This is bizarre... I thought every object in java had Object as an ancestor. I have a ClassA that extends my ClassB and implements Runnable. After creating ClassA I cannot cast it to an Object. Assume getClassA returns a ClassA instance. I am doing Object obj = getClassA(); I also tried Object obj = (Object) getClassA(); I get...
Hello.. Please I have a class in c# whose main function is to return the types and objects as dictionary Over a service . Is it possible to cast the Object sents over the WCF service in the front end. I.e using reflection to get the type of an object from the types.ToString() and using the type to cast the objects. NB the Class that ...
I have an object, o, and a type, T. I'd like to use reflection to change object o to type T at runtime without instantiating it. The equivalent at compile time would be: Dim p as Point = Nothing I know how to use Activator.CreateInstance to create an instance at run time that is equivalent to: Dim p as New Point() But i don't want...
I have a base class with several classes extending it. I have some generic library utilities that creates a vector containing pointers to the base class so that any of the subclasses will work. How can I cast all of the elements of the vector to a specific child class? // A method is called that assumes that a vector containing // Dogs ...
it has been a while since I messed with C code. I am getting the following error when compiling C code under ubuntu using gcc. command i am using to compile code is(if these errors are because of comiler I am using , please let me know how to make that go away): gcc -o runnable mycode.C error: invalid conversion from ‘void*’ to ‘...
I have a base class: class RedBlackTreeNode { // Interface is the same as the implementation public: RedBlackTreeNode* left; RedBlackTreeNode* right; RedBlackTreeNode* parent; Color color; TreeNodeData* data; RedBlackTreeNode(): left(0), right(0), parent(0), color(Black), ...
Briefly, I have been given a custom soap header class CustomHeader that contains a string representing the user's security token. public string UserInfo { get { return this.userInfoField; } set { this.userInfoField = value; } } I have two webservices that both use the sam...
I have class Fred { public: void inspect() const {}; void modify(){}; }; int main() { const Fred x = Fred(); Fred* p1; const Fred** q1 = reinterpret_cast<const Fred**>(&p1); *q1 = &x; p1->inspect(); p1->modify(); } How would it be possible to do the const Fred** q1 = &p1 via pointer-casting? (I have just been reading...
I'm trying to cast List<object> to List<string> dynamically. I've tried several ways, but I can't find a solution. This is a small sample that shows the problem: List<object> listObject = new List<object>(); listObject.Add("ITEM 1"); listObject.Add("ITEM 2"); listObject.Add("ITEM 3"); List<string> listString = ¿¿listObject??; Thanks ...
Hi, I have a small sample function: #define VALUE 0 int test(unsigned char x) { if (x>=VALUE) return 0; else return 1; } My compiler warns me that the comparison (x>=VALUE) is true in all cases, which is right, because x is an unsigned character and VALUE is defined with the value 0. So I changed my code to: if ( ((sign...
Hey, In C++, I have a vector of type: vector<BaseClass*> myVector; In which, I insert (push_back) pointers of derived classes into it. Now, I want to pop back its elements so I do this: vector<ADlgcDev*>::iterator iter; for (iter = myVector.rbegin(); iter != myVector.rend(); iter++) { // but before I pop it, I need to shutdown it ...
Hi All! I'm have a groovy hibernate entity, named 'Depart' for example. Now when i'm try to get their property (for example Long id = somedepart.getIdDepart() ) i'm got an exception Cannot cast Depart to Depart_$$_javassist_5 Who make Depart_$$_javassist_5 - groovy or hibernate? Is there some workaround about this? ...
Hi, Currently I am trying to port some VB.NET code to C#. The struct looks like this in VB.NET: Public Structure sPos Dim x, y, z As Single Function getSectorY() As Single Return Math.Floor(y / 192 + 92) End Function Function getSectorX() As Single Return Math.Floor(x / 192 + 135) End Function F...
How can I make this function reliably cast sourceValue to type T where sourceValue is bool and T is int? public static T ConvertTo<T>(Object sourceValue) { // IF IS OF THE SAME TYPE --> RETURN IMMEDIATELY if (sourceValue is T) return (T) sourceValue; var val = ConvertTo(sourceValue, typeof (T)); return (T) val; } Curren...
The fact that it is a LINQ result might perhaps not be relevant for the question, but I'm mentioning it anyway - since this is the context which has resulted in this question. I run a LINQ query. The result is an; IEnumerable<MyClass> I want to put the result into an ObservableCollection; ObservableCollection<MyClass> How do I ...
I modified the extension method Thorarin gave in response to this question to work on an int instead of a string: public static TEnum ToEnum<TEnum>(this int intEnumValue, TEnum defaultValue) { if (!Enum.IsDefined(typeof(TEnum), intEnumValue)) return defaultValue; return (TEnum)intEnumValue; } The compiler gives the err...
I have three java types as defined below: Main.java: import java.util.Arrays; import java.util.List; public class Main { private Object callFunction() { OperationDefinitions func = OperationDefinitions.CONCATENATE; List<Object> values = Arrays.asList(new Object[] {"ABC", "-", "DEF"}); return func.call (values)...
Visual C++ 2008 C runtime offers an operator 'offsetof', which is actually macro defined as this: #define offsetof(s,m) (size_t)&reinterpret_cast<const volatile char&>((((s *)0)->m)) This allows you to calculate the offset of the member variable m within the class s. What I don't understand in this declaration is: Why are we cas...
From MSDN: By eliminating unnecessary casts, implicit conversions can improve source code readability. However, because implicit conversions can occur without the programmer's specifying them, care must be taken to prevent unpleasant surprises. In general, implicit conversion operators should never throw exceptions and never lose inf...
I get a compile error, "Cannot implicitly conver type 'System.Collections.ObjectModel.ObservableCollection to ProddataRecsObservable'. An explicit conversion exists" See comments in following code segments. //I created a custom class called ProddataRecsObservable derived from //ObservableCollection<Proddata> so I can do some special CRU...