I have a ViewController class called GamePlay. In GamePlay there is a nested class called MyPinAnnotationView. When MyPinAnnotation's method TouchesBegan() gets called, I want to call a method CheckAnswer() from the parent GamePlay. I do not want to create a new GamePlay instance because I have variables and instances already set. C...
What's the proper way to inherit from a template class with the template argument being a nested class within the inheriting class? class SomeClass : public TemplateClass<NestedClass> { class NestedClass {}; }; ...
While working with some templates and writing myself a basic container class with iterators, I found myself needing to move the body of member functions from a template class into a separate file to conform to style guidelines. However, I've run into an interesting compile error: runtimearray.cpp:17: error: expected constructor, de...
Given the following code: public class Outer { public final int n; public class Inner implements Comparable<Inner> { public int compareTo(Inner that) throws ClassCastException { if (Outer.this.n != Outer.that.n) // pseudo-code line { throw new ClassCastException("Only Inners with t...
What is the difference between these two innerclass declarations? Also comment on advantages/disadvantages? case A: class within a class. public class Levels { static public class Items { public String value; public String path; public String getValue() { return value;} } } and case B: class within interface...
Is it possible to nest a singleton class inside a non-singleton class in C#, and if so, are there any restrictions to the life-cycle of the singleton in this case? public class NonSingletonClass { public NonSingletonClass() { // Initialize some stuff. } // Put some methods here. public class SingletonClass { // Sin...
So, this is a question of coding style more or less. I'm using Bean Validation here but the idea is the same for any interface that has simple implementations that aren't likely to get changed all that often. @Target( { METHOD, FIELD, ANNOTATION_TYPE }) @Retention(RUNTIME) @Constraint(validatedBy = PhoneNumber.PhoneNumberValidator.clas...
Hi, I have a static nested class, which I would like to return via a static accessor (getter). public class SomeClass { public static class Columns<CC> { ... public static int length = 5; } public static Columns<?> getColumnEnumerator() { int x = Columns.length; //no problems retur...
Hi there. I'm wondering if SwingWorker has to be a nested class within my main GUI. I'd rather make it an external class to keep the GUI clear from any of my programs logic. I tried to make the SwingWorker class external, which works fine for the process, unfortunately I can't access any of my GUI fields from the SwingWorker class. When...
Hi, I'm curious as to what is good practice when it comes to certain scenarios involving nested types in .NET. Lets say you have a Wheel class, and the Wheel class holds Bearing objects. A Bearing object only makes sense within a Wheel and you do not want to allow it to be created independently, so it would make sense to have the Bear...
First time on StackOverflow, so please be tolerant. In the following example (apologies for the length) I have tried to isolate some unexpected behaviour I've encountered when using nested classes within a class that privately inherits from another. I've often seen statements to the effect that there is nothing special about a nested cl...
I have class A and list of A objects. A has a function f that should be executed every X seconds (for the first instance every 1 second, for the seconds instance every 5 seconds, etc.). I have a scheduler class that is responsible to execute the functions at the correct time. What i thought to do is to create a new class, ATime, that wil...
Which one is more acceptable (best-practice)?: namespace NP public static class IO public static class Xml ... // extension methods using NP; IO.GetAvailableResources (); vs public static class NP public static class IO public static class Xml ... // extension methods NP.IO.GetAvailableResources (); Also ...
Howdy, I am attempting to use the fully qualified name of my nested class as below, but the compiler is balking! template <class T> class Apple { //constructors, members, whatevers, etc... public: class Banana { public: Banana() { //etc... } //other constructors, members, etc... }; };...
I'm new to C++, so bear with me. I have a generic class called A. A has a nested class called B. A contains a method called getB(), which is supposed to return a new instance of B. However, I can't get my code to compile. Here's what it looks like:#include A.h template <class E> class A { public: class B { public: ...
OK, I guess I'm missing something obvious here, but I still can't make it work... I have a page in ASP.NET. I have a nested class inside the page. I have a property in this nested class. How can I access the page's viewstate from the property's Set statement? Thanks! ...
Is it possible to forward-declare a nested class, then use it as the type for a concrete (not pointer to/reference to) data member of the outer class? I.E. class Outer; class Outer::MaybeThisWay // Error: Outer is undefined { }; class Outer { MaybeThisWay x; class MaybeThatOtherWay; MaybeThatOtherWay y; // Error: MaybeThatOt...
So, if you try to do a nested class like this: //nestedtest.php class nestedTest{ function test(){ class E extends Exception{} throw new E; } } You will get an error Fatal error: Class declarations may not be nested in [...] but if you have a class in a separate file like so: //nestedtest2.php class neste...
In java what are nested classes and what do they do? ...
Given what I know of every other type of static feature of programming––I would think the answer is 'no'. However, seeing statements like OuterClass.StaticNestedClass nestedObject = new OuterClass.StaticNestedClass(); makes me wonder. ...