What happens when you deallocate a reference twice or more in c++?
- by flopex
int main(){
Employee *e = new Employee();
delete e;
delete e;
...
delete e;
return 0;
}
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What happens when you deallocate a pointer twice or more in C++?
- by flopex
int main(){ Employee *e = new Employee(); delete e; delete e; ... delete e; return 0; }Read the article
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How can I call a method given only its name?
- by mfolnovich
I'm trying to have method void run( string method ) which would run method in that class. For example: class Foo { public: void run( string method ) { // this method calls method *method* from this class } void bar() { printf( "Function bar\n" ); } void foo2() { printf( "Function foo2\n" ); } } Foo foo; int main( void ) { foo.run( "bar" ); foo.run( "foo2" ); } this would print: Function bar Function foo2 Thanks! :)Read the article
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WebView load javascript on the fly
- by ADAM
I have the following code which loads and html file into a webview - (void)awakeFromNib{ NSString *resourcesPath = [[NSBundle mainBundle] resourcePath]; NSString *htmlPath = [resourcesPath stringByAppendingString:@"/main.html"]; [[self mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:htmlPath]]]; } How would i dynamically load a css file (in the most efficient manner) as it does not suit to have the css file link in the html fileRead the article
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Multi-Dimensional Array and ArrayIndexOutOfBoundsException
- by notset
Hello, I have a strange problem which I can't fix: A field: private boolean[][][] gaps; Constructor (1st line): gaps = new boolean[NOBARRICADES][WIDTH][HEIGHT]; Constructor (2nd line): for (int i = 0; i < NOBARRICADES; i++) { JAVA throws an error for the 2nd line, saying: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException Does it have anything to do with JAVA syntax (the mistake is in these lines of code) or I should look for the problem somewhere else?Read the article
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AJAX: is the new loaded content using the same css file ?
- by Patrick
When I load content with AJAX, is this content supposed to automatically use the preloaded main page css style ? For example, if I load a <span class="smallText">hello</span> with AJAX. Is this new HTML using the default.css file with .smallText { font-size:6px; } ?Read the article
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Editing Many RichTextBoxes and TextBoxes
- by korenani
How do i cut,copy,paste from main menu in a multi textboxes form ? How does the menu knows to apply on the active textbox ?Read the article
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WPF bind IsEnabled on other controls if a listbox has a select item
- by the empirical programmer
I have a grid with 2 columns, a listbox in column 0 and a number of other controls in the a secondary grid in the main grids column 1. I want this controls only to be enabled (or perhaps visible) if an items is selected in the listbox through binding. I tried on a combo box: IsEnabled="{Binding myList.SelectedIndex}" But that does not seem to work. Am I missing something? Should something like this work? thanksRead the article
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loading a page using jquery.
- by pradeep
i am using jquery. my main page is .index.php. on load of this page .how do i load another page internally. say a small block in the page ?Read the article
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How do you get the width of an element without a defined width?
- by Moak
How would you find out the width of a element that is wrapped by 20 odd other elements, but the only fixed width I know is the main wrapper's which is 800px. All child elements are generally blocks, floating or not, with different paddings and margins. I don't really need the answer to a specific case, I'm just wondering if there are tools or tricks to quickly calculate such things. ThanksRead the article
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jquery stupid error
- by user276640
here is url http://mrhome.ru/Home/MenuPageContent/41?q=??&pid=39 if click search, it not work (quess it because of param q) but on url http://mrhome.ru/Home/main search is work what the problem?Read the article
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Incorrect rotation of a view controller in iOS 6
- by XenElement
In my app I've been using the now deprecated shouldAutoRotateToFace method. Now when using the iOS 6 simulator, all of my subviews are rotated to portrait orientation while the device is in landscape. Does anyone have any idea what could cause this? I've already tried replacing should autorotate in my main view controller with the supportedOrientations method (or whatever it is that you're now supposed to use instead).Read the article
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What is wrong in this c++ code?
- by narayanpatra
Why this coder do not show error #include <iostream> int main() { using namespace std; unsigned short int myInt = 99; unsigned short int * pMark = 0; cout << myInt << endl; pMark = &myInt; *pMark = 11; cout << "*pMark:\t" << *pMark << "\nmyInt:\t" << myInt << endl; return 0; } But this one shows : #include<iostream> using namespace std; int addnumber(int *p, int *q){ cout << *p = 12 << endl; cout << *q = 14 << endl; } #include<iostream> using namespace std; int addnumber(int *p, int *q){ cout << *p = 12 << endl; cout << *q = 14 << endl; } int main() { int i , j; cout << "enter the value of first number"; cin >> i; cout << "enter the value of second number"; cin >> j; addnumber(&i, &j); cout << i << endl; cout << j << endl; } In both the code snippets, I am assigning *pointer=somevalue. In first code it do not show any error but it shows error in the line cout << *p = 12 << endl; cout << *q = 14 << endl; What mistake I am doing ?Read the article
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how to do svn labeling.(modified)
- by Vipin Nemade
hi friends, I am working on linux enviournment and currently i am using svn's branch for developement purpose...but now i have to delete it and i have to work with main brach with today's date as a lebel like ..suppose my svn repostiory is "xyz" so now i want it to be like "xyz_production_lastproductionDate" than how to label it.Please share your opinion as i got stuck because of this... Thanks in advanceRead the article
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Display different iphone views depending on logged in status
- by user330936
I want to display a login view to my users if they are not logged in and the main view if they are. In my header file I define a variable to hold the logged in status #define loggedIn 0 I figure I should then reference this in the initWithNibName method and then decide which nib to load. Is the right way of doing it? If so can someone help me out with the exact code? Thanks for any helpRead the article
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why does a+1 and &a+1 gives diff ans when a is an int array using c
- by shraddha
int main() { int a[]={1,2,3,4,5,6,7,8,9,0}; printf("a = %u , &a = %u\n",a,&a); printf("a+1 = %u , &a+1 = %u\n",a+1,&a+1); } how a and &a are internally interpreted?Read the article
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autoreferencing this class to use in another for c++
- by atomsfat
in java we can do this: public class A{ public static void main(String...str){ B b = new B(); b.doSomething(this); //How I do this in c++ ? the this self reference } } public class B{ public void doSomething(A a){ //Importat stuff happen here } } How can I do the same but in c++, I mean the self reference of A to use the method in B ?Read the article
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What's the output of the following code after removing errors?
- by asdf
Class A { public A() { system.out.println("con call"); } static { system.out.println("static call"); } { system.out.println("ins call"); } public static void main(string[] args) { new A(); new A(); } }Read the article
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Where are certain Wordpress files that I want to programmatically edit?
- by user173951
I have a simple perl script that via ftp uploads files to the server hosting our website. After I do that I have to login as a Wordpress admin and use the GUI to edit a page so that it reflects the new file I just uploaded. I want to programmatically edit that file to save a few steps, but I can't find the file. Are any Wordpress files sitting on the server? The file in question is basically a subpage of the main site.Read the article
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How to make c++ console application not exit until user presses any key?
- by user198729
#include <iostream> using namespace std; int main() { cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!! return 0; } The exe generated by the above will exit automatically,how to change the behavior?Read the article
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Business object and linq2SQL
- by Overdose
What is the optimal way to write the code which interacts with DB using linq2SQL? I need to add some business logic to the entities. So I guess there are two ways: Write some wrapper class. The main minus is that many fields are the same, so i don't feel it as DRY style. Add business logic methods to linq2sql entities(these classes are partial) directly ???Read the article
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Accessing initialized variable on different class C++
- by d0pe
I'm having some difficulties with this problem. The main idea is, I initialized a variable of class type B in class A, class A.h has the variable Z declared as public, like B *Z; In class A.cpp, I initialized it as Z = new B(); Now, I want to access that variable from class C and I'm unable to do so. C.h includes A.h and B.hRead the article
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Get a random folder C# .NET
- by Joshua
Hi. public sealed static class FolderHelper { public static string GetRandomFolder() { // do work } } But.... How? Like start at c:\ (or whatever the main drive is) and then randomly take routes? Not even sure how to do that.Read the article
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How to track CVS Check-Ins
- by Geek
We recently created a branch out of the main branch of our code for the beta. Now I want to check what all files have changed in the branch in the last one week. How to get that information out of CVS. What is the command for this ?Read the article
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Django for web2py developers
- by carrier
Now that I've gotten relatively familiar with web2py, I'd like to give Django a go. What are the main differences? What would be the most efficient way to get started taking into account web2py knowledge? (It must help to have some python application framework knowledge,no?) EDIT Also, if you've used both, can you offer an opinion on which you prefer and why?Read the article
