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• Class hierarchy problem in this social network model

  - by Gerenuk

  I'm trying to design a class system for a social network data model - basically a link/object system. Now I have roughly the following structure (simplified and only relevant methods shown) class Data: "used to handle the data with mongodb" "can link, unlink data and also return other linked data" "is basically a proxy object that only…

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• Should this immutable struct be a mutable class?

  - by ChaosPandion

  I showed this struct to a fellow programmer and they felt that it should be a mutable class. They felt it is inconvenient not to have null references and the ability to alter the object as required. I would really like to know if there are any other reasons to make this a mutable class. [Serializable] public struct PhoneNumber : ICloneable,…

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• class member access specifiers

  - by pdehaan

  I understand what the typical access specifiers are, and what they mean. 'public' members are accessible anywhere, 'private' members are accessible only by the same class and friends, etc. What I'm wondering is what, if anything, this equates to in lower-level terms. Are their any post-compilation functional differences between these beyond…

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• problem with PHP class function ()

  - by lusey

  hello this is my first question here and i hope you can help me .. I am trying to find a soloution of the towers of hanoi problem by three search ways (BFS-DFS-IDS) so I use "state" class whitch defined by 5 variables as here : class state { var $tower1 = array(); var $tower2 = array(); var $tower3 = array(); var $depth; var…

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• Mutable class as a child of an immutable class

  - by deamon

  I want to have immutable Java objects like this (strongly simplyfied): class Immutable { protected String name; public Immutable(String name) { this.name = name; } public String getName() { return name; } } In some cases the object should not only be readable but mutable, so I could add…

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• UiElement from abstract class

  - by plotnick

  I placed a control into a grid. let's say the control is derived from public class 'ButBase' which is derived in its turn from System.Windows.Controls.Button. The code normally compiles and app works just fine. But there's something really annoying. When you try to switch to xaml-design tab it will say 'The document root…

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• UiElement based on another class

  - by plotnick

  I placed a control into a grid. let's say the control is derived from public class 'ButBase' which is derived in its turn from System.Windows.Controls.Button. The code normally compiles and app works just fine. But there's something really annoying. When you try to switch to xaml-design tab it will say 'The document root…

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• Flash AS3 undefined property MouseEvent in document class

  - by Lee

  Hi guys, this is my first time trying to use document classes in AS3 and im struggling. I am trying to add event listeners to a 2 levels deep movie clip, waiting for a click however i am getting the following error. ERROR: Access of undefined property MouseEvent package { import flash.display.MovieClip; import…

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• Perl OO frameworks and program design - Moose and Conway's inside-out objects (Class::Std)

  - by Emmel

  This is more of a use-case type of question... but also generic enough to be more broadly applicable: In short, I'm working on a module that's more or less a command-line wrapper; OO naturally. Without going into too many details (unless someone wants them), there isn't a crazy amount of complexity to the system, but…

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• objective-c Derived class may not respond to base class method

  - by zadam

  Hi, I have derived from a 3rd party class, and when I attempt to call a method in the base class, I get the x may not respond to y compiler warning. How can I remove the warning? Repro: @interface ThirdPartyBaseClass : NSObject {} +(id)build; -(void)doStuff; @end @implementation ThirdPartyBaseClass +(id) build{ …

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• C Number to Text problem with ones and tens..

  - by Joegabb

  #include<stdio.h> #include<conio.h> main() { int ones,tens,ventoteen, myloop = 0; long num2,cents2,centeens,cents1,thousands,hundreds; double num; do{ printf("Enter a number: "); scanf("%lf",&num); if(num<=10000 || num>=0) { if (num==0) { printf("\t\tZero"); } num=(num*100); num2=…

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• lower-case 'c' key not working in bash

  - by gavin

  This is a bit of a strange one. I'm running Ubuntu 12.04. It's been working well but today, I ran into a hell of strange phenomenon. I can no longer type a lower-case 'c' in bash. At first I thought it was a misconfiguration for the gnome terminal but I tried both a stock xterm and directly at the console…

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• UML Class Relationships

  - by 01010011

  Hi, I would like to confirm whether I am on the right track when identifying common UML class relationships. For example, is the relationship between: 1 a stackoverflow member and his/her stackoverflow user account categorized as a composition relationship or an aggregation relationship? At first I…

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• Accessing Class Variables from a List in a nice way in Python

  - by Dennis

  Suppose I have a list X = [a, b, c] where a, b, c are instances of the same class C. Now, all these instances a,b,c, have a variable called v, a.v, b.v, c.v ... I simply want a list Y = [a.v, b.v, c.v] Is there a nice command to do this? The best way I can think of is: Y = [] for i in X …

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• Using typedefs from a template class in a template (non-member) function

  - by atomicpirate

  The following fails to compile (with gcc 4.2.1 on Linux, anyway): template< typename T > class Foo { public: typedef int FooType; }; void ordinary() { Foo< int >::FooType bar = 0; } template< typename T > void templated() { Foo< T >::FooType bar = T( 0 ); } int…

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• Difficulty with MooTools Class.extend

  - by Erin Drummond

  Consider the following code: var Widget = new Class({ Implements: [Options], options: { "name" : "BaseWidget" }, initialize: function(options) { alert("Options are: " + JSON.stringify(options)); //alerts "Options are: undefined" …

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• Initiate a PHP class where class name is a variable

  - by ed209

  I need some help with an error I have not encountered before and can't seem to find anywhere. In a PHP mvc framework (just from a tutorial) I have the following: // Initiate the class $className = 'Controller_' . ucfirst($controller); if (class_exists($className)) { $controller =…

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• Generate java class and call it's method dynamically

  - by Jacob

  package reflection; import java.io.*; import java.lang.reflect.*; class class0 { public void writeout0() { System.out.println("class0"); } } class class1 { public void writeout1() { System.out.println("class1"); } } class class2 { public void writeout2() {…

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• Initializing PHP class property declarations with simple expressions yields syntax error

  - by user171929

  According to the PHP docs, one can initialize properties in classes with the following restriction: "This declaration may include an initialization, but this initialization must be a constant value--that is, it must be able to be evaluated at compile time and must not depend on…

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• Accessing variables of an object of a particular class through a different class within the construc

  - by Haxed

  class Student { private String name; public Student(String name){ this.name = name; } public String getName(){ return name; } } class StudentServer { public StudentServer(){ Student[] s = new Student[30]; s[0] = new…

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• Jquery binding event on selected class

  - by Andrew

  Is it achievable in jquery to bind an event to a group of control that has certain class? It seems to me, it can't. I google a bit and all that came up are nothing to do with events. Here's how my code looks - $('.numonly').bind('keypress',function(event){ if…

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• I want to get the value from one class (SearchTableViewController.m) to another class (HistoryTableV

  - by ahmet732

  #import <UIKit/UIKit.h> @class SearchDetailViewController; @interface SearchTableViewController : UITableViewController <UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource>{ IBOutlet UITableView *myTableView; NSMutableArray…

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• class not found when running

  - by captfrank

  I'm getting "could not find class" error when I run my app. Understand that copulation and execution path different but I followed the recommendations of another question to create a sub dir under my project of lib and put the jar there but still no…

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• Why you can create class self intance in class's main method

  - by Haite

  Why you can do this in C#? class Test { static void Main() { Test test = new Test(); } }

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• MyClassBase or BaseMyClass?

  - by Vasiliy Borovyak

  What is the better way to name base abstract classes? I still can't decide where to put 'Base' word. Should it be 'BaseMyClass' or 'MyClassBase'? How do you name those and why?

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