Hello I'm trying a few different approaches to Javascript inheritance at the moment. I have the following code: ('borrowed' from http://www.kevlindev.com/tutorials/javascript/inheritance/index.htm) KV = {}; KV.extend = function(subClass, baseClass) { function inheritance() {} inheritance.prototype = baseClass.prototype...
Hello guys, I am new to JavaScript OOP. Can you please explain me what the difference is between the following blocks of code. I tested and both blocks work. What's the best practice and why? First block: function Car(name){ this.Name = name; } Car.prototype.Drive = function(){ document.write("My name is " + this.Name + " and...
Hi all, I have written the following code: @Entity @Table(name="person") @Inheritance(strategy=InheritanceType.JOINED) public class Person { private Long id; protected String email; private String firstName; private String lastName; @Id @GeneratedValue(strategy = GenerationType.AUTO) public Long getId() {...
I have a design question. When writing an application where there are several components that share some attributes, and differ in others both in terms of GUI (windows forms) and back end, how would one theoretically approach this? For example, I have an application where I have 4 different types of a product. The forms for entering pro...
Hi all, I'm looking for a way to not reference the class name, yet still achieve the desired effect. I can't do ITypedList.GetType() because it is an Interface. public class DerivedList : ITypedList ... public PropertyDescriptorCollection GetItemProperties() { return TypeDescriptor.GetProperties(typeof(DerivedList)); } ...
Hi, I have two questions. 1. Why is workflow class "SEALED" class? Is it a bad practice to inherit workflows? 2. The while activity is slow. IE.: I put 3 activities on a seqential wf in this order... Code_activity1 While_activity Code_activity2 (in the while activity) Code_activity1 - sets an int counter to 33320. While_activity ...
In Java, do class objects have the same heritance relations as the classes they represent? ...
Let's assume this class in C#: public class LimitedList<T> : List<T> { private int _maxitems = 500; public void Add(T value) /* Adding a new Value to the buffer */ { base.Add(value); TrimData(); /* Delete old data if lenght too long */ } private void TrimData() { int num = Math.Max(0, ba...
Let's start from another behavior: even if you declare method/variable as private, another instance of the same class can access it. It's OK I can live with it. I call these class private and not instance private. Now the question part: For example, in runtime I want to be able to check that all String variables in this class are not nu...
I am writing an application that required the development of an engine for handling data, but the engine had to be replaceable by another depending on the customers' need. Since each customer had very different needs, I wanted to make each engine separated from the others so we could only deliver the application with the engines the cust...
What is the reason that in Java, a member with a "protected" modifier can not only be accessed by the same class and by subclasses, but also by everyone in the same package? I am wondering about language design reasons, not actual applications (e.g., testing) ...
I have a class with a member m_preferences (a vector containing assocation between word and features). In this class the m_preferences is not static and thus any instance of the class has its specific m_preferences. class Base{ private: Preferences m_preferences; public: ... } I then created a derived class where m_preference...
Consider this - a base class A, class B inheriting from A, class C inheriting from B. What is a generic way to call a parent class constructor in a constructor? If this still sounds too vague, here's some code. class A(object): def __init__(self): print "Constructor A was called" class B(A): def __init__(self): ...
My application contains several forms which consist of a strongly typed datagridview, a strongly typed bindingsource, and a strongly typed table adapter. I am using some code in each form to update the database whenever the user leaves the current row, shifts focus away from the datagrid or the form, or closes the form. This code is th...
I notice that in the generated SWIG wrappers for a given set of classes, SWIG keeps a list of C-string representations of all the parent classes from which that class inherits. (char ** base_names). I know there is a function swig_type(some_variable) that will return a string representation of a given variable's data type. Is there al...
The problem is that I need a little extra functionality to an object of a class that I can’t change (I’m trying to add data binding support). The best solution that I can think of is to just write a derived class with this functionality. So I can use objects of this class instate. So now the problem is, how do I initialize the objects o...
I have an object with a field that can be a number of object types. This object is encoded in a single table with a discriminator column for the field's subtypes. Each of these subtypes have their fields mapped to a column in the parent objects table. I cannot seem to model this in hibernate. The code bellow will return null for getSubfi...
How do you serve Cheetah in production? Guys can you share the setup on how to precompile and serve cheetah in production Since we dont compile templates in webpy it is getting upstream time out errors. If you could share a good best practise it would help * Jeremy [email protected] wrote: For a production site, I use Cheet...
Good day I have a complex model (ddd) which i want to map using ibatis. My model is as follows: class A { int id; String title; List <B> b; } abstract class B { int id; String title; List <C> f; int type; } class BA extends B { BA() { setType(1); } } class BB extends B { BB { setType(2); } } My current XML Map...
The claim that it is a mistake ever to use a standard C++ container as a base class surprises me. If it is no abuse of the language to declare ... // Example A typedef std::vector<double> Rates; typedef std::vector<double> Charges; ... then what, exactly, is the hazard in declaring ... // Example B class Rates : public std::vector<...