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  • Does binding temporary to a reference require a copy constructor in C++?

    - by vitaut
    Consider the following code: class A { A(const A&); public: A() {} }; int main() { const A &a = A(); } This code compiles fine with GCC, but fails to compile with Visual C++ with the following error: test.cc(8) : error C2248: 'A::A' : cannot access private member declared in class 'A' test.cc(2) : see declaration of 'A::A' test.cc(1) : see declaration of 'A' So is it necessary to have a copy constructor accessible when binding a temporary to a reference?

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  • How to determine element touched on touchend for a page with layers

    - by Greg
    I cannot supply a follow up question as of yet to Get the element under a touchend , so I am opening a new issue. I want to get the element under a touchend that is different from the touchstart, but my page has absolutely positioned elements, and the function document.elementFromPoint keeps on returning my background element instead of every element in front of it. How do I get the actual element being touched?

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  • Can anyone tell me whats wrong with this htaccess code

    - by mathew
    I am not able to get through with this code...I need to capture the request but with this code I am able to redirect but it cannot find the particular search page. RewriteCond %{THE_REQUEST} ^[A-Z]+\ /searcha\.php\?name=(www\.)?([^/\ ]+)[^\ ]*\ HTTP/ RewriteRule ^.*$ http://www.mydomain.com/%2? [R=301,L] can any one tell me what is I am missing??

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  • How can I allow Drag and Drop from Windows Explorer into a C# WPF application?

    - by Seabass__
    I know there have been tons of answers on this subject, but I still cannot get it to work at all. I've enabled AllowDrop on every control at every level of the application, and tried to catch DragEnter and Drop on every control to no avail. I can drag and drop items inside the application, but any time I try to bring something in from Windows Explorer or the desktop, etc. it gives me the No icon. Any ideas what I might be doing wrong?

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  • Right column content overflowing over my footer

    - by Sixfoot Studio
    Hi All, I know this has got something to do with a float, but I cannot seem to figure out where I am going wrong with this. Please check this page for me, the content in the right column is flowing over my footer. http://sun-eng.sixfoot.co.za/index.php?option=com_weblinks&view=categories&Itemid=48 Thanks! James

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  • How can I import color schemes into Visual Studio 2010?

    - by Andrew
    I recently came across this website: http://studiostyles.info, which contains a list of color schemes that people have already created. However, I can't find instructions on how to import them into Visual Studio 2010, does anyone know how? PS: I am sorry, if this question has been asked but I cannot find an answer, through search.

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  • C++ dynamic type construction and detection

    - by KneLL
    There was an interesting problem in C++, but it concerns more likely architecture. There are many (10, 20, 40, etc) classes that describe some characteristics (mix-in classes), for exmaple: struct Base { virtual ~Base() {} }; struct A : virtual public Base { int size; }; struct B : virtual public Base { float x, y; }; struct C : virtual public Base { bool some_bool_state; }; struct D : virtual public Base { string str; } // .... Primary module declares and exports a function (for simplicity just function declarations without classes): // .h file void operate(Base *pBase); // .cpp file void operate(Base *pBase) { // .... } Any other module can has a code like this: #include "mixins.h" #include "primary.h" class obj1_t : public A, public C, public D {}; class obj2_t : public B, public D {}; // ... void Pass() { obj1_t obj1; obj2_t obj2; operate(&obj1); operate(&obj2); } The question is how to know what the real type of given object in operate() without dynamic_cast and any type information in classes (constants, etc)? Function operate() is used with big array of objects in small time periods and dynamic_cast is too slow for it. And I don't want to include constants (enum obj_type { ... }) because this is not OOP-way. // module operate.cpp void some_operate(Base *pBase) { processA(pBase); processB(pBase); } void processA(A *pA) { } void processB(B *pB) { } I cannot directly pass a pBase to these functions. And it's impossible to have all possible combinations of classes, because I can add new classes just by including new .h files. As one of solutions that comed to mind, in editor application I can use a composite container: struct CompositeObject { vector<Base *pBase> parts; }; But editor does not need a time optimization and can use dynamic_cast for parts to determine the exact type. In operate() I cannot use this solution. So, is it possible to not use a dynamic_cast and type information to solve this problem? Or maybe I should use another architecture?

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  • mysql error dont understand what it is saying

    - by sea_1987
    Cannot add or update a child row: a foreign key constraint fails (`mydb`.`job_listing_has_employer_details`, CONSTRAINT `job_listing_has_employer_details_ibfk_2` FOREIGN KEY (`employer_details_id`) REFERENCES `employer_details` (`id`)) INSERT INTO `job_listing_has_employer_details` (`job_listing_id`, `employer_details_id`) VALUES (6, '5') What does this mean? The two ID's I am inserting into the table exsist.

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  • mysql with 3 group by and sum

    - by cyberfly
    Hi all I have this data in my table (tb_cash_transaction) I want to group the TYPE column, CURRENCY_ID column and AMOUNT column so it will become like below: **Currency** **Cash IN** **Cash OUT** **Balance** 14 40000 30000 10000 15 50000 40000 10000 Rule : 1.Group by currency 2.Then find the sum of cash in for that currency 3.Find the sum of cash out for that currency 4.Get the balance (sum cash in - sum cash out) How to achieve it using mysql? I try using group by but cannot get the desired output. Thanks in advance

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  • How to validate overlapping no in java

    - by anandhinaveen
    I Have dynamically render row. WE have fields like FROM TO. For eg: From TO 2 10, 2 3, 8 12 It cannot accept this combination row.. That means no number should be overlapping. For eg: From TO 2 10, 0 1, 11 12 This combination is allowed.the row may also increased. I need need to write a validation for this overlapping. Can any 1 help to solve this problem.

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  • No rule to make custom target

    - by Andy T
    add_custom_target(custom_target COMMAND ./some_script.sh WORKING_DIRECTORY subdir ) I cannot build this custom target because of error: make[4]: *** No rule to make target `subdir/all'. Stop. make[3]: *** [all] Error 2 make[2]: *** [project_dir/CMakeFiles/custom_target] Error 2 make[1]: *** [project_dir/CMakeFiles/custom_target.dir/all] Error 2 make: *** [all] Error 2 How to resolve this?

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  • C/C++ definitions of functions

    - by Vit
    Yesterday, I have been watching discussion here, about compilers and linkers. It was about C library function definitions. I have never thought of that, so it inspired me to do some searching, but I cannot find exactly what I want. I wonder, what is the smallest syntax you need to add into your source code to enable just printf() function. I mean the function declaration from stdio.h you need.

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  • Angular.js: value() not injected in config()

    - by Nik
    I am having trouble getting the value() injected into the app.config(). Here's the code (coffeescript) window.app = angular.module("app", []) app.value("template_path", "assets/angular/templates/users") app.config(["$routeProvider","template_path" ($routeProvider, template_path) -> console.log template_path it is throwing an "Unknown provider: template_path from app" error Could it be that the config() method cannot be injected with value() set values? I am using 1.0.2 Thank you!

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  • How to convert 3GP video for Android to view?

    - by RedNax
    Hi, I'm creating 3GP videos with the Android - however, when the 3GP files are posted on a site, the same Android phone cannot view it back. (The file works on the iPhone). What is right way to encode/resize the 3GP video so that the video player on Android can play it back? Thanks

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  • Counting the instances of customers

    - by Mikae Combarado
    Say that I have a table with one column named CustomerId. The example of the instance of this table is : CustomerId 14 12 11 204 14 204 I want to write a query that counts the number of occurences of customer IDs. At the end, I would like to have a result like this : CustomerId NumberOfOccurences 14 2 12 1 11 1 204 2 14 1 I cannot think of a way to do this.

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  • How to define custom exception class in Java, the easiest way?

    - by yegor256
    I'm trying to define my own exception class the easiest way, and this is what I'm getting: public class MyException extends Exception {} public class Foo { public bar() throws MyException { throw new MyException("try again please"); } } This is what Java compiler says: cannot find symbol: constructor MyException(java.lang.String) I had a feeling that this constructor has to be inherited from java.lang.Exception, isn't it?

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  • UIScrollView not scrolling...

    - by Mark
    I have a UIScrollView which contains many UIImageView's UILabel's etc... the labels are well longer that the UIScrollView, but when I run the app, I cannot click and scroll down... Why might this be? Thanks

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  • changing domain destination breaks site

    - by EquinoX
    I recently just changed my domain destination from the root (./) to (./Permias). Before I just did a website copy from visual studio to ./. So after changing my domain destination to ./Permias, I moved everything inside the Permias folder. But now when I tried to access the site it is as it's not there. What am I doing wrong? It just says the resouce cannot be found.

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