iclone

When passing parameters of reference type (multiple references are directed to the same memory address ). Any change will change all references. Sometimes we need to back up data before passing in parameters. One copy for user revocation. This uses the iclone interface. The following example shows how to use this interface. Psymbol implements the isymbol interface.Isymbol poriginalsymbol;Iclone pclonefathe

The problem of cloning is a very basic problem encountered in the development of the program, and once involved, it takes a lot of effort from the developer. should be resolved in a unified architectureThe Iclone interface has a pit. But some implementations also rely on it. So the removal or removal is not lost. But it can be implemented on its own to remove this dependency.The system should provide three functions:DeepcloneShallowcloneCopytoDeepclon

Prototype prototype mode is a creation design pattern, prototype mode allows an object to create another customizable object without knowing the details of how to create it, by passing a prototype object to the object to be created, The objects to be created are created by requesting the prototype object to copy them themselves.Above is a UML structure diagram of the prototype schema.Here is the code for the prototype pattern:#include "stdafx.h"#include #include usingNamespace Std;class

class used for inheritance./// Each class inherited from this class automatically supports the clone method./// This class implements the icloneable interface, and each object inherited from this object will/// Supports the icloneable interface./// Public abstract class baseobject: icloneable{/// /// Clone the object and return a reference to the cloned object/// /// Public object clone (){// First, create an instance of the specified typeObject newobject = activator. createinstance (this. GetT

{ // First, we create an instance of the specified type. Object Newobject = Activator. createinstance ( Typeof (T )); // We get the field array of the New Type instance. Fieldinfo [] fields = Newobject. GetType (). getfields (); Int I = 0 ; Foreach (Fieldinfo fi In Typeof (T). getfields ()){ // We determine whether the field supports the icloneable interface. Type iclonetype = Fi. fieldtype. getinterface ( " Icloneable " , True ); If (Iclonetype ! =

/// /// Every class that will be dirived from this class will support/// /// The class implements the interface /// For every object that will be derived /// From this object will support the /// Public abstract class baseobject: icloneable{/// /// Clone the object, and returning a reference to a cloned object./// /// /// Object. Public object clone (){// First we create an instance of this specific type.Object newobject = activator. createinstance (this. GetType ()); // We get the arra

iclone = (icloneable) Fi. getvalue (this ); // We use the clone method to set a new value for the field. Fields [I]. setvalue (newobject, iclone. Clone ()); } Else { // If this field supports the icloneable interface, set it directly. Fields [I]. setvalue (newobject, Fi. getvalue (this )); } // Check whether the object supports the ienumerable interface. If yes, // We also need to enumerate all i

object clone (){// First we create an instance of this specific type.Object newobject = activator. createinstance (this. GetType ()); // We get the array of fields for the new type instance.Fieldinfo [] fields = newobject. GetType (). getfields (); Int I = 0;Foreach (fieldinfo fi in this. GetType (). getfields ()){// We query if the fiels support the icloneable interface.Type iclonetype = Fi. fieldtype. getinterface ("icloneable", true ); If (iclonetype! = NULL){// Getting the icloneable interf

prototype mode. For example, if we want to obtain a dataset with the same structure as the existing one, we can use the clone method:Dim dsnew As DataSet = ds. CloneNote that there is also a method for copying data-related classes. Different from cloning, this method not only copies the structure of the object, but also copies the data contained in the object. For example, if we want to copy the structure and data of an existing dataset, this method is used:Dsnew = ds. CopyWhen using Clone, you

1. Deep copy and shallow copyA copy is usually referred to as copy or Clone (clone), and the copy of the object is a new object that duplicates an "exact" one from an existing object. Although they are all copied objects, different methods of replication, the new objects are not exactly the same, there are some differences within the object. There are two common copy methods, that is, deep copy and shallow copy, what is the difference between them? The Clone method for the

patterns, and the others are different evolution in different scenarios.2. Abstract Factory: Provides an interface to create a series of or related dependent objects without specifying their specific classes. It seems that the structure is very complex, but its structure is similar and well understood.3. Builder: Separates the component of a complex object from its representation so that the same component process can create different representations. 4. Prototype: Specify the kind of objects c

choose whether to use value type or reference type? The difference between the reference type and the value type is described. We can talk about the memory distribution and access efficiency. For value type and reference type, what are the default implementation methods of A. Equals (B? The default value type is equal. The reference type is to compare whether two references point to the same object. Why does. net not provide the default deep copy? If necessary, how

............ Isimplefillsymbol InterfaceG4 ............ Idisplaytransformation InterfaceG5 ............ Iscreendisplay InterfaceG6 ............ Itextsymbol InterfaceG7 ............ Irgbcolor InterfaceG8 ............ Isimplelinesymbol InterfaceG9 ............ Isimplefillsymbol InterfaceGa ............ Idisplaytransformation InterfaceGB ............ Iscreendisplay InterfaceGC ............ Itextsymbol InterfaceGD ............ Filesysteminfo Interface Esrisystem namespaceA1 ............ Iobjectcop

Arcscene + AE +Click to flash IscenegraphPSG = sc1.scenegraph; IsceneviewerPviewer = SC1. sceneviewer; IpointPPNT =New Pointclass(); ObjectPowner; ObjectPobject; PSG. Locate (sc1.sceneviewer, E. X, E. y,Esriscenepickmode. Esriscenepickall,True,OutPPNT,OutPowner,OutPobject ); IclonePpflashpoint; IclonePclone = (Iclone) PPNT; Ppflashpoint = pclone. Clone (); IpointPflashpoint = (Ipoint) Ppflashpoint; Pfl

1. Deep copy and light copy Copy is usually referred to as copy or clone. Copying an object is a new object that is "identical" from an existing object. Although all objects are replication objects, the new objects copied by different replication methods are not exactly the same, and there are some differences within the objects. There are two common copy methods: Deep copy and shallow copy. What is the difference between them? In msdn, the clone method of the

talk about the memory distribution and access efficiency. For value type and reference type, what are the default implementation methods of A. Equals (B? The default value type is equal. The reference type is to compare whether two references point to the same object. Why does. net not provide the default deep copy? If necessary, how to implement deep copy? Because deep copy involves the level of the copy, it is the level at which deep copy is required. In C #, you cannot directly

var srcobj = {A:1,B: {B1: ["Hello", "HI"],B2: "JavaScript"}};Console.log (Srcobj);var clone1 = Cloneobject (srcobj);function Cloneobject (SRC) {var clone = {};For (var item in SRC) {if (typeof (Src[item]) = = = ' object ') {if (Src[item] instanceof Array) {Clone[item] = [];for (var i=0,len=src[item].length; iClone[item][i] = Src[item][i];}} else {Clone[item] = Cloneobject (Src[item]);}} else{Clone[item] = Src[item];}}return clone;}Console.log (CLONE1)

Package (namespace) Java package: it is a lowercase noun that can be separated by vertices. For example, java. AWT. event; C # namespace: the first letter is capitalized. Generally, multiple words are combined into a class name. the first letter of each word must also be capitalized, for example, system. Data. sqlclient; Class Java and C # are the same: The first letter is capitalized. Generally, a class name is composed of multiple words, and the first letter of each word must be capita

1. Deep copy and light copyCopy is usually referred to as copy or clone. Copying an object is a new object that is "identical" from an existing object. Although all objects are replication objects, the new objects copied by different replication methods are not exactly the same, and there are some differences within the objects. There are two common copy methods: Deep copy and shallow copy. What is the difference between them? In msdn, the clone method of the

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