you can use ?. to null-check anyway. public class Person { public string Name {get; set;} } public static class PersonExtensions { public static int GetNameLength(this Person person) { return person == null ? -1 : pers...

Given a hello.groovy file with content: #!/usr/bin/env groovy println "Hello world" Can be executed from the command line if given execution permission as $ ./hello.groovy

public void MoveToStateAndExecuteActions(Item item, ID workflowStateId) { Sitecore.Workflows.IWorkflowProvider workflowProvider = Item.Database.WorkflowProvider; Sitecore.Workflows.IWorkflow workflow = workflowProvider.GetWorkflow(item); // if item is in any workflow if (workf...

Thanks to this great post If we want to mimic the Sitecore UI behavior and execute the command which will change the workflow state, we need to use WorkflowProvider to get an instance of the workflow assigned to the given item and call Execute method with a chosen command ID. This will fire all the...

Swift class PickerViewExampleViewController : UIViewController, UIPickerViewDelegate, UIPickerViewDataSource { @IBOutlet weak var btnFolder: UIButton! let pickerView = UIPickerView() let pickerViewRows = ["First row,", "Secound row,","Third row,","F...

A common use-case for iterators is to perform some operation over a collection of numbers. The example below demonstrates how each element within an array of numbers can be individually printed out to the console. This is possible because arrays implement the IEnumerable interface, allowing clients...

Assume you want to create an extension property that is expensive to compute. Thus you would like to cache the computation, by using the lazy property delegate and refer to current instance (this), but you cannot do it, as explained in the Kotlin issues KT-9686 and KT-13053. However, there is an off...

Mixins are a beautiful way to achieve something similar to multiple inheritance. It allows us to inherit or rather include methods defined in a module into a class. These methods can be included as either instance or class methods. The below example depicts this design. module SampleModule def...

Extended asm support in gcc has the following syntax: asm [volatile] ( AssemblerTemplate : OutputOperands [ : InputOperands [ : Clobbers ] ]) asm [volatile] goto ( AssemblerTemplate : : Inp...

Another way, which is very readable and elegant, but far less efficient than a if/else structure, is to build a class such as follows, that will read and store the value to compare with, expose itself within the context as a callable that will return true if it matches the stored value: class Switc...

It might be easier if you think of GROUP BY as "for each" for the sake of explanation. The query below: SELECT EmpID, SUM (MonthlySalary) FROM Employee GROUP BY EmpID is saying: "Give me the sum of MonthlySalary's for each EmpID" So if your table looked like this: +----...

When you need to pass some data from the parent task to its children tasks, so it logically flows with the execution, use AsyncLocal class: void Main() { AsyncLocal<string> user = new AsyncLocal<string>(); user.Value = "initial user"; // this does not aff...