Tutorial by Examples: l

class (Functor t, Foldable t) => Traversable t where {-# MINIMAL traverse | sequenceA #-} traverse :: Applicative f => (a -> f b) -> t a -> f (t b) traverse f = sequenceA . fmap f sequenceA :: Applicative f => t (f a) -> f (t a) sequenceA = t...

<?xml version="1.0" encoding="UTF-8"?> <Configuration> <Appenders> <Console name="STDOUT" target="SYSTEM_OUT"> <PatternLayout pattern="%d %-5p [%t] %C{2} %m%n"/> </Console> </Appenders&gt...

A method can take an array parameter and destructure it immediately into named local variables. Found on Mathias Meyer's blog. def feed( amount, (animal, food) ) p "#{amount} #{animal}s chew some #{food}" end feed 3, [ 'rabbit', 'grass' ] # => "3 rabbits chew some gra...

Step 1: Create a new Rails app gem install rails -v 4.1 rails new angular_example Step 2: Remove Turbolinks Removing turbolinks requires removing it from the Gemfile. gem 'turbolinks' Remove the require from app/assets/javascripts/application.js: //= require turbolinks Step 3: Add Angu...

Always use Rails.logger.{debug|info|warn|error|fatal} rather than puts. This allows your logs to fit into the standard log format, have a timestamp and have a level so you choose whether they are important enough to be shown in a specific environment. You can see the separate log files for your appl...

<Window x:Class="MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://sche...

By default the Custom Tool property for a VB resource file is VbMyResourcesResXFileCodeGenerator. However, with this code generator the view (XAML) will not be able to access the resources. To solve this problem add Public before the Custom Tool property value. To select the Resources.resx file in ...

<Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc=&...

Open the resource file by double clicking it. Change the Access Modifier to "Public".

Bean1 @ManagedBean @ViewScoped public class Bean1 implements Serializable { /** * Just takes the given param, sets it into flash context and redirects to * page2 * * @param inputValue * @return */ public String goPage2(String inputValue) { ...

Sometimes you might accidentally run something in the shell that ends up waiting forever, and thus blocking the shell: iex(2)> receive do _ -> :stuck end In that case, press Ctrl-g. You'll see: User switch command Enter these commands in order: k (to kill the shell process) s (to st...

Computed observables are functions that can "watch" or "react" to other observables on the view model. The following example shows how you would display the total number of users and the average age. Note: The example below can also make use of pureComputed() (introduced in v3....

You can return an anonymous object from your function public static object FunctionWithUnknowReturnValues () { /// anonymous object return new { a = 1, b = 2 }; } And assign the result to a dynamic object and read the values in it. /// dynamic object dynamic x = FunctionWithUnknowR...

You can return an instance of Tuple class from your function with two template parameters as Tuple<string, MyClass>: public Tuple<string, MyClass> FunctionWith2ReturnValues () { return Tuple.Create("abc", new MyClass()); } And read the values like below: Console.Wri...

You might want to use it when parsing DateTimes from different cultures (languages), following example parses Dutch date. DateTime dateResult; var dutchDateString = "31 oktober 1999 04:20"; var dutchCulture = CultureInfo.CreateSpecificCulture("nl-NL"); DateTime.TryParse(dutch...

You can install Magit from MELPA with: M-x package-install RET magit RET

Using a new List List<String> list = new ArrayList<String>(listOfElements); Using List.addAll() method Set<String> set = new HashSet<String>(); set.add("foo"); set.add("boo"); List<String> list = new ArrayList<String&...

Class Car Private wheels_ Private distances_ ' Property getter Public Property Get Wheels() Wheels = wheels_ End Property ' Property setter Public Property Let Wheels(v) wheels_ = v End Property ' Parameterless Constructo...

' Initialize the object Dim myCar Set myCar = new Car ' Setting a property myCar.Wheels = 4 ' Getting a property value wscript.echo myCar.Wheels ' Using a subroutine in a class myCar.Drive 10 myCar.Drive 12 ' Using a function in a class wscript.echo myCar.GetTotalDistance() ' r...

' Making a factory with parameter to the class Public Function new_Car(wheels) Set new_Car = New Car new_Car.Wheels = wheels End Function ' Creating a car through a factory Dim semiTrailer Set semiTrailer = new_Car(18)