The default namespace is the namespace corresponding to the absence of any prefix. It can be declared with the special xmlns attribute.
<?xml version="1.0"?>
<foo xmlns="http://www.example.com/my-namespace">
<!-- the element foo is in the namespace
htt...
A namespace binding (special xmlns or xmlns:... attribute) is in scope for all the descendants of the enclosing element, including this element.
<?xml version="1.0"?>
<root>
<my:element xmlns:my="http://www.example.com/ns1">
<!-- here, the prefix my...
<?xml version="1.0"?>
<?speech-generator voice="Siri"?>
<root xmlns:vocabulary="http://www.example.com/vocabulary">
<!-- These are the standard greetings -->
<vocabulary:greetings>
<vocabulary:greeting xml:lang="en-US&q...
Dim inputCode As Integer = Console.Read()
Console.Read() awaits input from the user and, upon receipt, returns an integer value corresponding with the character code of the entered character. If the input stream is ended in some way before input can be obtained, -1 is returned instead.
Dim inputChar As ConsoleKeyInfo = Console.ReadKey()
Console.ReadKey() awaits input from the user and, upon receipt, returns an object of class ConsoleKeyInfo, which holds information relevant to the character which the user provided as input. For detail regarding the information provided, visit t...
itertools.dropwhile enables you to take items from a sequence after a condition first becomes False.
def is_even(x):
return x % 2 == 0
lst = [0, 2, 4, 12, 18, 13, 14, 22, 23, 44]
result = list(itertools.dropwhile(is_even, lst))
print(result)
This outputs [13, 14, 22, 23, 44].
...
C++11
Deriving a class may be forbidden with final specifier. Let's declare a final class:
class A final {
};
Now any attempt to subclass it will cause a compilation error:
// Compilation error: cannot derive from final class:
class B : public A {
};
Final class may appear anywhere in cl...
Addition + and subtraction - operations can be used to combine delegate instances. The delegate contains a list of the assigned delegates.
using System;
using System.Reflection;
using System.Reflection.Emit;
namespace DelegatesExample {
class MainClass {
private delegate void MyD...
You can easily add a breakpoint to your code by clicking on the grey column to the left of the line of your VBA code where you want execution to stop. A red dot appears in the column and the breakpoint code is also highlighted in red.
You can add multiple breakpoints throughout your code and resumi...
Once a model object has been fetched, it becomes a fully realized instance of the class. As such, any additional methods can be accessed in forms and serializers (like Django Rest Framework).
Using python properties is an elegant way to represent additional values that are not stored in the databa...
This example will show you how to quickly get a hello world Aurelia application up and running using the Aurelia CLI.
Prerequisites
The Aurelia CLI is a Node.js based application, so make sure you install it first before proceeding. You will need Node.js 4.4.7 or later.
You will also need a Git c...
A commonly used CSS/Javascript library is Bootstrap. To install it into your Aurelia CLI driven application first you need to install it using Npm.
npm install bootstrap --save
Because Bootstrap has a hard dependency on jQuery, we need to make sure we also have jQuery installed:
npm install jqu...
A bi-directional value converter utilizes two methods in your Value Converter class: toView and fromView these methods are aptly named to signify which direction the data is flowing.
In our example we will be creating a prepend Value Converter which will make sure that an amount entered in our app ...
When you use or, it will either return the first value in the expression if it's true, else it will blindly return the second value. I.e. or is equivalent to:
def or_(a, b):
if a:
return a
else:
return b
For and, it will return its first value if it's false, else it r...
Stateless components are getting their philosophy from functional programming. Which implies that: A function returns all time the same thing exactly on what is given to it.
For example:
const statelessSum = (a, b) => a + b;
let a = 0;
const statefulSum = () => a++;
As you can see fro...
Recursion occurs when a function call causes that same function to be called again before the original function call terminates. For example, consider the well-known mathematical expression x! (i.e. the factorial operation). The factorial operation is defined for all nonnegative integers as follows:...
use lib 'includes';
use MySuperCoolModule;
use lib 'includes'; adds the relative directory includes/ as another module search path in @INC. So assume that you have a module file MySyperCoolModule.pm inside includes/, which contains:
package MySuperCoolModule;
If you want, you can group as ma...
updateState by key can be used to create a stateful DStream based on upcoming data. It requires a function:
object UpdateStateFunctions {
def updateState(current: Seq[Double], previous: Option[StatCounter]) = {
previous.map(s => s.merge(current)).orElse(Some(StatCounter(current)))
}
...
