| |
by: Stephan Diehl |
last post by:
I have a question about metaclasses:
How would be the best way to "merge" different metaclasses?
Or, more precisely, what is the best way to merge metaclass functionality?
The idea is basicly the following:
One has several (metaclass) modules that implements an interesting feature.
Lets say, I have a metaclass L, that adds logging capabilities to all method
calls and another one, called P, that creates properties on the fly.
|
by: Andrew Koenig |
last post by:
Suppose I want to define a class hierarchy that represents expressions, for
use in a compiler or something similar.
We might imagine various kinds of expressions, classified by their top-level
operator (if any). So, an expression might be a primary (which, in turn,
might be a variable or a constant), a unary expression (i.e. the result of
applying a unary operator to an expression), a binary expression, and so on.
If I were solving...
|
by: arserlom |
last post by:
Hello I have a question about inheritance in Python. I'd like to do
something like this:
class cl1:
def __init__(self):
self.a = 1
class cl2(cl1):
def __init__(self):
self.b = 2
|
by: Tony Johansson |
last post by:
Hello Experts!!
Here we use multiple inheritance from two classes.We have a class named
Person at the very top
and below this class we have a Student class and an Employee class at the
same level.
There is a class TeachingAssistent that use multiple inheritance from both
Student and Employee.
There is a method named getName is class Person.
|
by: Tony Johansson |
last post by:
Hello Experts!
I have some questions about inheritance that I want to have an answer to.
It says "Abstract superclasses define a behavioral pattern without
specifying the implementation"
I know that an abstract class doesn't have any implementaion even if a
default implementatiion can be supplied for pure virtual methods.
What does it actually mean with saying that an Abstract superclasses define
a behavioral pattern?
|
| |
by: Quentin Huo |
last post by:
Hi:
C# doesn't support multiple inheritance but it supports interface.But I
think these ways are different.
For example, C++ supports multiple inheritance. I have two classess classA
and classB:
class classA(){
......
|
by: Tom Cole |
last post by:
I'm working on a small Ajax request library to simplify some tasks
that I will be taking on shortly. For the most part everything works
fine, however I seem to have some issues when running two requests at
the same time. The first one stops execution as the second continues.
If I place either an alert between the two requests or run the second
through a setTimeout of only 1 millisecond, they both work. You can
see a working example here:...
|
by: JoeC |
last post by:
I have been writing games and I also read about good programming
techniques. I tend to create large objects that do lots of things. A
good example I have is a unit object. The object controls and holds
everything a unit in my game is supposed to do. What are some some
cures for this kind of large object or are they OK because they
represent one thing. If not what are better ways to design objects
that behave the same way. Would it be...
|
by: Jess |
last post by:
Hello,
I've been reading Effective C++ about multiple inheritance, but I
still have a few questions. Can someone give me some help please?
First, it is said that if virtual inheritance is used, then "the
responsibility for initializing a virtual base is borne by the most
derived class in the hierarchy". What does it mean? Initializing
base class is usually done automatically by the compiler, but a
derived class can invoke the base...
|
by: Tony Johansson |
last post by:
Hello!
I wonder can somebody explain when is it suitable to
use these methods
OnKeyUp, OnKeyDown and OnKeyPress
because these raise an event. These are located in class UserControl.
If these raise an event how do I create an handler to catch these raised
events.
//Tony
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
| |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
|
