global-variables

问题 I have code similar to this in Objective-C: SubclassOfNSObject *GlobalVariableThatShouldNeverChange; @implementation MyClass +(void) initialize { [super initialize]; GlobalVariableThatShouldNeverChange = [[SubclassOfNSObject alloc] init]; // Change more stuff with GlobalVariableThatShouldNeverChange } @end I have this referenced throughout code, and the pointer to this should never change because I am using it everywhere through my code. The problem is, that when I run my tests using GHUnit ,

问题 When debugging a non-managed C++ project in Visual Studio 2008, I occasionally want to see the value of a global variable. We don't have a lot of these but those that are there all declared within a namespace called 'global'. e.g. namespace global { int foo; bool bar; ... } The problem is that when the code is stopped at a breakpoint, the default debugging tooltip (from pointing at the variable name) and quickwatch (shift-f9 on the variable name) don't take the namespace into consideration

问题 I am developing an ASP.NET MVC 3 web application using Razor and C#. I just discovered that I have some problems with global variables, probably because I am relatively new to MVC. I have a controller with some global variables and action methods. I declared a global variable in order to allow the action methods to manipulate it and reflect the manipulations to all the action methods. I have the following situation: public class myController : Controller { private string _MyGlobalVariable;

问题 I am developing an ASP.NET MVC 3 web application using Razor and C#. I just discovered that I have some problems with global variables, probably because I am relatively new to MVC. I have a controller with some global variables and action methods. I declared a global variable in order to allow the action methods to manipulate it and reflect the manipulations to all the action methods. I have the following situation: public class myController : Controller { private string _MyGlobalVariable;

问题 I want to define a global container (C++03), and here's an example code I tried, which does not work. #include <vector> #include <string> using namespace std; vector<string> Aries; Aries.push_back("Taurus"); // line 6 int main() {} Compile error: prog.cpp:6:1: error: 'Aries' does not name a type It seems I can define an empty global vector, but cannot fill it up. Looks like in C++03, I cannot specify an initializer either, such as: vector<string> Aries = { "Taurus" }; Have I made a mistake

问题 I want to create a class in objective-c with already stored data, so that for accessing the data I don't want to instantiate the class. how can I do it? 回答1: You can use a singleton or you can use a class made only of class methods and giving you access to static data. Here is a basic singleton implementation in ObjC: @interface MySingleton : NSObject { } + (MySingleton *)sharedSingleton; @property(nonatomic) int prop; -(void)method; @end @implementation MySingleton @synthesize prop; +

问题 I'm using Qt and in the main method I need to declare an object that I need to use in all my other files. How can I access that object in the other files? (I need to make it global..) I'm use to iPhone development and there we have the appDelegate that you can use all over the application to reach objects you've declared in applicationDidFinishLaunching method. How can I do the same in Qt? 回答1: global_objects.hpp extern int myGlobalInt; global_objects.cpp #include "global_objects.hpp"

问题 Is there a simple way to make all variables in a function global? I have 20 odd variables in a function and naming them global one by one doesn't make nice code... to me anyway :) 回答1: Warning: Don't try this at home, you might burn it down. There is no legitimate reason to do the following in the course of normal day-to-day programming. Please review the other answers to this question for more realistic alternatives. I can barely imagine why you would want to do this, but here is a way to do

问题 I'm doing a style.php CSS file so I can use some dynamic variables in the CSS within a Wordpress installation: <?php header("Content-type: text/css"); ?> and so on. How can I access a global variable from within the style.php file or pass a variable to it? The code I'm trying to get to work within the CSS is like $maincolor = $cap->br_main_color; Also: Ignore the caching issue. This is just a personal project. Passing the variable in the link to the stylesheet is too complex for this (in my

问题 I wish to create a Javascript object with nested variables where some of the variables will not have a default value specified. I currently have this: var globalVarA = "foo"; var globalVarB = "bar"; var globalVarC; function myFunction(){ //do something } I wish to change this to: var myObject = { GlobalVars: { globalVarA: "foo", globalVarB: "bar", globalVarC }, myFunction: function(){ //do something } } However I get the following error: Expected ':' How can I declare this variable without a