| |
by: Uwe Mayer |
last post by:
Hi,
I want to create a copy of an object from out of its base class:
class A(object):
def copy(self):
....
class B(A):
....
|
by: franky.backeljauw |
last post by:
Hello,
I am wondering which of these two methods is the fastest: std::copy, which
is included in the standard library, or a manually written pointer copy?
Do any of you have any experience with this?
I would think that the library function std::copy would perform optimally,
as it is a library function, and therefore the writers of this function
would know best how to optimize it ... but some tests seem to indicate
that my pointer copy...
|
by: Kelly Mandrake |
last post by:
I've implemented a class with operator+ overloaded and I also provided
my own copy constructor; The problem is my copy constructor is being
called twise and I dont understand why. I believe the copy constructor
is being called when I add the two class objects. But if this is so,
then why because I have overloaded the + operator should I not get the
result from that and not from copy constructor?
I have the following:
int main(int...
|
by: MSR |
last post by:
I have a couple of questions.
1. Copy Constructor.
class A {
private:
int a1;
double d1;
char *ptr;
|
by: rdc02271 |
last post by:
Hello!
Is this too crazy or not?
Copy constructor: why can't I copy objects as if they were structs?
I have a set of simple objects (no string properties, just integers,
doubles) and I have to copy the same object millions of times.
So instead of writing in the copy constructor
property1=SourceObject.property1 can't I use memory copy functions to
do this faster?
Is this too stupid?
By the way, I'm a C++ newbie! But don't go easy on me...
|
| |
by: Mark E. Fenner |
last post by:
Hello all,
I have a code where my inner loop looks like:
allNew =
for params in cases:
newObj = copy(initialObject)
newObj.modify(params)
allNew.append(newObj)
return allNew
|
by: saxenavaibhav17 |
last post by:
what is Deep Copy, Shallow copy and Bitwise copy, Memberwise copy?
and what is the difference between them?
pls help
vaibhav
|
by: shuisheng |
last post by:
Dear All,
I am wondering how the default copy constructor of a derived class
looks like. Does it look like
class B : public A
{
B(const B& right)
: A(right)
{}
|
by: Victor Bazarov |
last post by:
Hello,
Take a look at this program:
-----------------------------------
class B
{
B(const B&);
B& operator=(const B&);
public:
B(int);
|
by: =?ISO-8859-1?Q?Marcel_M=FCller?= |
last post by:
Hi,
is there a way to avoid the automatic copy constructor generation. I do
not want the object to be non-copyable. I simply do not want that
copying is done by the default copy constructor. But there is a
constructor that accepts the base class. This one should be used for
copying.
In fact i have a set of classes with a common abstract base. The
implementations do not have own data members. They only implement
|
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: 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: 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...
|
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: 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();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
| |
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
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
