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by: Dave C. |
last post by:
Hi there,
We have some code that empties a table. Originally, the code used "delete
from", but I am told that this method was either too slow, or held a lock
for too long (this was a long time ago and I wasn't involved at that
point, so I'm not 100% sure exactly the nature of this problem). So the
code was changed to "truncate table". Now however, this table is being
replicated, so truncate table is no longer an option. I need to change...
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by: DrUg13 |
last post by:
In java, this seems so easy. You need a new object
Object test = new Object() gives me exactly what I want.
could someone please help me understand the different ways to do the
same thing in C++. I find my self sometimes, trying
Object app = Object();
Object *app = Object();
Object app = new Object();
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by: Ken |
last post by:
Hi. I know it is recommended that exceptions should be caught by
reference, but are there recommendations for how an exception should
be thrown? Or is it just a matter of throwing a type that is
compatiple with the catch. If that is the case, I suppose that if you
are catching a reference to exception e, the exception being thrown
better be an instance of e or a reference to an instance of e (ie., if
you threw a pointer to e and caught...
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by: Alfonso Morra |
last post by:
I have written the following code, to test the concept of storing
objects in a vector. I encounter two run time errors:
1). myClass gets destructed when pushed onto the vector
2). Prog throws a "SEGV" when run (presumably - attempt to delete
deleted memory.
Please take a look and see if you can notice any mistakes I'm making.
Basically, I want to store classes of my objects in a vector. I also
have three further questions:
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by: Xavier Décoret |
last post by:
Hi,
I long thought one could not delete a const pointer but the following
code compiles under g++ and visual net:
class Dummy
{
public:
Dummy() {}
~Dummy() {}
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by: TheSteph |
last post by:
Hi,
I need some Advice..
What is the best practice to execute multiple "nonQuery" SQL operations in
a transaction ?
1) Execute all in one "sqlCommand.ExecuteNonQuery();" :
sqlCommand.CommandText =
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by: mkaushik |
last post by:
Hi everyone,
Im just starting out with C++, and am curious to know how "delete
<pointer>", knows about the number of memory locations to free.
I read somewhere that delete frees up space assigned to <pointerby
"new". Does "new" create a list of pointer names and the size of the
memory array they point to? I also read that some compilers may store
the number of consec mem locations a pointer points to, just before the
first data...
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by: dasilva109 |
last post by:
Hi guys
I am new to C++ and need urgent help with this part of my code for a
uni coursework I have to submit by Thursday
//ClientData.h
#ifndef CLIENTDATA_H
#define CLIENTDATA_H
#include <string>
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by: dizzy |
last post by:
Hi
I wonder if this code is standard conformant and should work on all
conformant implementations (for some type T):
1: void* mem = ::operator new(sizeof(T));
2: T* p = new(mem) T(args...);
3: delete p;
line 2 I know it should be fine because global operator new should return
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by: Daniel Pitts |
last post by:
I have std::vector<Base *bases;
I'd like to do something like:
std::for_each(bases.begin(), bases.end(), operator delete);
Is it possible without writing an adapter? Is there a better way? Is
there an existing adapter?
Thanks,
Daniel.
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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: 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: 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: 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...
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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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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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