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Object | A Wisdom Archive on Object |  | Object A selection of articles related to Object |  |
| We recommend this article: Object - 1, and also this: Object - 2. |
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object, Object, Object - Etymology, Object (philosophy), Objecthood, Object group
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| ARTICLES RELATED TO Object | |  |  |  | Object: Encyclopedia II - Object lifetime - Destroying objectsIt is generally the case that after an object is used, it is removed from memory in order for efficiency and for other programs or more objects to take that object's place. In order for this to happen, a destruction method is called upon that object. Destroying an object will cause any references to the object to become invalid.
A destructor is a method called when an instance of a class is deleted, before the memory is deallocated. Note that in C++, a destructor can not be overloaded like a constructor can. It has to have no a ...
See also:Object lifetime, Object lifetime - Creating objects, Object lifetime - Creation methods, Object lifetime - Destroying objects, Object lifetime - Examples, Object lifetime - C++, Object lifetime - Java, Object lifetime - Objective-C, Object lifetime - Python Read more here: » Object lifetime: Encyclopedia II - Object lifetime - Destroying objects |
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|  |  |  | Object: Encyclopedia II - Object lifetime - Creating objectsIn a typical case, the process is as follows:
calculate the size of an object - the size is mostly the same as that of the class but can vary. When the object in question is not derived from a class, but from a prototype instead, the size of an object is usually that of the internal data structure (a hash for instance) that holds its slots.
allocation - allocating memory space with the size of an object plus the growth later, if possible to know in advance
binding methods - this is usually either left to the cl ...
See also:Object lifetime, Object lifetime - Creating objects, Object lifetime - Creation methods, Object lifetime - Destroying objects, Object lifetime - Examples, Object lifetime - C++, Object lifetime - Java, Object lifetime - Objective-C, Object lifetime - Python Read more here: » Object lifetime: Encyclopedia II - Object lifetime - Creating objects |
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| | |  |  |  | Object: Encyclopedia II - Foreign object - Common foreign objectsSome foreign objects are often used due to their proximity to the ring. These include folding chairs that ringside crew may appear in, as well as timekeeping bells, or in championship matches, the championship belt itself. In the WWE, it is also common to use announcing tables and television equipment as foreign objects. There have also been cases in which electric cords used by ringside camera crews are used by wrestlers to choke each other. Some have also considered running other wrestlers into walls, floors (other than the ring canvas), crowd barriers, exposed turnbuckles, or ...
See also:Foreign object, Foreign object - Common foreign objects, Foreign object - Foreign Object Matches Read more here: » Foreign object: Encyclopedia II - Foreign object - Common foreign objects |
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| |  |  |  | Object: Encyclopedia II - Objective-C - HistoryIn the early 1980s, common software engineering practice was based on structured programming. Structured programming was implemented in order to help "break down" programs into smaller parts, primarily to make them easier to work on as they grew increasingly large. However, as the problems being solved grew in size, structured programming became less useful as more and more methods had to be written, leading ...
See also:Objective-C, Objective-C - History, Objective-C - Syntax, Objective-C - Messages, Objective-C - Interfaces and implementations, Objective-C - Protocols, Objective-C - Dynamic typing, Objective-C - Forwarding, Objective-C - Categories, Objective-C - Posing, Objective-C - Other features, Objective-C - Objective-C++, Objective-C - Today, Objective-C - Analysis of the language Read more here: » Objective-C: Encyclopedia II - Objective-C - History |
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|  |  |  | Object: Encyclopedia II - Objective-C - TodayObjective-C today is often used in tandem with a fixed library of standard objects (often known as a "kit" or "framework"), such as OpenStep/Cocoa/GNUstep. These libraries often come with the operating system: the OPENSTEP libraries come with the OPENSTEP operating system and Cocoa comes with Mac OS X. One can however bypass the framework and inherit directly from the root object, Object, and create one's own functionality. The aforementioned libraries however implement NSObject, a more techno ...
See also:Objective-C, Objective-C - History, Objective-C - Syntax, Objective-C - Messages, Objective-C - Interfaces and implementations, Objective-C - Protocols, Objective-C - Dynamic typing, Objective-C - Forwarding, Objective-C - Categories, Objective-C - Posing, Objective-C - Other features, Objective-C - Objective-C++, Objective-C - Today, Objective-C - Analysis of the language Read more here: » Objective-C: Encyclopedia II - Objective-C - Today |
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| | | | |  |  |  | Object: Encyclopedia II - Immutable object - BackgroundIn most object-oriented languages, objects can be referred to using references. Some examples of such languages are Java, C++, and many scripting languages, such as Python and Ruby. In this case, it matters whether the state of object can vary when objects are shared via references.
If an object is known to be immutable, it can be copied simply by making a copy of a reference to it instead of copying the entire object. Because a reference (typically only the size of a pointer) is usually much smaller than the object itself, this results in ...
See also:Immutable object, Immutable object - Background, Immutable object - Implementation, Immutable object - Example, Immutable object - Usage Read more here: » Immutable object: Encyclopedia II - Immutable object - Background |
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| | | | | |  |  |  | Object: Encyclopedia II - Objective-C - SyntaxObjective-C is a very "thin" layer on top of C. Objective-C is a strict superset of C. That is, it is possible to compile any C program with an Objective-C compiler, which cannot be said of C++. Objective-C borrows its syntax from both C and Smalltalk. Most of the syntax, including the traditional function calls, is inherited from C, while the syntax for certain object-oriented features, including message-passing, was partially borrowed from Smalltalk.
See also:Objective-C, Objective-C - History, Objective-C - Syntax, Objective-C - Messages, Objective-C - Interfaces and implementations, Objective-C - Protocols, Objective-C - Dynamic typing, Objective-C - Forwarding, Objective-C - Categories, Objective-C - Posing, Objective-C - Other features, Objective-C - Objective-C++, Objective-C - Today, Objective-C - Analysis of the language Read more here: » Objective-C: Encyclopedia II - Objective-C - Syntax |
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|  |  |  | Object: Encyclopedia II - Immutable object - ImplementationImmutability does not imply that the object as stored in the computer's memory is unwriteable. Rather, immutability is a compile-time construct that indicates what a programmer should do, not necessarily what she can do (for instance, by circumventing the type system or violating const correctness in C or C++).
A technique which blends the advantages of mutable and immutable objects, and is supported directly in almost all modern hardware, is copy-on-write (COW). Using this technique, when a user asks the system to copy ...
See also:Immutable object, Immutable object - Background, Immutable object - Implementation, Immutable object - Example, Immutable object - Usage Read more here: » Immutable object: Encyclopedia II - Immutable object - Implementation |
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