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by: Oystein Haare |
last post by:
I'm thinking about sort of a factory-system where the factories get
instanciated on program start (through a global object in the .cpp file),
and registers themselves with a singelton.
Is it a good idea to create global objects like that?
Maybe it won't work at all?
code:
class AbstractFactory { ...};
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by: Thomas Matthews |
last post by:
Hi,
I'm getting linking errors when I declare a variable in the
global scope, but not inside a function. The declarations
are the same (only the names have been changed...).
class Book
{
public:
Book()
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by: Kyle |
last post by:
Hi,
I have a library containing some global Variable. However, it seems
that when the library is a static lib the initialization of the global
var does not happen. I could not find any answer in BJ's C++ bible or
on the WEB so far.
Thanks!
If you run sbin (linking with .a), the output is 0 however if
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by: LP |
last post by:
After a code review one coworker insisted that global are very dangerous. He
didn't really give any solid reasons other than, "performance penalties",
"hard to maintain", and "dangerous". I think that I am using them
appropriate in class in question. One typical example: This class initiates
TCP session, keeps sending commands to the server app and gets messages and
codes back, message and code are stored in global variables to be preserved...
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by: Hans Greif |
last post by:
Hallo,
hello, i try to implement a global dataset - singleton based.
On www.bakterienforum.de i found a singleton implementation:
sealed class SingletonCounter
{
public int Counter = 0;
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by: David Colliver |
last post by:
Hi,
using c#, 1.1
I know that we are not supposed to use global variables etc. in c#
I am having a problem, but not sure how to resolve. I did have another post
here, but may have over confused things, so I will start afresh.
An example of what I want to do...
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by: dave |
last post by:
If I have a class that hold, for instance, user settings that should be
accessible to the entire program logic, what is a good paradigm to use?
In C++, I would have made it a global object, protected if necessary
for thread safety. In C#, of course, there are no global objects.
The Program object is static, so cannot contain object instances.
While I could store it in my main form pass it around, that seems
cumbersome. I could do a...
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by: Eric Lilja |
last post by:
As the topic says, I wanted to make a re-usable singleton class that
could create pointers to objects with non-trivial constructors. I came
up with this:
#ifndef SINGLETON_HPP
#define SINGLETON_HPP
template<typename T>
struct DefaultCreatorFunctor
{
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by: Tony Proctor |
last post by:
I need to create a process Singleton object for an ASP application, but I'm
having some odd issues
In my GLOBAL.ASA, I have an <OBJECTelement specifying the relevant ProgID
with RUNAT=Server and SCOPE=Application
However, although this works fine for some classes, I get a permission
denied error for classes from a particular DLL. The error response is:-
Active Server Pages error '8002802b'
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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...
|
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: 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: 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: 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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