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by: mark4asp |
last post by:
What are the best methods for using global constants and variables?
I've noticed that many people put all global constants in a file and
include that file on every page. This is the best way of doing it - is
it not? Once the application has loaded the page it is cached and is
immediately available for other pages.
With global variables - the best thing to do would be to use
application variables - so long as there weren't too many...
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by: Matt |
last post by:
Greetings,
What are people's thoughts on global variables in C++?
Why are we taught not to use them in programming?
Is it true that if you are running two copies of the C program one
copy can overwrite another copies global variable?
I know that you could overwrite a value in a global variable from a
function, but you could also do that if you pass the variable in and
then out again... so how is that any different?
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by: Richard A. DeVenezia |
last post by:
Dear Experts:
Suppose I have global variables: x1, x2, x3
and I have a function that needs to assign a value to a new global variable
x4
something like
function foo ()
{
count = 0;
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by: Patient Guy |
last post by:
I have a library of functions representing a filesystem interface
(essentially a file selection interface, to be used in
opening/reading/writing/closing files).
Heavily scripted HTML document #1, very application-like, must include the
JS file for this library of functions. One reason is that it must call a
function to name a "callback" function, and within its own script block,
must define the callback function. The callback handles...
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by: MLH |
last post by:
A97 Topic: If there is a way to preserve the values assigned to
global variables when an untrapped runtime error occurs? I don't
think there is, but I thought I'd ask.
During development, I'm constantly running tests on imperfect code.
On of the cumbersome jobs encountered is reassigning global vars
their values after a close encounter with an untrapped runtime error.
Rather than writing a procedure to simply reassign them all with a...
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by: Michael |
last post by:
Hi newsgroup,
as the subject indicates I am looking for an advice
using global variables. I am not if this problem is more
about style then C. If its wrong in thi group, sorry.
So I have a couple of function that all need the same
information (all located in the same file). By now it looks like
/* file beginns */
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by: Charles O'Flynn |
last post by:
As a complete newcomer (2-3 days) to PHP, although not to programming in
general, I have 'dived in' to start a small project to read and parse an XML
data stream. I have already worked out most of the more specialist aspects
of the job but am now completely stuck on something I would have thought
were simplicity itself...
I need to have a large number of global variables visible inside functions -
it's not possible to pass them into the...
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by: CDMAPoster |
last post by:
About a year ago there was a thread about the use of global variables
in A97:
http://groups.google.com/group/comp.databases.ms-access/browse_frm/thread/fedc837a5aeb6157
Best Practices by Kang Su Gatlin, casual mention was made about using
static variables as an alternative to using global variables. This
caused me to think of the following:
'-----Begin module code
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by: Sandman |
last post by:
I dont think I understand them. I've read the section on scope in the
manual inside out.
I'm running PHP 5.2.0 Here is the code I'm working on:
//include_me.php
<?php
$MYVAR = array();
global $MYVAR, $a;
?>
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by: weaknessforcats |
last post by:
C++: The Case Against Global Variables
Summary
This article explores the negative ramifications of using global variables. The use of global variables is such a problem that C++ architects have called it polluting the global namespace. This article explores what happens when the global namespace becomes polluted and how to avoid this condition.
The opinions expressed in this article are those of the author alone although many have...
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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: 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: 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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