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Difference between virtual and abstract methods [duplicate]
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Virtual methods have an implementation and provide the derived classes with the option of overriding it. Abstract methods do not provide an implementation and force the derived classes to override the method.
So, abstract methods have no actual code in them, and...
How to forward declare a template class in namespace std?
and used that function in my main. I get errors. Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
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java: Class.isInstance vs Class.isAssignableFrom
...r. Other can be a class or an interface. It answers true if Other can be converted to a MyClass.
A little code to demonstrate:
public class NewMain
{
public static void main(String[] args)
{
NewMain nm = new NewMain();
nm.doit();
}
class A { }
class B extend...
How to determine device screen size category (small, normal, large, xlarge) using code?
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To get x-large detection, make sure you use target android-3.0 in your project. Or use the static value 4 for x-large.
– Peterdk
Oct 14 '11 at 16:19
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C# Error: Parent does not contain a constructor that takes 0 arguments
...arameterless parent constructor inserted. That constructor does not exist, and so you get that error.
To correct the situation, you need to add an explicit call:
public Child(int i) : base(i)
{
Console.WriteLine("child");
}
Or, you can just add a parameterless parent constructor:
protected ...
Readonly Properties in Objective-C?
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Eiko and others gave correct answers.
Here's a simpler way: Directly access the private member variable.
Example
In the header .h file:
@property (strong, nonatomic, readonly) NSString* foo;
In the implementation .m file:
/...
ASP.NET MVC Relative Paths
...("~/Scripts/jquery-1.2.6.js")%>"></script>
Or use MvcContrib and do this:
<%=Html.ScriptInclude("~/Content/Script/jquery.1.2.6.js")%>
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Which is better, number(x) or parseFloat(x)?
... they had typed '1'. The only time I really make an exception is when I am converting a style to a number, in which case parseFloat is helpful because styles come in a form like '3px', in which case I want to drop the 'px' part and just get the 3, so I find parseFloat helpful here. But really which ...
Why use the yield keyword, when I could just use an ordinary IEnumerable?
...azy. Only, it requires far less compiler generated custom ---gunk--- code. And less developer time writing and maintaining. (Of course, that was just this example)
– sehe
Dec 28 '12 at 11:57
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C++ auto keyword. Why is it magic?
...ose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen to assign to it!
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