Extension methods can be used to "hide" processing of inelegant business rules that would otherwise require cluttering up a calling function with if/then statements. This is similar to and analogous to handling nulls with extension methods. For example,
public static class CakeExtensions
...
By default, a new class module is a Private class, so it is only available for instantiation and use within the VBProject in which it is defined. You can declare, instantiate and use the class anywhere in the same project:
'Class List has Instancing set to Private
'In any other module in the SAME ...
static and templates folder in the apps may should also contain a folder with the name of app ex. blog this is a convention used to prevent namespace pollution, so we reference the files like /blog/base.html rather than /base.html which provides more clarity about the file we are referencing and pre...
The following output equivalent results:
class IfElseExample
{
public string DebugToString(object a)
{
if (a is StringBuilder)
{
return DebugToStringInternal(a as StringBuilder);
}
else if (a is List<string>)
{
...
Short circuiting is a functionality that skips evaluating parts of a (if/while/...) condition when able.
In case of a logical operation on two operands, the first operand is evaluated (to true or false) and if there is a verdict (i.e first operand is false when using &&, first operand is tr...
After turning Lazy loading off you can lazily load entities by explicitly calling Load method for entries. Reference is used to load single navigation properties, whereas Collection is used to get collections.
Company company = context.Companies.FirstOrDefault();
// Load founder
context.Entry(com...
Using NuGet
Install-Package Cirrious.FluentLayout
An expanded example based on the starter example at the GitHub Page, a simple first name, last name labels and fields all stacked one on top of the other:
public override void ViewDidLoad()
{
//create our labels and fields
var firstNa...
infixl vs infixr vs infix describe on which sides the parens will be grouped. For example, consider the following fixity declarations (in base)
infixl 6 -
infixr 5 :
infix 4 ==
The infixl tells us that - has left associativity, which means that 1 - 2 - 3 - 4 gets parsed as
((1 - 2) - 3) - 4
...
The implicit keyword is used to overload a conversion operator. For example, you may declare a Fraction class that should automatically be converted to a double when needed, and that can be automatically converted from int:
class Fraction(int numerator, int denominator)
{
public int Numerator...
VB 14.0 introduces the ability to add comments after implicit line continuation.
Dim number =
From c As Char 'Comment
In "dj58kwd92n4" 'Comment
Where Char.IsNumber(c) 'Comment
Select c 'Comment
Using the System.String.Replace method, you can replace part of a string with another string.
string s = "Hello World";
s = s.Replace("World", "Universe"); // s = "Hello Universe"
All the occurrences of the search string are replaced.
This method can al...
To find out what packages your project directly depends on, you can simply use this command:
stack list-dependencies
This way you can find out what version of your dependencies where actually pulled down by stack.
Haskell projects frequently find themselves pulling in a lot of libraries indirec...
Add the following code to the onCreate()/onResume() method:
SensorManager sensorManager;
Sensor mAccelerometer;
final float movementThreshold = 0.5f; // You may have to change this value.
boolean isMoving = false;
float[] prevValues = {1.0f, 1.0f, 1.0f};
float[] currValues = new float[3];
...
A spring bean can be configured such that it will register only if it has a particular value or a specified property is met. To do so, implement Condition.matches to check the property/value:
public class PropertyCondition implements Condition {
@Override
public boolean matches(ConditionC...
The Fibonacci numbers are defined inductively as
F0 = 0
F1 = 1
Fn+2 = Fn + Fn+1
The sum of the first n+1 Fibonacci numbers is given by
F0 + F1 + F2 + ... + Fn = Fn+2 - 1.
This summation arises, among other places, in the analysis of Fibonacci heaps, where it's used to provide a lower b...
Vectors can be map'd and fold'd,filter'd andzip`'d:
Prelude Data.Vector> Data.Vector.map (^2) y
fromList [0,1,4,9,16,25,36,49,64,81,100,121] :: Data.Vector.Vector
Reduce to a single value:
Prelude Data.Vector> Data.Vector.foldl (+) 0 y
66
python-social-auth is a framework that simplifies the social authentication and authorization mechanism. It contains many social backends (Facebook, Twitter, Github, LinkedIn, etc.)
INSTALL
First we need to install the python-social-auth package with
pip install python-social-auth
or download ...
A process can (try to) send a signal to any other process using the kill() function.
To do so, the sending process needs to known the receiving process' PID. As, without introducing a race, a process can only be sure of its own PID (and the PIDs of its children) the most simple example to demonstra...
