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Plain Old CLR Object is a play on the term plain old Java object from the Java EE programming world, which was coined by Martin Fowler in 2000. [2] POCO is often expanded to plain old C# object, though POCOs can be created with any language targeting the CLR. An alternative acronym sometimes used is plain old .NET object. [3]
C# makes use of reification to provide "first-class" generic objects that can be used like any other class, with code generation performed at class-load time. [29] Furthermore, C# has added several major features to accommodate functional-style programming, culminating in the LINQ extensions released with C# 3.0 and its supporting framework of ...
In Java, thread-local variables are implemented by the ThreadLocal class object. [15] ThreadLocal holds variable of type T, [15] which is accessible via get/set methods. For example, ThreadLocal variable holding Integer value looks like this:
Template use may increase object code size, because each template instantiation produces a copy of the template code: one for each set of template arguments, however, this is the same or smaller amount of code that would be generated if the code were written by hand. [77]
The messages that flow between computers to request services in a client-server environment can be designed as the linearizations of objects defined by class objects known to both the client and the server. For example, a simple linearized object would consist of a length field, a code point identifying the class, and a data value.
When a member function is called on an object, it invokes the member function with the same name on the object's class object, with the object automatically bound to the first argument of the function. Thus, the obligatory first parameter of instance methods serves as this; this parameter is conventionally named self, but can be named anything.
Programming languages that use finalizers include C++/CLI, C#, Clean, Go, Java, JavaScript and Python. Syntax varies significantly by language. In Java, a finalizer is a method called finalize, which overrides the Object.finalize method. [8] In JavaScript, FinalizationRegistry allows you to request a callback when an object is garbage-collected.
PHP supports an optional object oriented coding style, with classes denoted by the class keyword. Functions defined inside classes are sometimes called methods . Control structures include: if , while , do/while , for , foreach , and switch .