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by: Gerry Sutton |
last post by:
Hi All!
I have noticed a strange behavior when using a constant identifier to
initialize an instance list variable in a base class and then trying to
modifying the list in subclasses by using either the list.extend method or
even by having the subclass create a whole new list in the variable.
The following example illustrates the situation.
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by: Jeroen Smits |
last post by:
To Microsoft or other people who are interested, I have a feature request:
I would really like to have an option to 'hide' a property or method from an
inherited class. For example when I create a subclass and supply a default
value for a property. Currently I create a new property, using the new
keyword, and only supply the get accessor witch will always return the
predefined value. But I would really like to be able to hide it...
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by: Alexis |
last post by:
How can I subclass a treeview control to add columns to it?
Thanks,
Alexis
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by: Lou Pecora |
last post by:
I've been scanning Python in a Nutshell, but this seems to be either
undoable or so subtle that I don't know how to do it.
I want to subclass a base class that is returned from a Standard Library
function (particularly, subclass file which is returned from open). I
would add some extra functionality and keep the base functions, too.
But I am stuck.
E.g.
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by: s.lipnevich |
last post by:
Hi All,
Is anything wrong with the following code?
class Superclass(object):
def __new__(cls):
# Questioning the statement below
return super(Superclass, cls).__new__(Subclass)
class Subclass(Superclass):
pass
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by: damacy |
last post by:
hi, there. i have a problem writing a program which can obtain ip
addresses of machines running in the same local network.
say, there are 4 machines present in the network; , , and
and if i run my program on , it should be able to find "host names"
and "ip addresses" of the other machines; , and ?
i have read some threads posted on this group, however, they only work
for localhost, not the entire network.
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by: Stuart |
last post by:
Hello,
We are trying to subclass the ListView control and have a collection of a
class as the Items. Our implementation works at runtime. However at design
time if the user adds elements, we can not see them in the visual studio
designer.
Any help would be appreciated. The class is NameAndId and the collection
property VariableNamesAndIds. We marked it with the
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by: Me |
last post by:
I need to be able to acces non-virtual members of sublcasses via a
base class pointer...and without the need for an explicit type cast.
I thought a pure virtual getPtr() that acts as a type cast would solve
the problem, but it appears not to.
I need this functionality to make object serialization a reality. Having
to explicitly cast each deserialized object to its original type defeats
the purpose of my serializing the blasted things in...
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by: Brian Gaze |
last post by:
I have created a ListView control and have bound this to a datasource.
Within the ItemTemplate of the ListView I have added another ListViewControl
which is databound in the code behind. The idea is that when clicking on the
"Show details" button the ListView for the appropriate row binds in the
codebehind and displays the detail data for the selected row. I did
something similar with a gridview control previously, but want to be able to...
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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...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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...
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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...
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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,...
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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...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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