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In object-oriented computer programming, a null object is an object with no referenced value or with defined neutral (null) behavior.The null object design pattern, which describes the uses of such objects and their behavior (or lack thereof), was first published as "Void Value" [1] and later in the Pattern Languages of Program Design book series as "Null Object".
In software engineering, the module pattern is a design pattern used to implement the concept of software modules, defined by modular programming, in a programming language with incomplete direct support for the concept.
Nullable types are a feature of some programming languages which allow a value to be set to the special value NULL instead of the usual possible values of the data type.In statically typed languages, a nullable type is an option type, [citation needed] while in dynamically typed languages (where values have types, but variables do not), equivalent behavior is provided by having a single null ...
In other cases a Null value is returned if there is no explicit return statement: in Python, the value None is returned when the return statement is omitted, [4] while in JavaScript the value undefined is returned.
Based on the type of tags assigned to questions, the top eight most discussed topics on the site are: JavaScript, Java, C#, PHP, Android, Python, jQuery, and HTML. [ 17 ] History
PHP supports two special types: null, resource. The null data type represents a variable that has no value. The only value in the null data type is NULL. The NULL constant is not case sensitive. [30] Variables of the "resource" type represent references to resources from external sources. These are typically created by functions from a ...
This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.
JavaScript, TypeScript — Python Go, JSON, PHP, Ruby, language-agnostic mode A static analysis tool that helps expressing code standards and surfacing bugs early. It also has experimental support for eleven other languages. A CI service and a rule library is also available. Sider: 2021-02-02 No; proprietary — — — JavaScript, CoffeeScript ...