Tutorial by Examples: on

installing npm install web-component-tester --save-dev setting up wct.conf.js module.exports = { verbose: true, plugins: { local: { browsers: ['chrome'] } } }; running node node_modules/web-component-tester/bin/wct test/index.html <html...

A variable declared constexpr is implicitly const and its value may be used as a constant expression. Comparison with #define A constexpr is type-safe replacement for #define based compile-time expressions. With constexpr the compile-time evaluated expression is replaced with the result. For examp...

Ada is a programming language for which there exists multiple compilers. One of these compilers, and perhaps the most used, is GNAT. It is part of the GCC toolchain. It can be installed from several sources: The yearly GPL release done by AdaCore, available for free on libre site. This ver...

Note: This example is based on the Oracle JVM implementation. Built-in tools like jmap, jconsole, and jvisualvm are available in a JDK and can be used to generate and analyze heap memory dumps taken from a running JVM application. However, one option to generate a heap dump without using JDK tools ...

class Foldable t where {-# MINIMAL foldMap | foldr #-} foldMap :: Monoid m => (a -> m) -> t a -> m foldMap f = foldr (mappend . f) mempty foldr :: (a -> b -> b) -> b -> t a -> b foldr f z t = appEndo (foldMap (Endo #. f) t) z -- and a nu...

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...

Window functions are used to do operations(generally aggregation) on a set of rows collectively called as window. Window functions work in Spark 1.4 or later. Window functions provides more operations then the built-in functions or UDFs, such as substr or round (extensively used before Spark 1.4). W...

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...

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

The common error using ssh is to see the error like @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone c...

' 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)

Conversion SpecifierType of ArgumentDescriptioni, dintprints decimaluunsigned intprints decimalounsigned intprints octalxunsigned intprints hexadecimal, lower-caseXunsigned intprints hexadecimal, upper-casefdoubleprints float with a default precision of 6, if no precision is given (lower-case used f...

Useful information The very beginning of the text field text: let startPosition: UITextPosition = textView.beginningOfDocument The very end of the text field text: let endPosition: UITextPosition = textView.endOfDocument The currently selected range: let selectedRange: UITextRange? = textV...

The example below shows how to add a navigation bar button (called a UIBarButtonItem) in the Interface Builder. Add a Navigation Controller to your Storyboard Select your View Controller and then in the Xcode menu choose Editor > Embed In > Navigation Controller. Alternatively, you could ...

Below is an example of a pure Xamarin Forms custom control. No custom rendering is being done for this but could easily be implemented, in fact, in my own code, I use this very same control along with a custom renderer for both the Label and Entry. The custom control is a ContentView with a Label, ...

When you have a zoomed Image (or other content) you may want to drag around the Image to show all of its content in the zoomed in state. This can be achieved by implementing the PanGestureRecognizer. From code this looks like so: var panGesture = new PanGestureRecognizer(); panGesture.PanUpdated...