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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".
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 ...
String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
In computing, a null pointer or null reference is a value saved for indicating that the pointer or reference does not refer to a valid object. Programs routinely use null pointers to represent conditions such as the end of a list of unknown length or the failure to perform some action; this use of null pointers can be compared to nullable types ...
PHP supports standard C/C++ style comments, but supports Perl style as well. Python The use of the triple-quotes to comment-out lines of source, does not actually form a comment. [ 19 ]
Aggregation of JavaScript source code in a single file reduces the number of requests made to the server while generating a web page. Whereas, always use an external JavaScript file for websites ...
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 ...
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