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by: aiKeith |
last post by:
I have a really stupid problem I'm hoping to get help with.
The problem occurs if I delete rows from a dynamically built datatable.
ie:
CreateDataTable(); // creates the structure of the table
myTable.Rows.Delete();
now if I put that datatable back in a dataset and bind that ds to a grid, I
get the error "there is no row at position 216"
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by: solosnake |
last post by:
Whilst browsing Flipcode I noticed this code:
class CConsole: public I_TextOutput
{
public:
...
void Release() { delete this; }
...
};
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by: Christopher Benson-Manica |
last post by:
Is the following code legal, moral, and advisable?
#include <iostream>
class A {
private:
int a;
public:
A() : a(42) {}
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by: R.Z. |
last post by:
i'm using a class from some api that is said to automatically call its
destructor when its out of scope and deallocate memory. i create instances
of this class using "new" operator. do i have to explicitly call delete on
these instances when i no longer need them?
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by: gary |
last post by:
Hi,
We all know the below codes are dangerous:
{
int *p = new int;
delete p;
delete p;
}
And we also know the compilers do not delete p if p==NULL.
So why compilers do not "p = NULL" automatically after programs do "delete p"?
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by: relient |
last post by:
Question: Why can't you access a private inherited field from a base
class in a derived class? I have a *theory* of how this works, of
which, I'm not completely sure of but makes logical sense to me. So,
I'm here for an answer (more of a confirmation), hopefully.
First let me say that I know people keep saying; it doesn't work
because the member "is a private". I believe there's more to it than
just simply that...
Theory: You inherit,...
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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: 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: Medvedev |
last post by:
i see serveral source codes , and i found they almost only use "new"
and "delete" keywords to make they object.
Why should i do that , and as i know the object is going to be destroy
by itself at the end of the app
for example:
class test
{
public:
int x;
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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: 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: 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: 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: 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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