I am trying to write a life simulation in python with a variety of animals. It is impossible to name each instance of the classes I am going to use because I have no way of knowing how many there will be. So, my question: How can I automatically give a name to an object? I was thinking of creating a "Herd" class which could be all the...
My problem is thus: I need a way to ensure only one given class can instantiate another. I don't want to have to make the other a nested inner class or something dumb like that. How do I do this? I forget offhand. ...
hello I want all the Method-ClassName from namespace like i have system.windows.Forms wehen in visual studio we rigt system.windows.Forms. it will suggest box of all the related method,class,enum extra i need to fetch the same ,how can i do that in C# Thanks ...
When WSDL importer wizard generates the interfaces, all properties have the Index option, but reading the code and the InvokeRegistry unit, I can't found what is that for, anyone know if it is really necessary? Like this Login = class(TRemotable) private [...] published property User: string Index (IS_OPTN) read GetUser ...
I have a type which I consider use it as struct. It represents single value It is immutable But the problem is, it has 6 fields of int. So which solution I should use for this type? keep using struct? change to class? or pack 6 integers into an array of int, so it has only one field EDIT Size of struct with 6 integer fields is ...
I just finished reading this article on the advantages and disadvantages of exceptions and I agree with the sentiment that Try-Catch blocks should not be used for "normal" control-flow management (don't use them like a goto). However, one author made (good) points about Maintainability and especially Performance that made me wonder abou...
Hi I am modeling a class diagram. An attribute of a class is an enumeration. How do i model this? Normally you do something like this: - name : string But how to do this with an enum? Thnx in advance :) ...
I need help in designing my PHP classes where I need to extend from multiple classes. I have a general class, Pagination.php that does all sort of pagination and sorting. All other classes will use this for pagination. To make my life easier, I made a class generator that generates a class from MySQL table. All the properties, getters,...
I have code similar to this in my application: class A { public: int b; } class C { public: int d; } void DoThings (void *arg1, MYSTERYTYPE arg2); A obj_a; C obj_c; DoThings(&obj_a, &A::b); DoThings(&obj_c, &C::d); The question is - What should MYSTERYTYPE be? neither void* nor int work, despite the value &A::b being printed j...
I am using Kohana and just found this piece of code in their autoloading method // Class extension to be evaluated $extension = 'class '.$class.' extends '.$class.'_Core { }'; // Start class analysis $core = new ReflectionClass($class.'_Core'); if ($core->isAbstract()) { // Make the extension abstract $extension = 'a...
I'm faced with a design decision that doesn't smell to me, but gives me pause. Take a look at the following code sample: public interface IGenerator { ///<summary> /// Combines two generators; performs magic as well /// </summary> BaseGenerator Combine(BaseGenerator next); ///<summary> /// Does what a generator does. ///...
I have the following situation I think would be best to show in sample program code. I have a Java class that extends JPanel. In this class are two objects which are two more JPanels. In one of the JPanel objects is a JTable object. I added a listener to this JTable that detects a double click. When it detects a double click, I want...
For domain entities, should property names be prefaced with the entity name? I.E. my class Warehouse has a property WarehouseNumber. Should that property be named WarehouseNumber or simply Number? Thoughts? ...
Is there any advantage over using a class over a struct in cases such as these? (note: it will only hold variables, there will never be functions) class Foo { private: struct Pos { int x, y, z }; public: Pos Position; }; Versus: struct Foo { struct Pos { int x, y, z } Pos; }; Similar questions: http://stackov...
For my current project I want to be able to load some classes from a dll (which is not always the same, and may not even exist when my app is compiled). There may also be several alternative dll's for a given class (eg an implementation for Direct3D9 and one for OpenGL), but only one of the dlls will be loaded/used at any one time. I ha...
I'm trying to pass an instance of a class between two separate classes, like the following. //classes public class A { public string name; public string data; } public class B : MarshalByRefObject { public A _a; } public class C : MarshalByRefObject { public A _a; } //main program static void Main(string[] args) { B _b = ...
In a C++ physics simulation, I have a class called Circle, and Square. These are Shapes, and have a method called push(), which applies force to it. There is then a special case of Circle, call it SpecialCircle, in which push() should exhibit slightly different properties. But in fact, there is also SpecialSquare() which should exhibit...
am working on a web app in PHP that requires users to register and login with their credentials. However, i am using the singleton pattern in all my PHP class files. I have something bothering my mind that i would like to clarify. For instance, When the application goes live and we have several users on the site at the same time, doing...
I want to assign a class attribute via a string object - but how? Example: class test(object): pass a = test() test.value = 5 a.value # -> 5 test.__dict__['value'] # -> 5 # BUT: attr_name = 'next_value' test.__dict__[attr_name] = 10 # -> 'dictproxy' object does not support item assignment ...
I'm currently writing a C#-class in my ASP.NET (3.5) application to handle all database-queries. Some of the methods are there to make a select-query to the database. Inside the method i simply have a SqlDataReader r = command.ExecuteReader(); to fetch the data. I now want r to be returned by the method, but when i close the database-co...