Returns a string that represents the unqualified name of a variable, type, or member.
int counter = 10;
nameof(counter); // Returns "counter"
Client client = new Client();
nameof(client.Address.PostalCode)); // Returns "PostalCode"
The nameof operator was introduced in C# ...
compile built-in function can be used to precompile an expression to a code object; this code object can then be passed to eval. This will speed up the repeated executions of the evaluated code. The 3rd parameter to compile needs to be the string 'eval'.
>>> code = compile('a * b + c', '&l...
>>> variables = {'a': 6, 'b': 7}
>>> eval('a * b', globals=variables)
42
As a plus, with this the code cannot accidentally refer to the names defined outside:
>>> eval('variables')
{'a': 6, 'b': 7}
>>> eval('variables', globals=variables)
Traceback (most ...
You can fetch the current properties of the Annotation by using Reflection to fetch the Method or Field or Class which has an Annotation applied to it, and then fetching the desired properties.
@Retention(RetentionPolicy.RUNTIME)
@interface MyAnnotation {
String key() default "foo";...
As the static keyword is used for accessing fields and methods without an instantiated class, it can be used to declare constants for use in other classes. These variables will remain constant across every instantiation of the class. By convention, static variables are always ALL_CAPS and use unders...
It is possible to create a QtQuick view directly from C++ and to expose to QML C++ defined properties. In the code below the C++ program creates a QtQuick view and exposes to QML the height and width of the view as properties.
main.cpp
#include <QApplication>
#include <QQmlContext>
#...
If you want to mock AR that doesn't try to connect to database you can do it in the following way (if using PHPUnit):
$post = $this->getMockBuilder('\app\model\Post')
->setMethods(['save', 'attributes'])
->getMock();
$post->method('save')->willReturn(true);
$post->meth...
Jagged arrays are arrays that instead of primitive types, contain arrays (or other collections). It's like an array of arrays - each array element contains another array.
They are similar to multidimensional arrays, but have a slight difference - as multidimensional arrays are limited to a fixed nu...
The Application directive defines application-specific attributes. It is provided at the top of the global.aspx file.
The basic syntax of Application directive is:
<%@ Application Language="C#" %>
The attributes of the Application directive are:
AttributesDescriptionInheritsThe...
The control directive is used with the user controls and appears in the user control (.ascx) files.
The basic syntax of Control directive is:
<%@ Control Language="C#" EnableViewState="false" %>
The attributes of the Control directive are:
AttributesDescriptionAutoEv...
The Implement directive indicates that the web page, master page or user control page must implement the specified .Net framework interface.
The basic syntax for implements directive is:
<%@ Implements Interface="interface_name" %>
The Master directive specifies a page file as being the mater page.
The basic syntax of sample MasterPage directive is:
<%@ MasterPage Language="C#" AutoEventWireup="true" CodeFile="SiteMater.master.cs" Inherits="SiteMaster" %>
The Import directive imports a namespace into a web page, user control page of application. If the Import directive is specified in the global.asax file, then it is applied to the entire application. If it is in a page of user control page, then it is applied to that page or control.
The basic synt...
The MasterType directive assigns a class name to the Master property of a page, to make it strongly typed.
The basic syntax of MasterType directive is:
<%@ MasterType attribute="value"[attribute="value" ...] %>
The Page directive defines the attributes specific to the page file for the page parser and the compiler.
The basic syntax of Page directive is:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Trace="tr...
The OutputCache directive controls the output caching policies of a web page or a user control.
The basic syntax of OutputCache directive is:
<%@ OutputCache Duration="15" VaryByParam="None" %>
This example show how you can check if a service already exists (i.e., is installed on the machine) or not. This code requires only the lowest privileges necessary, so each process can perform the check, no matter what level of security it is running at.
#define UNICODE
#define _UNICODE
#include ...
>>> '{0:.0f}'.format(42.12345)
'42'
>>> '{0:.1f}'.format(42.12345)
'42.1'
>>> '{0:.3f}'.format(42.12345)
'42.123'
>>> '{0:.5f}'.format(42.12345)
'42.12345'
>>> '{0:.7f}'.format(42.12345)
'42.1234500'
Same hold for other way of referenc...
You can also use regular expressions to split a string. For example,
import re
data = re.split(r'\s+', 'James 94 Samantha 417 Scarlett 74')
print( data )
# Output: ['James', '94', 'Samantha', '417', 'Scarlett', '74']
