Refers to a space where variables and other items may be accessed from any scope.
Questions tagged [global]
4669 questions
31
votes
5 answers
C++: When (and how) are C++ Global Static Constructors Called?
I'm working on some C++ code and I've run into a question which has been nagging me for a while... Assuming I'm compiling with GCC on a Linux host for an ELF target, where are global static constructors and destructors called?
I've heard there's a…
Matthew Iselin
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30
votes
5 answers
Python - Easiest way to define multiple global variables
I am trying to look for an easy way to define multiple global variables from inside a function or class.
The obvious option is to do the following:
global a,b,c,d,e,f,g......
a=1
b=2
c=3
d=4
.....
This is a simplified example but essentially I need…
Stephen Gelardi
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30
votes
8 answers
Python: "global name 'time' is not defined"
I'm writing a silly program in python for a friend that prints "We are the knights who say 'Ni'!". then sleeps for 3 seconds, and then prints "Ni!" twenty times at random intervals using the random module's uniform() method. Here's my code:
from…
Rafe Kettler
- 75,757
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30
votes
7 answers
Objective C defining UIColor constants
I have a iPhone application with a few custom-defined colors for my theme. Since these colors will be fixed for my UI, I would like to define the colors in a class to be included (Constants.h and Constants.m). How do I do that? (Simply defining them…
futureelite7
- 11,462
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29
votes
3 answers
WPF - Global Style?
Is there a way to setup global styles for my WPF application?
What I'm hoping to do is apply a style to all my Buttons that also have an Image child.
Sonny Boy
- 7,848
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29
votes
7 answers
Global functions in javascript
I'm new to js and trying to understand global and private functions. I understand global and local variables. But if I have an html named test.html and a 2 js files named test1.js and test2.js. Now I include the test1.js and test2.js in test.html…
ugandajs
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29
votes
5 answers
C# Namespace Alias qualifier (::) vs Dereferencing Operator (.)
Quick and simple question. I kind of understand what the Namespace Alias qualifier does, it's for accessing members in a namespace, however so does the dereferencing operator. I am really baffled as to the difference in this situation, why you would…
Francisco Aguilera
- 3,099
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29
votes
4 answers
Global variable "count" ambiguous
#include
using namespace std;
int count = 0, cache[50];
int f(int n)
{
if(n == 2) count++;
if(n == 0 || n==1) return n;
else if (cache[n] !=- 1) return cache[n];
else cache[n]= f(n-1) + f(n-2);
return cache[n];…
user801154
28
votes
3 answers
How to share/export a global variable between two different perl scripts?
How do we share or export a global variable between two different perl scripts.
Here is the situation:
first.pl
#!/usr/bin/perl
use strict;
our (@a, @b);
.........
second.pl
#!/usr/bin/perl
use strict;
require first.pl;
I want to use global…
Cthar
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28
votes
7 answers
What is the difference between a static global and a static volatile variable?
I have used a static global variable and a static volatile variable in file scope,
both are updated by an ISR and a main loop and main loop checks the value of the variable. here during optimization neither the global variable nor the volatile…
Manoj Doubts
- 13,579
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28
votes
2 answers
Best Practice for globals in clojure, (refs vs alter-var-root)?
I've found myself using the following idiom lately in clojure code.
(def *some-global-var* (ref {}))
(defn get-global-var []
@*global-var*)
(defn update-global-var [val]
(dosync (ref-set *global-var* val)))
Most of the time this isn't even…
Jeremy Wall
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28
votes
8 answers
Strange behavior of static global variable
I know that this program is not using the static variable in an appropriate way, but it shows how to reproduce a behavior I have seen :
Main.cpp :
int main(){
MyObject* p = new MyObject();
Header::i = 5;
printf("i %i\n", Header::i);
…
Arcyno
- 4,153
- 3
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- 52
28
votes
7 answers
global variables in php not working as expected
I'm having trouble with global variables in php. I have a $screen var set in one file, which requires another file that calls an initSession() defined in yet another file. The initSession() declares global $screen and then processes $screen further…
Josh Smeaton
- 47,939
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27
votes
6 answers
How do you define a global function in C++?
I would like a function that is not a member of a class and is accessible from any class.
I assume I would have to #include the header file where the function is declared, but I don't know where to define such a global function.
Are there good…
Cory Klein
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27
votes
6 answers
PHP $this variable
I am reading some PHP code that I could not understand:
class foo {
function select($p1, $dbh=null) {
if ( is_null($dbh) )
$dbh = $this->dbh ;
return;
}
function get() {
return $this->dbh;
}
}
I can't find $this->dbh…
wordpressquestion
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