deep-copy

问题 This question already has answers here : How can I make a deepcopy of a function in Python? (6 answers) Closed 5 years ago . Is there a possibility to create real copies of python functions? The most obvious choice was http://docs.python.org/2/library/copy.html but there I read: It does “copy” functions and classes (shallow and deeply), by returning the original object unchanged; I need a real copy, because I might change some attributes of the function. Update: I'm aware of all the

问题 Is there any built-in function that allows me to deep copy an NSMutableArray ? I looked around, some people say [aMutableArray copyWithZone:nil] works as deep copy. But I tried and it seems to be a shallow copy. Right now I am manually doing the copy with a for loop: //deep copy a 9*9 mutable array to a passed-in reference array -deepMuCopy : (NSMutableArray*) array toNewArray : (NSMutableArray*) arrayNew { [arrayNew removeAllObjects];//ensure it's clean for (int y = 0; y<9; y++) { [arrayNew

问题 Say there is an EmployeeList that contains 5 Employee object. I want to perform a clone of that EmployeeList to make a new EmployeeList, and I am wondering how should I do that? So the following is my class Employee: public class Employee { private String name; private String ssn; private double salary; private String name() { return name; } private void name(String name) { this.name = name; } private String ssn() { return ssn; } private void ssn(String ssn) { this.ssn = ssn; } private double

问题 This question is related to another question I posted yesterday, although it is much more general in nature. Because of the thread I mentionned, I have been trying to determine what objects can be copied, pickled, marshaled and what objects cannot. While doing that, I stumbled on this puzzle: new_obj = copy.deepcopy(my_obj) function_that_uses_my_new_obj(new_obj) throws: function_that_uses_my_new_obj(new_obj) RuntimeError: Internal C++ object (Pyside.QtGui.QWidget) already deleted Now, since

问题 According the doc, it appears that the networkx.copy method does a deep copy of the graph. I'm most concerned about the statement This makes a complete copy of the graph including all of the node or edge attributes. Is this suggesting that it makes a copy of what the nodes contain as well? For example if I have the following class NodeContainer(object): def __init__(self, stuff): self.stuff = stuff # ..other class stuff g = networkx.DiGraph(): n1 = NodeContainer(stuff1) n2 = NodeContainer

问题 I would like to store some std::unique_ptr<my_type> into a std::vector . Since my_type provides a clone() method it's quite straightforward to make deep copies of my_type * . The point is how to extend std::unique_ptr preserving all its functionalities while adding the copy ctor and the assignment operator. Inheritance? Templace specialization? Could you please provide a code snippet? 回答1: The purpose of std::unique_ptr is for it to be unique i.e. it shouldn't be copyable. That's why they

问题 I need to take a couple of dynamically allocated arrays from one instance of a class and copy them into another instance. The problem is that I've been disallowed from changing the header file and there's no opportunity to overload the assignment operator. This is the header file for the Winery class. I'm not allowed to make any changes to this file: class Winery { public: Winery(const char * const name, const char * const location, const int acres, const int rating); virtual ~Winery(void);

问题 I have an object game of my Game.java class in my main class. I need to create a copy (game_copy) of game object such that when I make changes to the board of game_copy, the board of game does not get changed. I make this game_copy object as: Game game_copy = new Game() ; game_copy = game.clone() ; But still when I make changes to the board of game_copy, the board of game gets changed as they still share a reference. How do I sort out this problem? Here are my Game and rplayer classes that I

问题 thanks for taking the time to read this (sorry for the wall of text). Background Yes, this is a school project. No, I'm not asking you to do this for me. I've done all the work myself I've just been stumped by Java itself, not so much the problem. The project is about the basics of genetic programming. I randomly generate trees (which represent basic mathematical expressions), evaluate their fitness against data from the target function (x, y values), then manipulate the set by eliminating

问题 I want to make a deep copy method. I seeked help here the other day with this issue, but that was for a copy constructor. Now I need a regular method. I have the code created (nonworking), but I'm just not understanding it completely. public GhostList deepCopy(){ int length=this.getLength(); GhostList jadeed=new GhostList(); Ghost[] data = new Ghost[length]; for (int i=0;i<this.getLength();i++){ data[i] = new Ghost(); data[i].setX(this.ghosts[i].getX()); data[i].setY(this.ghosts[i].getY());