Tutorial by Examples: p

int a = 0, b = 2; const int* pA = &a; // pointer-to-const. `a` can't be changed through this int* const pB = &a; // const pointer. `a` can be changed, but this pointer can't. const int* const pC = &a; // const pointer-to-const. //Error: Cannot assign to a const reference *pA = b...

The = operator is used for assignment. The == operator is used for comparison. One should be careful not to mix the two. Sometimes one mistakenly writes /* assign y to x */ if (x = y) { /* logic */ } when what was really wanted is: /* compare if x is equal to y */ if (x == y) { ...

Matplotlib is a mathematical plotting library for Python that provides a variety of different plotting functionality. The matplotlib documentation can be found here, with the SO Docs being available here. Matplotlib provides two distinct methods for plotting, though they are interchangable for the...

Installing pipeline Once Heroku Toolbelt is installed it requires Pipelines plugin too. heroku plugins:install heroku-pipelines Creating pipelines You must start with an app to add to the pipeline, although it doesn’t have to be for a particular stage. If you don’t specify --stage STAGE, the...

Detailed instructions on getting ibm-midrange set up or installed.

This example shows setting up a small application with 3 routes, each with it's own view and controller, using the controllerAs syntax. We configure our router at the angular .config function We inject $routeProvider into .config We define our route names at the .when method with a route defini...

To create simple actors without creating a new class, you can use: import akka.actor.ActorDSL._ import akka.actor.ActorSystem implicit val system = ActorSystem("demo") val a = actor(new Act { become { case "hello" ⇒ sender() ! "hi" } })

It is also possible to assign a supervision strategy to these actors with the following: superviseWith(OneForOneStrategy() { case e: Exception if e.getMessage == "hello" ⇒ Stop case _: Exception ⇒ Resume })

Last but not least there is a little bit of convenience magic built-in, which detects if the runtime class of the statically given actor subtype extends the RequiresMessageQueue trait via the Stash trait (this is a complicated way of saying that new Act with Stash would not work because its runtime ...

Open Control Panel -> Programs and Features, choose the Visual Studio 2015 item, and then choose the Change button. In the setup wizard for Visual Studio, choose the Modify button. In the list of optional features to install, select the HTML/JavaScript (Apache Cordova) checkbox, c...

In Visual Studio, choose Tools->Extensions and Updates. In the Updates tab of the Extensions and Updates dialog box, choose Product Updates. If an update for Visual Studio Tools for Apache appears, select it, and then choose the Update button.

Angular supports three types of expressions in the ng-class directive. 1. String <span ng-class="MyClass">Sample Text</span> Specifying an expression that evaluates to a string tells Angular to treat it as a $scope variable. Angular will check the $scope and look for a va...

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <path d="M 10,10 L 100,50" stroke="blue" stroke-width="5" /> </svg> Result:

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <path d="M 10,10 l 90,90 M 100,10 l -90,90" stroke="red" stroke-width="10" /> </svg> Result:

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <path d="M 10,10 V 200" stroke="green" stroke-width="5" /> </svg> Result:

Intoduction Since Visual Studio 2005 can you make Intellisense Code Snippets. This allow you to generate some code just by typing one keyword and press two times the tab key. Using the code The XML code you need for make an Intellisense Code Snippet stands below: <?xml version="1.0"...

Sometimes you may want to have a lambda expression implementing more than one interface. This is mostly useful with marker interfaces (such as java.io.Serializable) since they don't add abstract methods. For example, you want to create a TreeSet with a custom Comparator and then serialize it and se...

Hibernate (and embedded H2 DB) <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/...

To obtain a Java's Class object from Kotlin's KClass use the .java extension property: val stringKClass: KClass<String> = String::class val c1: Class<String> = stringKClass.java val c2: Class<MyClass> = MyClass::class.java The latter example will be optimized by the compile...

Background pages are implicit pages which contain background scripts. A background script is a single long-running script to manage some task or state. It exists for the lifetime of your extension, and only one instance of it at a time is active. You can declare it like this in your manifest.json: ...