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• Timer class and C#

  - by John Terry

  I have a program written in C#. I want the Timer class to run a function at a specific time. E.g : run function X at 20:00 PM How can I do that using the Timer class?

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• How to set multiple permissions in one class view, depending on http request

  - by andrew13331

  How can I change the permissions depending on if it is a get or a post. Is it possible to do it in one class or would I have to separate it out into two classes? If its a get I want "permission_classes = (permissions.IsAuthenticated)" and if its a post I want "permission_classes = (permissions.IsAdminUser)" class CategoryList(generics.ListCreateAPIView): queryset = QuestionCategory.objects.all() serializer_class = QuestionCategorySerializer permission_classes = (permissions.IsAuthenticated,)

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• Call virtual method from base class on object of derived type

  - by Nikola Smiljanic

  class Base { public: virtual void foo() const { std::cout << "Base"; } }; class Derived : public Base { public: virtual void foo() const { std::cout << "Derived"; } }; Derived d; // call Base::foo on this object Tried casting and function pointers but I couldn't do it. Is it possible to defeat virtual mechanism (only wondering if it's possible)?

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• overloading friend operator<< for template class

  - by starcorn

  Hello, I have read couple of the question regarding my problem on stackoverflow now, and none of it seems to solve my problem. Or I maybe have done it wrong... The overloaded << if I make it into an inline function. But how do I make it work in my case? warning: friend declaration std::ostream& operator<<(std::ostream&, const D<classT>&)' declares a non-template function warning: (if this is not what you intended, make sure the function template has already been declared and add <> after the function name here) -Wno-non-template-friend disables this warning /tmp/cc6VTWdv.o:uppgift4.cc:(.text+0x180): undefined reference to operator<<(std::basic_ostream<char, std::char_traits<char> >&, D<int> const&)' collect2: ld returned 1 exit status template <class T> T my_max(T a, T b) { if(a > b) return a; else return b; } template <class classT> class D { public: D(classT in) : d(in) {}; bool operator>(const D& rhs) const; classT operator=(const D<classT>& rhs); friend ostream& operator<< (ostream & os, const D<classT>& rhs); private: classT d; }; int main() { int i1 = 1; int i2 = 2; D<int> d1(i1); D<int> d2(i2); cout << my_max(d1,d2) << endl; return 0; } template <class classT> ostream& operator<<(ostream &os, const D<classT>& rhs) { os << rhs.d; return os; }

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• Vim + OmniCppComplete: Completing on Class Members which are STL containers

  - by Robert S. Barnes

  Completion on class members which are STL containers is failing. Completion on local objects which are STL containers works fine. For example, given the following files: // foo.h #include <string> class foo { public: void set_str(const std::string &); std::string get_str_reverse( void ); private: std::string str; }; // foo.cpp #include "foo.h" using std::string; string foo::get_str_reverse ( void ) { string temp; temp.assign(str); reverse(temp.begin(), temp.end()); return temp; } /* ----- end of method foo::get_str ----- */ void foo::set_str ( const string &s ) { str.assign(s); } /* ----- end of method foo::set_str ----- */ I've generated the tags for these two files using: ctags -R --c++-kinds=+pl --fields=+iaS --extra=+q . When I type temp. in the cpp I get a list of string member functions as expected. But if I type str. omnicppcomplete spits out "Pattern Not Found". I've noticed that the temp. completion only works if I have the using std::string; declaration. How do I get completion to work on my class members which are STL containers? Edit I found that completion on members which are STL containers works if I make the follow modifications to the header: // foo.h #include <string> using std::string; class foo { public: void set_str(const string &); string get_str_reverse( void ); private: string str; }; Basically, if I add using std::string; and then remove the std:: name space qualifier from the string str; member and regenerate the tags file then OmniCppComplete is able to do completion on str.. It doesn't seem to matter whether or not I have let OmniCpp_DefaultNamespaces = ["std", "_GLIBCXX_STD"] set in the .vimrc. The problem is that putting using declarations in header files seems like a big no-no, so I'm back to square one.

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• how to added a GUI to my class

  - by Gerard Flynn

  hi i have a class that runs, it does the following backups a sql, zip, encrypts, ftp to an ftp server. what i want to do is add a GUI. Need to add a 2 buttons start and finish and progress bar for the procedure. my class is called backup.cs. i have tried creating a form but doesn't seam to work. any help would be great full Ta Gerard

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• Grails validateable not work for non-persistent domain class

  - by Hoàng Long

  I followed the instruction here: http://www.grails.org/doc/latest/guide/7.%20Validation.html and added into config.groovy: grails.validateable.classes = [liningtest.Warm'] Then added in src/groovy/Warm.groovy (it's a non-persistent domain class): package liningtest import org.codehaus.groovy.grails.validation.Validateable class Warm { String name; int happyCite; Warm(String n, int h) { this.name = n; this.happyCite = h; } static constraints = { name(size: 1..50) happyCite(min: 100) } } But it just doesn't work (both "blank false" & "size: 0..25") for the "hasErrors" function. It always returns false, even when the name is 25. Is this a Grails bug, if yes, is there any work-around? I'm using Grails 1.3.3 UPDATE: I have updated the simplified code. And now I know that constraint "size" can't be used with "blank", but still does not work. My test class in test/unit/liningtest/WarmTests.groovy package liningtest import grails.test.* class WarmTests extends GrailsUnitTestCase { protected void setUp() { super.setUp() } protected void tearDown() { super.tearDown() } void testSomething() { def w = new Warm('Hihi', 3) assert (w.happyCite == 3) assert (w.hasErrors() == true) } } And the error I got: <?xml version="1.0" encoding="UTF-8" ?> <testsuite errors="1" failures="0" hostname="evolus-50b0002c" name="liningtest.WarmTests" tests="1" time="0.062" timestamp="2010-12-16T04:07:47"> <properties /> <testcase classname="liningtest.WarmTests" name="testSomething" time="0.062"> <error message="No signature of method: liningtest.Warm.hasErrors() is applicable for argument types: () values: [] Possible solutions: hashCode()" type="groovy.lang.MissingMethodException">groovy.lang.MissingMethodException: No signature of method: liningtest.Warm.hasErrors() is applicable for argument types: () values: [] Possible solutions: hashCode() at liningtest.WarmTests.testSomething(WarmTests.groovy:18) </error> </testcase> <system-out><![CDATA[--Output from testSomething-- ]]></system-out> <system-err><![CDATA[--Output from testSomething-- ]]></system-err> </testsuite> UPDATE 2: When I don't use Unit test, but try to call hasErrors in the controller, it runs but return false value. (hasErrors return false with Warm('Hihi', 3) ). Does anyone has a clue?

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• Instantiating multiple beans of the same class with Spring annotations

  - by Francois

  With an XML configured Spring bean factory, I can easily instantiate multiple instances of the same class with different parameters. How can I do the same with annotations? I would like something like this: @Component(firstName=”joe”, lastName=”smith) @Component(firstName=”mary”, lastName=”Williams”) public class Person { /* blah blah */ }

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• if we put template class member function defination in .cpp(not in headerfile) with explicit instant

  - by user323422

  For example //temp.h class ABC { pubilc: void temp(T &a); }; //temp.cpp( ) void ABc<T>::temp(T &a){} //defination ( it should be in header file?????????) template class ABC<int>; //main.cpp int main() { int i=10; ABC<int> a; a.temp(i); return 0; }

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• what is the equivalent for java class : BigDecimal in c#

  - by radi

  hi all , BigDecimal is a class in java.math package it has a lot of benefits for handling big numbers with certain scale . is there an equivalent class or data type in c# with this features

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• Best way to mark an inherited class as NOT serializable

  - by initialZero

  If I inherit from a class that is serializable but I specifically do not want my class to be serializable; what's the best way to strictly prevent serialization? If there was a method in java.io.Serializable maybe I could throw an exception, but Serializable is empty.

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• Subscript / superscript in FormattedText class?

  - by stefan.at.wpf

  Hello, I'm creating Text using the FormattedText class - but how can I subscript oder superscript Text when using this class? I found solution on how to do this when using a TextBlock, but I'm using FormattedText and not the TextBlock ): Thanks for any hint!

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• C# generic - returning objects of the derived class?

  - by learningcsharp

  public class BaseClass{ public static T Find<T>(object value){ -- db.get<T>("params", value); } } public class Derived: BaseClass{ } ... void someMethod(){ Derived obj = Derived.Find<Derived>(1); } In the above code how do I change Derived obj = Derived.FindDerived<Derived>(1); to Derived obj = Derived.Find(1);

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• How to assert that a class has an inherited attribute, but excluding the parent class at the same ti

  - by Pawel Krakowiak

  I have two attributes - MigrationAttribute and TestDataMigrationAttribute : MigrationAttribute. How can I assert that a class has applied TestDataMigrationAttribute but not MigrationAttribute (which is the parent attribute class)?

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• Is restricting attributes to class or properties doable?

  - by Will Marcouiller

  I have two custom attributes defined like so: internal class SchemaAttribute : Attribute { internal SchemaAttribute(string schema) { Schema = schema; } internal string Schema { get; private set; } } internal class AttributeAttribute : Attribute { internal AttributeAttribute(string attribute) { Attribute = attribute; } internal string Attribute { get; private set; } } I would like to restrict the SchemaAttribute to classes, and the AttributeAttribute to properties. Is this doable?

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• Call Slot of different class

  - by sijith

  Hi, I want to execute the slot of different class. When i execute this code its compiling without any error but not getting Output pendrive1::pendrive1() { UI_CDBurn Obj; connect( Obj.penDrive, SIGNAL(clicked()),&Obj , SLOT(caller())); } Here my slot is not working. Slot in UI_CDBurn is public. But when i called with a button in pendrive1 class its working fine connect( ui.pushButton, SIGNAL(clicked()),Obj , SLOT( caller())); // Working File

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• Repeating procedure for every item in class

  - by Hendriksen123

  Data.XX.NewValue := Data.XX.SavedValue; Data.XX.OldValue := Data.XX.SavedValue; I need to do the above a large number of times, where XX represents the value in the class. Pretending there were 3 items in the list: Tim, Bob, Steve. Is there any way to do the above for all three people without typing out the above code three times? (Data is a class containing a number of Objects, each type TList, which contain OldValue, NewValue and SavedValue)

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• Call JNI methods that were not written for your class

  - by JT

  It seems that JNI methods need to be written with the Java class signature built in to them. I want to call a JNI method that I didn't write. Can I call a native method on a library that was not written with my class in mind?

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• PHP : substitute to wpdb class in wordpress

  - by justjoe

  wpdb class in wordpress use to make connection to database. is there any substitute to this class in PHP repository? So i can access different database then the original database that have been initiate in wp-config ?

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• Using grails service in domain class

  - by BlackPanther

  In my grails application I want use service.However it is always coming as null.I am using grails 1.1 version.How to solve this problem. Sample code: class A{ String name; def testService; static transients=['testService'] } Can we use service inside domain class?

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• How does java implement inner class closures?

  - by thecoop

  In Java an anonymous inner class can refer to variables in it's local scope: public class A { public void method() { final int i = 0; doStuff(new Action() { public void doAction() { Console.printf(i); // or whatever } }); } } My question is how is this actually implemented? How does i get to the anonymous inner doAction implementation, and why does it have to be final?

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• Declaring refrences /objects in Destructor of a class

  - by Sachin Chourasiya

  Does it make any sense of declaring objects or refrences in a destructor of a class in C++? I mean class A { A() { } ~A() { //Declaring refrences or objects here // } }

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• How to search an inner class?

  - by Neoryder

  I have these classes. class Author{ Person person } class Person{ String lastName String firstName String middleName } I'd like to query Person and Author. def persons = Person.findAllByLastNameiLike("${a}") but it seems I can't do def authors = Author.findAllByPerson(persons) Any ideas how I'd do this?

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• Visibility of properties in scala class

  - by isola009

  I defined a property in the constructor of my class the following way: class Step(val message:String = "") When I try access to message value from Java code y get a visbility error. Why?

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• Changing css-class-wrapper parameter of liferay portlet at runtime

  - by 2DH

  As the title says - I need to change css-class-wrapper parameter at runtime, preferably in action class. I've found that Portlet interface has setCssClassWrapper method that could probably do what I want, but I can't seem to find any easy way to access current portlet object from my code. Could anyone please give me a hand with what I want to achieve. Thanks.

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