Hello, Let's say i have a function that returns an object of type SomeClass. And i have code like this: $test = function_to_return_someclass(); Now i want to use the $test variable in an IDE, but i want it to understand that $test is of type SomeClass. I can do it easily with class variables by using the /** @var */ comment, but this...
Eric Lippert's comments in this question have left me thoroughly confused. What is the difference between casting and conversion in C#? ...
All, I'm doing some image manipulation in Scala by making use of BufferedImages and Raster objects. I am attempting to get all the pixels in the buffered image with the following code. val raster = f.getRaster() // Preallocating the array causes ArrayIndexOutOfBoundsException .. http://forums.sun.com/thread.jspa?threadID=5297789 // R...
I've got a piece of code in a project (MyProject) that contains early bound object from a referenced assembly (We'll call it CommonAssembly): Dim myObject As CommonAssembly.MyEarlyBoundType now I have another assembly that is dynamically loaded because it is not present in all projects: Dim myLateBoundObject As Object = AppDomain.Cu...
In particular, will the following ever not work as expected: typedef void(*func_p)(void*); void foo(int* data) { printf("%i\n",*data); } int main(int argc, char** argv) { func_p bar; int x = 42; bar = foo; bar((void*)&x); return 0; } ie, can I rely on data pointers (void*, int*, struct baz*,...
You can upcast or downcast an instance (to a superclass or subclass) using this syntax: var i:MyClass = MyClass(instance); But what does the as keyword do? var i:MyClass = (instance as MyClass); Are they equivalent? or am I missing something here... ...
While I was trying to build a Number subclass in AS3 I noticed I cannot extend the Number/int/etc. classes --- they are final. The next best thing was casting. Still, I also don't think this is possible but since I've been asking myself this for a while I said I'd ask here to find out. Can you create custom casting for a class you crea...
What will be the output if I write In C++ if(5) will be executed without any problem but not in C# same way will it be able to run. if(func()){} //in C# it doesn't runs Why how does C# treats void and how in Turbo C++ void func() { return; } if(null==null){}//runs in C# EDIT if(printf("Hi"){} //will run and enter into if statemen...
Possible Duplicate: When should static_cast, dynamic_cast and reinterpret_cast be used? Until a few days ago, I've always used C style type casting in C++ because it seemed to work good. I recently found out that using C in C++ is very bad.. I've never really used C++ casting before, so I'm wondering if someone could tell me ...
I have following class: template <size_t size> class Araye{ public: Araye(int input[]){ for (int i=0;i<size;i++) araye[i]=input[i]; } int araye[size]; }; How should I write a cast-to-reference-to-array operator for this class so that following works: int adad[3]={1,2,3}; Araye<3> araye(adad); int (&reference)[3]=araye; ...
I'm dividing some integers x & y in MS SQL, and I wan the result to be in a floating-point form. 5/2 should equal 2.5. When I simply do SELECT 5/2 I get 2, which doesn't suprise me, since it's creating an int from two ints. I know I can force it to a float by doing: SELECT CAST(5 AS FLOAT)/CAST(2 AS FLOAT); but that seems like ...
I was reading some code that a consultant provided us. It's a bit convoluted, and at the end of a function, it reads: return (int) 1; Instead of: return 1; PHP has a lot of magic in it; is this as bone-headed as it looks, or is there a valid reason to cast an integer as an integer? ...
Hello! Whenever I need to use the intelligence of Netbeans to show properties/methods, I explicitly declare a new object and then re-reference it. Something like.. $moo = new Cow(); $moo = Cow::getById(1); $hasMilk = $moo->hasMilk(); Is there a way I can avoid this by type-casting the variable when getting it? Or atleast a...
Possible Duplicate: how to copy char * into a string and vice-versa I have to pass a value into a method that required a char * MyMethod(char * parameter) { // code } However, the parameter I need to feed it is currently a std::string. How do I convert the std::string to a char *? std::string myStringParameter = //what...
Is the following code 100% portable? int a=10; size_t size_of_int = (char *)(&a+1)-(char*)(&a); // No problem here? std::cout<<size_of_int;// or printf("%zu",size_of_int); P.S: The question is only for learning purpose. So please don't give answers like Use sizeof() etc ...
Is there a more efficient way (preferably O(1) rather than O(n) but at least faster to type) to typecast the elements of a vector than this? public Vector<String> typecastVector(Vector<Object> objects){ Vector<String> strings = new Vector<String>(); for(Object o : objects) strings.add((String) o); return strings; } ...
I found in some legacy code I'm dealing with this function (in C++) Vec3d Minimum() { if(this->valid) { return minBB; } else { return NULL; } } where Vec3d is a object that is basically a struct with x,y,z and some operators overloaded (code below). AFAIK, you can't return a 0 for a user define...
I'm trying to use QSharedPointer in my polymorphic stucture, but I couldn't find right syntax to convert pointer of base class to pointer of derived class. struct Switch : State { int a; }; QSharedPointer <State> myState=QSharedPointer <State>(new Switch); QSharedPointer <Switch> mySwitchTest= ??? myState; What should I put in th...
Hello, I have got a problem on casting an object to one of it's base interfaces living in another library. Here is the code for it: BaseSDK.dll public interface IPlugin { void Run(); } CustomPlugin.Definition.dll: public interface ICustomPlugin { void DoCustomStuff(); } CustomPlugin.dll (has reference to BaseSDK.dll and Cu...
When I have two MongoDB documents like this... db.test.insert( {"value" : "10123"} ); db.test.insert( {"value" : "160"} ); The result of a query like: db.test.find({"value" :{$gt : "12"} }); is.. { "_id" : ObjectId("4c6d1b92304326161b678b89"), "value" : "160" } It's obvious, that a string comparison is made, so that my first va...