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What is the difference between initializing a variable as global var or calling globals().update(var) .
Thanks
Started by frank on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You would use it in the following way:
var=0 def f(): global var var=1 f() print(var) # 1 <---- the var outside the "....
When you say
global var
you are telling Python that var is the same var that was defined in a global context.
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A global variable's scope is in all the files.. while a static global variable's scope is just the file where it is declared.. why so ? where are global or static global variables stored in memory ?
Started by TwiggedToday on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
There is some confusion, since static in C can mean is not necessarily an object with... .
They're both stored in the data segment; the difference is that the global has an externally-visible linker symbol, and the static global does not.
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If you had two snippets:
(global-set-key "\C-d" delete-char)
and
(define-key global-map "\C-d" delete-char)
Is there a difference between the two? If so, when would you use one over the other?
Started by haxney on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You can look up global-set-key 's source code with C-h....
Function define-key is rather used in Lisp programs.
Function global-set-key is an interactive function based on define-key which you can invoke by typing M-x global-set-key .
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Ask your Facebook Friends
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I have this code here. The only part I can add code to is in main AFTER the 'i=1' line. This script will be executing multiple times and will have some variable (might not be 'i', could be 'xy', 'var', anything), incrementing by 1 each time. I have gotten...
Started by frank on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
What's wrong.
If you want to use a global variable you have to declare it as global.
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Hi, I seem to have this problem after upgrading to PHP 5.3 from 5.2.
The site runs off index.php which includes() various other utility functions then includes the correct page based on GET variable value.
Now one thing I cannot understand is that in ...
Started by Ali on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Scope.)
I bet it works if you use one of these:
global $glob; $glob['dbusername'] = 'myusername'; $glob.
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I have to implement a set of 60 functions, according to the predefined signatures. They must be global functions, and not some class's member functions. When I implement them, I use a set of nicely done classes provided by 3rd party.
My implementation...
Started by Igor Oks on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
This will also give a more OO interface to clients of the API that are not constrained by the need of global is stored in the static members of my and 3rd party's classes, so I don't have to create global.
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I have a header file, lets say Common.h, that is included in all of the files over several projects. Basically i want to declare a global variable, e.g.:
class MemoryManager; DLL_EXPORT MemoryManager* gMemoryManager;
When i do this i get tons of linker...
Answer Snippets (Read the full thread at stackoverflow):
So each time this big....
Remember that the preprocessor reads in all the header files and makes one big file out of all of them .
These are then colliding at the linking stage.
As it is you are creating a separate copy of the variable in each compiled file .
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I’m trying to figure out a way to use nested global structs as a sort of API namespacing for my C library.
Specifically, I want to expose a single Primary ‘namespacing struct,’ that contains other such structs (such as Primary.Secondary ), that themselves...
Started by elliottcable on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Here's a condensed example:
#include <stdio.h> int a = 5; int b = a; int main(int argc, char *argv[]) { printf("Hello, world!\n"); return 0; }
Compiling this code gives the error:
main.c:4: error: initializer... .
What you're trying can't be done; sorry.
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How can I access a shadowed global variable in C? In C++ I can use :: for the global namespace.
Started by vitaly.v.ch on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
*/ }
what is a "shielded global variable" in pure C?
in C you have local variables, file local/global variables (static) and global variables (extern)
so file1.c: int bla; file2.c extern int you call shielded ....
It is shadowed.
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Lets say I have some global var GLOBAL in main.c, but my main.c has a #include "other.h". But other.h has global var GLOBAL too.
How do I let the compiler know which one I meant when I write GLOBAL in main. Is there a "this" keyword that I can use?
Started by SuperString on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
Rename the local variable to avoid hiding....
C might allow multiple it in your question) (BTW, why is it called GLOBAL then?), then it will hide the name of the variable in C.
You can't have two global variables with the same name in C program.
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