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by: Tim Clacy |
last post by:
Is there such a thing as a Singleton template that actually saves
programming effort?
Is it possible to actually use a template to make an arbitrary class a
singleton without having to:
a) explicitly make the arbitrary class's constructor and destructor private
b) declare the Singleton a friend of the arbitrary class
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by: E. Robert Tisdale |
last post by:
Could somebody please help me with the definition of a singleton?
> cat singleton.cc
class {
private:
// representation
int A;
int B;
public:
//functions
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by: Jim Strathmeyer |
last post by:
So I'm trying to implement a singleton template class, but I'm getting a
confusing 'undefined reference' when it tries to link. Here's the code
and g++'s output. Any help?
// singleton.h
template <class T>
class Singleton : public T {
public:
static T * Instance();
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by: Alicia Roberts |
last post by:
Hello everyone, I have been researching the Singleton Pattern. Since the
singleton pattern uses a private constructor which in turn reduces
extendability, if you make the Singleton Polymorphic what sort of
problems/issues should be considered?
Also, I see that a singleton needs to be set up with certain data such as
file name, database URL etc. What issues are involved in this, and how
would you do this?
If someone knows about the...
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by: Ethan |
last post by:
Hi,
I have a class defined as a "Singleton" (Design Pattern). The codes are
attached below.
My questions are:
1. Does it has mem leak? If no, when did the destructor called? If yes, how
can I avoid it? Purify does not show it has mem leak.
// test if singleto class has mem leakage
#include <iostream>
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by: Harry |
last post by:
Hi ppl
I have a doubt on singleton class. I am writing a program below
class singleton
{
private:
singleton(){};
public:
//way 1
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by: Pelle Beckman |
last post by:
Hi,
I've done some progress in writing a rather simple
singleton template.
However, I need a smart way to pass constructor arguments
via the template.
I've been suggested reading "Modern C++ Design" or similar
books, but I feel there are full of clever guys here
who could help me out.
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by: Manuel |
last post by:
Consider the classic singleton (from Thinking in C++):
-----------------------------------------------------
//: C10:SingletonPattern.cpp
#include <iostream>
using namespace std;
class Singleton {
static Singleton s;
int i;
Singleton(int x) : i(x) { }
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by: weaknessforcats |
last post by:
Design Pattern: The Singleton
Overview
Use the Singleton Design Pattern when you want to have only one instance of a class. This single instance must have a single global point of access. That is, regardless of where the object is hidden, everyone needs access to it.
The global point of access is the object's Instance() method.
Individual users need to be prevented from creating their own instances of the Singleton.
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by: stevewilliams2004 |
last post by:
I am attempting to create a singleton, and was wondering if someone
could give me a sanity check on the design - does it accomplish my
constraints, and/or am I over complicating things. My design
constraints/environment are as follows:
1) Everything is single-threaded during static initialization (as in
prior to the open brace of main)
2) The environment may be multi-threaded during nominal program
execution (within {} of main)
3) I...
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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: 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...
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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: 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: 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: 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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