Tutorial by Examples: am

Suppose we want to receive a function as a parameter, we can do it like this: function foo(otherFunc: Function): void { ... } If we want to receive a constructor as a parameter: function foo(constructorFunc: { new() }) { new constructorFunc(); } function foo(constructorWithParams...

A list of recognised color keyword names can be found in the W3C Recommendation for SVG. <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <circle r="30" cx="100" cy="100" fill="red" stroke=&qu...

In this example a custom LAMP project development environment is created with Vagrant. First of all you will need to install Virtual Box and Vagrant. Then, create a vagrant folder in your home directory, open your terminal and change the current directory to the new vagrant directory. Now, execute...

You have a local vagrant box that you want to upload to Amazon AWS. First, you need to create a .box file: vagrant package --base my-virtual-machine This step should take a while depending on the size of your image. Then, you need to get the .vmdk image from the .box file: gunzip -S .box packag...

When you pass an argument to a function, and the argument is a prvalue expression of the function's parameter type, and this type is not a reference, then the prvalue's construction can be elided. void func(std::string str) { ... } func(std::string("foo")); This says to create a tem...

If you return an lvalue expression from a function, and this lvalue: represents an automatic variable local to that function, which will be destroyed after the return the automatic variable is not a function parameter and the type of the variable is the same type as the function's return type ...

/// <summary> /// Gets a BackgroundTask by its name /// </summary> /// <param name="taskName">Name of the task to find</param> /// <returns>The found Task or null if none found</returns> public BackgroundTaskRegistration TaskByName(string taskName) ...

In order to login to a user's account on machine with SSH you can use the command ssh username@ip_address. It will ask for a password. If you type the correct password, you will be connected to the shell of that user on that machine. Otherwise it will prompt for the password again. For example roo...

Protocol Oriented Programming is a useful tool in order to easily write better unit tests for our code. Let's say we want to test a UIViewController that relies on a ViewModel class. The needed steps on the production code are: Define a protocol that exposes the public interface of the class Vi...

import ( "io/ioutil" "path/filepath" "gopkg.in/yaml.v2" ) func main() { filename, _ := filepath.Abs("config/config.yml") yamlFile, err := ioutil.ReadFile(filename) var config Config err = yaml.Unmarshal(yamlFile, &c...

By default, the navigation pattern works like a stack of pages, calling the newest pages over the previous pages. You will need to use the NavigationPage object for this. Pushing new pages ... public class App : Application { public App() { MainPage = new NavigationPage(new ...

Modal pages can created in three ways: From NavigationPage object for full screen pages For Alerts and Notifications For ActionSheets that are pop-ups menus Full screen modals ... // to open await Navigation.PushModalAsync(new ModalPage()); // to close await Navigation.PopModalAsync(); ...

The below code will turn the table with an id of tableid into a DataTable, as well as return a DataTables API instance: $(document).ready(function() { $('#tableid').DataTable(); }); Compare this to the below code, which will turn the table into a DataTable but will not return a DataTables ...

All you need is a variable of type IHostingEnvironment: get environment name: env.EnvironmentName for predefined Development, Staging, Production environments the best way is to use extension methods from HostingEnvironmentExtensions class env.IsDevelopment() env.IsStaging() ...

Returns the names of constants in the specified Enum as a string array: Module Module1 Enum Size Small Medium Large End Enum Sub Main() Dim sizes = [Enum].GetNames(GetType(Size)) For Each size In sizes Console.WriteLine(size) Next End Sub ...

Common Lisp REPL is an interactive environment. Every form written after the prompt is evaluated, and its value is afterwards printed as result of the evaluation. So the simplest possible “Hello, World!” program in Common Lisp is: CL-USER> "Hello, World!" "Hello, World!" CL...

Codename One is a set of tools for mobile application development that derive a great deal of its architecture from Java. Codename One's mission statement is: Unify the complex and fragmented task of mobile device programming into a single set of tools, APIs & services. As a result create a...

In F#, all functions take exactly one parameter. This seems an odd statement, since it's trivially easy to declare more than one parameter in a function declaration: let add x y = x + y But if you type that function declaration into the F# interactive interpreter, you'll see that its type signat...

Electron ports HTML web applications to native applications for a range of devices, including creating native desktop applications. It's also very easy to get started! To begin, we must have electron, nodejs, npm, git and meteor installed. Familiarity with these tools is vital for working with Mete...

Let's download a Meteor Todos example project, using a Linux shell (command line) script, to test out Electrifying a project for the first time: Requirements for this section: Git apt-get install git-all There are many ways to install Git. Check them out here. git is a version control sys...