Tutorial by Topics: let

A singleton is a class that only ever has one single instance. For more information on the Singleton design pattern, please refer to the Singleton topic in the Design Patterns tag.

The DELETE statement is used to delete records from a table. DELETE FROM TableName [WHERE Condition] [LIMIT count]

Nullable<int> i = 10; int? j = 11; int? k = null; DateTime? DateOfBirth = DateTime.Now; decimal? Amount = 1.0m; bool? IsAvailable = true; char? Letter = 'a'; (type)? variableName Nullable types can represent all the values of an underlying type as well as null. The syntax T? i...

The singleton pattern has the goal to allow only one instance of a class to exists at any given time. Preventing the direct instantiation via constructor is usually prevent by making it private. However, this is not possible in As3 and thus other ways to control the number of instances have to be...

DELETE [ LOW_PRIORITY ] [ QUICK ] [ IGNORE ] FROM table [WHERE conditions] [ORDER BY expression [ ASC | DESC ]] [LIMIT number_rows]; /// Syntax for delete row(s) from single table ParameterDetailsLOW_PRIORITYIf LOW_PRIORITY is provided, the delete will be delayed until there are no proc...

Valet is a development environment tailor made for macOS. It abstracts away the need for virtual machines, Homestead, or Vagrant. No need to constantly update your /etc/hosts file anymore. You can even share your sites publicly using local tunnels. Laravel Valet makes all sites available on a *.dev...

Leaflet is an open-source JavaScript library for creating interactive maps. VersionRelease Date1.0.32017-01-231.0.22016-11-211.0.12016-09-301.02016-09-270.72013-11-180.62013-06-260.52013-01-170.42012-07-300.32012-02-130.22011-06-170.12011-05-16

While there are schools of thought which make compelling arguments why unconstrained use of Singletons is a bad idea, e.g. Singleton on gameprogrammingpatterns.com, there are occasions when you might want to persist a GameObject in Unity over multiple Scenes (e.g. for seamless background music) wh...

The Singleton design pattern is sometimes regarded as "Anti pattern". This is due to the fact that it has some problems. You have to decide for yourself if you think it is appropriate to use it. This topic has been discussed several times on StackOverflow. See: http://stackoverflow.c...

A Singleton is designed to ensure a class only has one instance and provides a global point of access to it. If you only require one instance or a convenient global point of access, but not both, consider other options before turning to the singleton. Global variables can make it harder to reason...

Just make sure you read this thread ( What is so bad about singletons? ) before using it.

A Servlet is a Java application programming interface (API) running on the server machine which can intercept requests made by the client and can generate/send a response accordingly. A well-known example is the HttpServlet which provides methods to hook on HTTP requests using the popular HTTP met...