Not strictly an answer to your question, but have you considered using a List instead? List<Map<String,Integer>> maps = new ArrayList<Map<String,Integer>>(); … maps.add(new HashMap<String,Integer>()); seems to work just fine. See Java theory and practice: Generics gotchas for a detailed explanation of why mixing arrays with generics is discouraged. Update: As mentioned by Drew in the comments, … Read more
Here’s what the method may look like: private static object MagicallyCreateInstance(string className) { var assembly = Assembly.GetExecutingAssembly(); var type = assembly.GetTypes() .First(t => t.Name == className); return Activator.CreateInstance(type); } The code above assumes that: you are looking for a class that is in the currently executing assembly (this can be adjusted – just change assembly … Read more
static classes are declared abstract and sealed at the IL level. So, you can check IsAbstract property to handle both abstract classes and static classes in one go (for your use case). However, abstract classes are not the only types you can’t instantiate directly. You should check for things like interfaces (without the CoClass attribute) … Read more
What you also can try is explicit instantiation: template class vector<int>; // class template int& vector<int>::operator[](int); // member template int convert<int,double>(double); // function
You can circumvent __init__ by calling __new__ directly. Then you can create a object of the given type and call an alternative method for __init__. This is something that pickle would do. However, first I’d like to stress very much that it is something that you shouldn’t do and whatever you’re trying to achieve, there … Read more
Sometimes Xcode when overrides methods adds class func instead of just func. Then in static method you can’t see instance properties. It is very easy to overlook it. That was my case.
I originally posted this answer here, but here is a reprint since this isn’t the exact same question but has the same answer: FormatterServices.GetUninitializedObject() will create an instance without calling a constructor. I found this class by using Reflector and digging through some of the core .Net serialization classes. I tested it using the sample … Read more
The Java API documentation explains why (http://java.sun.com/javase/6/docs/api/java/lang/Class.html#newInstance()): Note that this method propagates any exception thrown by the nullary constructor, including a checked exception. Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler. The Constructor.newInstance method avoids this problem by wrapping any exception thrown by the constructor … Read more
Classes are reference types, therefore – as you noticed – all array elements in var users = [User](count: howManyUsers, repeatedValue:User(thinkTime: 10.0)) reference the same object instance (which is created first and then passed as an argument to the array initializer). For a struct type you would get a different result. A possible solution: var users = … Read more
They are equivalent. If you are not coding by any code convention, use which you like better. Personally, I like to leave it out, as it is really just clutter to me.