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Topic: Object copy

	Object (computer science) - Wikipedia, the free encyclopedia
		There, objects are still conceptual entities, but generally correspond directly to a contiguous block of computer memory of a specific size at a specific location.
		Objects exist only within contexts that are aware of them; a piece of computer memory only holds an object if a program treats it as such (for example by reserving it for exclusive use by specific procedures and/or associating a data type with it).
		A real-world example of an object would be "my dog", which is an instance of a type (a class) called "dog", which is a subclass of a class "animal".
	en.wikipedia.org /wiki/Object_(computer_science) (874 words)

	Object copy -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		In contrast, a shallow copy is a copy that may be associated to data shared by the original and the copy.
		In (The branch of engineering science that studies (with the aid of computers) computable processes and structures) computing, the result of shallow copying one object to another (A quantity that can assume any of a set of values) variable is two variables pointing to the same physical object in memory.
		Thus changing the object pointed to by one of the variables will also cause the contents of the other variable to change (since the same object in memory is being altered).
	www.absoluteastronomy.com /encyclopedia/o/ob/object_copy.htm (221 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		The object reference remains "valid" in the sense that it is not reused.
		Copy The copy_shallow operation copies the object itself, but with references to exactly the same objects as the copied object.
		Similarly, in copying a document, we don't want to follow references from the document to the authors, and thence to the families of the authors, and thence to the employers of the family members of the authors.
	www.omg.org /docs/1993/93-02-08.txt (3253 words)

	Object (Java 2 Platform SE v1.4.2)
		By convention, the object returned by this method should be independent of this object (which is being cloned).
		Typically, this means copying any mutable objects that comprise the internal "deep structure" of the object being cloned and replacing the references to these objects with references to the copies.
		Otherwise, this method creates a new instance of the class of this object and initializes all its fields with exactly the contents of the corresponding fields of this object, as if by assignment; the contents of the fields are not themselves cloned.
	java.sun.com /j2se/1.4.2/docs/api/java/lang/Object.html (2133 words)

	Object copy - TheBestLinks.com - Deep copy, Computing, Reference counting, Variable, ... (Site not responding. Last check: 2007-10-21)
		In computing, a deep copy is copy that contains the complete encapsulated data of the original object, allowing it to be used independently of the original object.
		In computing, the result of shallow copying one object to another variable is two variables pointing to the same physical object in memory.
		Shallow copies are common when reference counting objects.
	www.thebestlinks.com /Deep_copy.html (237 words)

	Creational Patterns: Creating Objects in an OO System (Site not responding. Last check: 2007-10-21)
		The lower-level objects are shared among copies of the object, so changing one of these objects affects all of the copies.
		Copy constructor One variant of the prototype is a copy constructor.
		This example produces a shallow copy—that is, it copies the object references from the original address to the duplicate.
	www.informit.com /articles/article.asp?p=26452&seqNum=6 (1189 words)

	JavaTechniques \| Low-Memory Deep Copy
		It would, of course, be possible to save the array and re-use it for subsequent object copies, though that may not be appropriate in some applications.
		If an object is * encountered that cannot be serialized (or that references an object * that cannot be serialized) an error is printed to System.err and * null is returned.
		If, for example, the buffer size is set to a value larger than the serialized size of the object being copied (effectively eliminating the memory advantages of the piped approach), the copy still takes nearly 50% longer than the single-threaded approach.
	javatechniques.com /public/java/docs/basics/low-memory-deep-copy.html (967 words)

	JavaTechniques \| Faster Deep Copy of Java Objects
		This means that the values of all of the origical object's fields are copied to the fields of the new object.
		The object that we are copying is large.
		If the objects you are copying tend to be of similar size, copying will be much faster if you initialize the buffer size and tweak the rate of growth.
	javatechniques.com /public/java/docs/basics/faster-deep-copy.html (2082 words)

	The Copy Algorithm (Site not responding. Last check: 2007-10-21)
		method is complicated by the fact that it needs to update all object references contained in the objects as it copies those objects.
		which is a reference to the copy of this object.
		After all the live objects have been copied from the active region to the inactive region, the regions exchange their roles.
	www.brpreiss.com /books/opus7/html/page428.html (416 words)

	The C++ Object Model
		In C++, an object is a region of storage with associated semantics.
		A copy constructor for a class is a constructor that can be called to copy an object of that class (it has a single argument of the corresponding type).
		A copy constructor is called when, for example, an argument object is passed by value to a function, or when an object is initialized with the value of another object.
	www.objs.com /x3h7/cplus.htm (3153 words)

	Performance
		For example, in the experiments conducted, when a client accesses an invalid copy and determines that validation is necessary, it communicates with the consistency cacher on the node on which the object was created.
		When a valid copy is added to the cache, cached object copies that are found to be mutually inconsistent with the incoming copy are invalidated and the local clock is updated.
		The actions required for caching an object copy are similar to the ones required for validation except that the client also informs the process cacher about it (one additional IPC).
	www.usenix.org /publications/library/proceedings/coots96/full_papers/kordale/node8.html (556 words)

	wksht10
		for new classes, and its action is to copy the member values of the object on the right side of the operator to those on the left side.
		If its parameter were passed by value instead of by reference, it would have to make a copy of the object for use inside the function - but it would have to call itself, the copy constructor, to do that.
		This is because a function call makes a copy of whatever data is passed when the data is call-by-value (the default), and for a class, this is done by calling the copy constructor for the class.
	www.cs.rpi.edu /~lallip/cs2/wksht10/wksht10.html (1668 words)

	Implementing New Classes and Objects
		The sense of a copy constructor is that it uses an existing object's attributes (data, state, instance variables) to initialize the new object being created.
		An object will be copied in two circumstances: (1) when a new object is declared and initialized using an existing object, and (2) when an object is passed as a parameter "by copy".
		When a copy is made of a Message object using the default copy constructor, the pointer (message), but not the string to which it points, is copied.
	people.cs.vt.edu /~kafura/cs2704/copy.html (831 words)

	Copy Method [Visio 2003 SDK Documentation] -- Visio (Site not responding. Last check: 2007-10-21)
		Copies a text range or hyperlink to the Clipboard.
		Shapes are copied to the center of the document.
		Shapes are copied to their original coordinate locations.
	msdn.microsoft.com /library/en-us/vissdk11/html/vimthCopy_HV01023274.asp (182 words)

	VBScript File Object Copy Method (Site not responding. Last check: 2007-10-21)
		Copies a specified file from one location to another.
		The destination where the file is to be copied.
		You should note, however, that the alternative method is capable of copying multiple files.
	gingermay.com /caspdoc/html/vbscript_file_object_copy_method.htm (79 words)

	The Semantics of Java Object Copy
		When objects contain nothing but primitive data it is harmless to make a bit-wise copy of the object, i.e.
		If we just copy the reference, then the first object and its copy will share the reference, and the two objects will not be truly independent.
		object that is the origin of all our geometry classes, and use it when creating our copy of the original object.
	courses.dce.harvard.edu /~cscie160/Clone.htm (1226 words)

	Copy (Site not responding. Last check: 2007-10-21)
		Copies the specified range of text to the clipboard.
		If the argument is a TextPoint object, Copy copies a string representing the text between the edit point and PointOrCount.
		If the argument is an integer, then Copy copies a string representing the specified number of characters following the edit point (counting one for each implied newline sequence at the end of each line).
	msdn.microsoft.com /library/en-us/vsintro7/html/vxmthCopyMethod.asp?frame=true (266 words)

	Inside Java Interfaces and Inner Classes (Site not responding. Last check: 2007-10-21)
		When you make a copy of a variable, the original and the copy are references to the same object.
		If all data fields in the object are numbers or other basic types, copying the fields is just fine.
		Objects are so paranoid about cloning that they generate a checked exception if an object requests cloning but does not implement that interface.
	www.informit.com /articles/article.asp?p=31110&seqNum=2 (849 words)

	TWIN General Utilities (Site not responding. Last check: 2007-10-21)
		Object pointer to the object to be copied.
		Object pointer to the object to be deleted.
		The resulting object is no longer a valid solid, but its faces can be displayed as closed polygons on display devices which cannot deal with holes, such as a Silicon Graphics IRIS workstation.
	www.cadlab.ecn.purdue.edu /cadlab/twin/TWIN_06_GenUtil.html (952 words)

	Application Development Guide --Directory Services
		Creates a new public object that is an exact, but independent, copy of an existing private object; certain exclusions and/or syntax conversion may be requested for the copy.
		Tests to determine if an object is an instance of a specified OM class (includes the case when the object is a subclass of that OM class).
		The copy is a service-generated public object that is accessible to the application program.
	www.umiacs.umd.edu /~jhu/DOCS/DCEDFS2.2/A3U2I/A3U2IM45.HTM (1227 words)

	Description of Objects in VPython
		Without any arguments, this results in creating a second object in the exact same position as the first, which is probably not what you want.
		Restriction: If the original object is within a frame, and the new object is on a different display, you must supply both a new display and a new frame for the new object (the new frame may be None).
		This is due to the restriction that an object may not be located within a frame that is in a separate display.
	vpython.org /webdoc/visual/options.html (436 words)

	Getting Started with Remoting in .NET
		When using MBV the copy of the object that is sent to the client is static, and does not reflect subsequent changes to the state of the object on the server.
		While that can be a significant task with large objects, after the copy is at the client, calls to it are all within the client's app domain and do not involve the transport mechanism at all.
		In contrast, MBR does not require a copy of the entire object to be transported to the client—but each and every time the client accesses the remote object it requires either a one-way or round-trip transport of information.
	www.devx.com /dotnet/Article/7002/0/page/2 (616 words)

	ipedia.com: Self programming language Article (Site not responding. Last check: 2007-10-21)
		Instead of having an "instance" of an object that is based on some "class", in Self you make a copy of an existing object, and change it.
		In this example the "bank account" object would not have the deposit and withdraw method, but would itself be cloned from an object that did.
		In this way many copies of the bank account object can be made, but we can still change the behaviour of them all by changing the slots in that root object.
	www.ipedia.com /self_programming_language.html (1588 words)

	COMP1405 - Notes 11 (Site not responding. Last check: 2007-10-21)
		Sometimes it is necessary to copy objects so that we can manipulate the data within it without destroying the original object.
		However, when objects are used as parameters, the value of the object is not passed in but in fact only a reference to it (i.e., a pointer to it) is passed in.
		Recall that a typical clone operation does a shallow copy in that if the object is composed of other objects, these other objects are shared with the original and the clone.
	www.scs.carleton.ca /~courses/COMP1005/notes/COMP1405_11 (2039 words)

	HTML Man Page for om_get (Site not responding. Last check: 2007-10-21)
		Note that this exclusion provides a means for determining an object's composition; that is, the type and syntax of each of its attribute values.
		The om_get() function creates a new public object (the copy) that is an exact, but independent, copy of an existing private object, the original parameter.
		For each attribute value in the original that is a string whose length exceeds an implementation-defined number, the copy parameter includes a descriptor that omits the elements (but not the length) of the string.
	www.lions.odu.edu /docs/dce/om_get.html (1019 words)

	Novell Documentation: Novell SecureLogin 3.51 - Copying, Exporting, and Importing SecureLogin Settings
		Copy settings to an object in the same context, a parallel context, or a subordinate context.
		Don't copy settings from an object in a subordinate context to an object in a superior (higher in the tree) context.
		When inheritable settings are copied, they become local settings on the object that the settings are copied to.
	www.novell.com /documentation/securelogin351/nsladm/data/aiy2v11.html (722 words)

	Appendix (Site not responding. Last check: 2007-10-21)
		Copy as Bitmap - copy object or selection of objects and render it as a bitmap on the clipboard.
		The difference between Copy as Bitmap/Paste and Copy/Paste as Bitmap is that in the first case it will copy-paste a bitmap with a solid background and in the second case you will get a Bitmap Object with a transparent background.
		Copy an object with the Style you like onto the clipboard Copy (Ctrl+C), then select another object and use Paste Attributes (Ctrl+Shift+V).
	www.mediachance.com /realdraw/help/appendix.htm (496 words)

	Flash Kit Community Forums - Roger: One Last Appeal For Multi-Object Copy/Paste (Site not responding. Last check: 2007-10-21)
		For a 24 FPS movie, create ten pairs of successive image and companion text objects with identical effects: for each, a 2-second move for the image and text together from bottom to center with ending acceleration, followed by slow, 4-second dropping of text to settle underneath image.
		Presently, the easiest way I have found to accomplish this is to copy the set of objects (which forces a copy of the effects as well).
		Approximate time: 2 to 10 minutes per object set, depending on complexity of project, number of objects, and frame insertion and scroll speed and granularity.
	www.flashkit.com /board/showthread.php?s=&threadid=220806 (887 words)

	Image Data Model Class : Image Data Model: _copy
		You must define the destination object with the LOADCLASS and INSTANCE functions before applying the _copy method.
		Because _copy creates another copy of the image in memory, you should delete the destination object when you are finished using it.
		A copy of the image is then scaled to a 48×48 fl-and-white image, and stored as a compressed TIFF file.
	www.uc.edu /sashtml/af/z0233708.htm (239 words)

	How to copy an object instead of geting the reference on MS Newsgroups
		Also your description "object it references cannot be changed" is incorrect.
		If you want to copy a class, you can't use the assignment operator.
		copies of all state information including other objects that are members of
	www.msnewsgroups.net /group/microsoft.public.dotnet.languages.csharp/topic3856.aspx (1871 words)

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