Tutorial by Examples: classes

First Test.class: package foo.bar public class Test { } Also Test.class in another package package foo.bar.baz public class Test { } The above is fine because the two classes exist in different packages.

var providerName = "System.Data.SqlClient"; //Oracle.ManagedDataAccess.Client, IBM.Data.DB2 var connectionString = "{your-connection-string}"; //you will probably get the above two values in the ConnectionStringSettings object from .config file var factory = DbProviderFac...

Built-in forms are great but sometimes there is a need to customize them, adding new fields or simply changing CSS attributes. This example is applicable to several use cases but here it is presented regarding PasswordChangeForm and its use in a Bootstrap website. The solution is to create another...

In Python 3.6, PEP 487 added the __init_subclass__ special method, which simplifies and extends class customization without using metaclasses. Consequently, this feature allows for creating simple plugins. Here we demonstrate this feature by modifying a prior example: Python 3.x3.6 class Base: ...

RTE { classes { btn-lg { name = Button (large) requires = btn btn-default } btn-default { name = Button (default) requires = btn } } default { buttons.link.properties.class.allowedClas...

Teacher Class: class Teacher { private String name; private double salary; private String subject; public Teacher (String tname) { name = tname; } public String getName() { return name; } private double getSal...

Suppose we'd like to wrap the Google Maps JavaScript API google.maps: @JS('google.maps') library maps; import "package:js/js.dart"; @JS() class Map { external Map(Location location); external Location getLocation(); } We now have the Map Dart class which corresponds to t...

You can define methods and classes within JShell: jshell> void speak() { ...> System.out.println("hello"); ...> } jshell> class MyClass { ...> void doNothing() {} ...> } No access modifiers are necessary. As with other blocks, semicolons are require...

Skeleton of declaring class is: <>:Required []:Optional [private/public/protected/internal] class <Desired Class Name> [:[Inherited class][,][[Interface Name 1],[Interface Name 2],...] { //Your code } Don't worry if you can't understand whole syntax,We'll be get familiar wit...

When creating a std::unique_lock, there are three different locking strategies to choose from: std::try_to_lock, std::defer_lock and std::adopt_lock std::try_to_lock allows for trying a lock without blocking: { std::atomic_int temp {0}; std::mutex _mutex; std::thread t( [&...

The List interface is implemented by different classes. Each of them has its own way for implementing it with different strategies and providing different pros and cons. Classes implementing List These are all of the public classes in Java SE 8 that implement the java.util.List interface: Abs...

std::async: performs an asynchronous operation. std::future: provides access to the result of an asynchronous operation. std::promise: packages the result of an asynchronous operation. std::packaged_task: bundles a function and the associated promise for its return type.

The following rules define a simple strategy for creating immutable objects. Don't provide "setter" methods - methods that modify fields or objects referred to by fields. Make all fields final and private. Don't allow subclasses to override methods. The simplest way to do this is to d...

Usecase : Login to FB account import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; import org.testng.annotations.BeforeClass; import org.testng.annotations.Test; public class FaceBookLoginTest { private static WebDriver driver; HomePage homePage; ...

Defined within Another Class C++ Nested Class[ref] (needs a reference to enclosing class) class Outer { class Inner { public: Inner(Outer* o) :outer(o) {} private: Outer* outer; }; }; Java [non-static] Nested Class (aka Inner Class or Member Class...

Abstract Method declared without an implementation C++ pure virtual method virtual void eat(void) = 0; Java abstract method abstract void draw(); Abstract Class cannot be instantiated C++ cannot be instantiated; has at least 1 pure virtual method class AB {public: virtual void f() = ...

Note: examples written for PowerShell 5.1 You can create instances of Generic Classes #Nullable System.DateTime [Nullable[datetime]]$nullableDate = Get-Date -Year 2012 $nullableDate $nullableDate.GetType().FullName $nullableDate = $null $nullableDate #Normal System.DateTime [datetime]$aDa...

On every generated model classes there are no documentation comments added by default. If you want to use XML documentation comments for every generated entity classes, find this part inside [modelname].tt (modelname is current EDMX file name): foreach (var entity in typeMapper.GetItemsToGenerate&l...