keyword

In C, we cannot use & to find out the address of a register variable but in C++ we can do the same. Why is it legal in C++ but not in C? Can someone please explain this concept in-depth. Here's an excerpt from Section 6.7.1 (footnote 101) of the C99 standard (pdf) : The implementation may treat any register declaration simply as an auto declaration. However, whether or not addressable storage is actually used, the address of any part of an object declared with storage-class specifier register cannot be computed , either explicitly (by use of the unary & operator as discussed in 6.5.3.2) or

I have some JSON that I am deserializing using Gson. { "resp": { "posts": [ { ... "public": true, ... }] } My problem is that public is a Java keyword, so how would I make a field in my class that correlates with the public field in the JSON? You could use a different name for your field, using gson's Field Naming Support . public class Post { @SerializedName("public") private boolean isPublic; ... } Worth a quick note that you need to include gson.annotations or SerializedName for this to compile as not part of the base gson.Gson package: import com.google.gson.annotations.SerializedName; 来源：

Why would you declare a method as "virtual". What is the benefit in using virtual? The Virtual Modifier is used to mark that a method\property(ect) can be modified in a derived class by using the override modifier. Example: class A { public virtual void Foo() //DoStuff For A } class B : A { public override void Foo() //DoStuff For B //now call the base to do the stuff for A and B //if required base.Foo() } Virtual allows an inheriting class to replace a method that the base class then uses. public class Thingy { public virtual void StepA() { Console.Out.WriteLine("Zing"); } public void Action(

When should one use dynamic keyword in c# 4.0?.......Any good example with dynamic keyword in c# 4.0 that explains its usage.... Dynamic should be used only when not using it is painful . Like in MS Office libraries. In all other cases it should be avoided as compile type checking is beneficial. Following are the good situation of using dynamic. Calling javascript method from Silverlight. COM interop. Maybe reading Xml, Json without creating custom classes. user2415376 How about this? Something I've been looking for and was wondering why it was so hard to do without 'dynamic'. interface

This question already has an answer here: What is the VB.NET equivalent of the C# “var” keyword? 1 answer Is there a VB.NET equivalent to the C# var keyword? I would like to use it to retrieve the result of a LINQ query. Adam Robinson Option Infer must be on in order for this to function properly. If so, then omitting the type in VB.NET (Visual Basic 9) will implicitly type the variable. This is not the same as "Option Strict Off" in previous versions of VB.NET, as the variable is strongly-typed; it's just done so implicitly (like the C# var ) keyword. Dim foo = "foo" foo is declared as a