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by: Dan Perl |
last post by:
There is something with initializing mutable class attributes that I am
struggling with. I'll use an example to explain:
class Father:
attr1=None # this is OK
attr2= # this is wrong
def foo(self, data):
self.attr1=data
self.attr2.append(data)
The initialization of attr1 is obviously OK, all instances of Father
redefine it in the method foo. But the initialization of attr2 is wrong
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by: Bryan Parkoff |
last post by:
I have created three classes according to my own design. First class
is called CMain. It is the Top Class. Second class and third class are
called CMemory and CMPU. They are the sub-classes.
Two sub-classes have the relationship to communicate back and forth
through this pointer. The pointer is responsible inside Top class for
allocating and deallocating two sub-classes.
CMemory class is responsible to allocate and deallocate memory...
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by: Steven T. Hatton |
last post by:
The following may strike many of you as just plain silly, but it represents
the kind of delelima I find myself in when trying to make a design
decision. This really is a toy project written for the purpose of learning
to work with C++. It therefore makes some sense for me to give the
situation the amount of consideration presented below. To be quite honest,
I'm amazed at the amount there is to say about such a seemingly simple...
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by: fernandez.dan |
last post by:
I'm still learning how to use Object Oriented concepts. I'm have a
basic question dealing with design. I have two classes that deal with
I/O pertaining to network and usb that inherit from an abstract parent
with four basic functions: Open, Read, Write, and Close.
// Note alot of the stuff has been left out
// just to give a basic picture
class IO
{
public:
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by: Alfonso Morra |
last post by:
if I have a class template declared as ff:
(BTW is this a partial specialization? - I think it is)
template <typename T1, myenum_1 e1=OK, my_enum_2=NONE>
class A {
public:
A();
virtual ~A() ;
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by: dimension |
last post by:
If my intentions are to create objects that encapsulates data rows in a
table, is it better to use a Struct or Class? Based on what i read, if my
objects will simply have get and set methods, Struct is may be better...but i
am looking for some advise from the experts on this?
Assumptions: it is possible for some operations, i may have 8000 to 10000
(or more) objects instantiated.
what are some considerations in designing a system that...
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by: rodchar |
last post by:
Hey all,
I'm trying to understand Master/Detail concepts in VB.NET. If I do a data
adapter fill for both customer and orders from Northwind where should that
dataset live?
What client is responsible for instantiating the orders class? Would it be
the ui layer or the master class in the business layer?
thanks,
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by: Tony |
last post by:
I'm working with GUI messaging and note that MFC encapsulates
the message loop inside of a C++ class member function. Is this
somehow inherently less robust than calling the message loop
functions within main? (It just doesn't "feel" right to me).
Example 1:
class MyProg
{
public:
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by: JoeC |
last post by:
I have a question about designing objects and programming. What is the
best way to design objects? Create objects debug them and later if you
need some new features just use inhereitance. Often times when I
program, I will create objects for a specific purpose for a program and
if I need to add to it I just add the code.
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by: Brad Pears |
last post by:
Here is a simple OO design question...
I have a Contract class. The user can either save an existing contract or
they start off fresh with a blank contract, fill in the data and then save a
"new" contract.
I have a method in my contract class called "Save" which is called like
this...
dim oContract as new Contract
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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: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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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...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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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...
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