Is there any good reason that an empty set of round brackets (parentheses) isn’t valid for calling the default constructor in C++? MyObject object; // ok – default ctor MyObject object(blah); // ok MyObject object(); // error I seem to type “()” automatically everytime. Is there a good reason this isn’t allowed? 9 Answers 9
Can I call an overloaded constructor from another constructor of the same class in C#? 4 Answers 4
Lets say I have a concrete class Class1 and I am creating an anonymous class out of it. Object a = new Class1(){ void someNewMethod(){ } }; Now is there any way I could overload the constructor of this anonymous class. Like shown below Object a = new Class1(){ void someNewMethod(){ } public XXXXXXXX(int a){ … Read more
Are constructors allowed to throw exceptions? 6 Answers 6
Why is it possible to write constructor for an abstract class in C#? As far as I know we can’t instantiate an abstract class.. so what is it for? You can’t instantiate the class, right? 14 Answers 14
Can a constructor be private? How is a private constructor useful? 16 Answers 16
When is it right for a constructor to throw an exception? (Or in the case of Objective C: when is it right for an init’er to return nil?) It seems to me that a constructor should fail — and thus refuse to create an object — if the object isn’t complete. I.e., the constructor should … Read more
Is there any advantage for either approach? Example 1: class A { B b = new B(); } Example 2: class A { B b; A() { b = new B(); } } 15 Answers 15
Summary: I would like to call an asynchronous method in a constructor. Is this possible? Details: I have a method called getwritings() that parses JSON data. Everything works fine if I just call getwritings() in an async method and put await to left of it. However , when I create a LongListView in my page … Read more
I know that this is supposedly a super simple question, but I’ve been struggling with the concept for some time now. My question is, how do you chain constructors in C#? I’m in my first OOP class, so I’m just learning. I don’t understand how constructor chaining works or how to implement it or even … Read more
