terminology

What is the definition of a value class and reference class in C#? How does this differ from a value type and reference type ? I ask this question because I read this in the MCTS Self-Paced Training Kit (Exam 70-536). Chapter 1, Lesson 1, Lesson review 4 : You need to create a simple class or structure that contains only value types. You must create the class or structure so that it runs as efficiently as possible. You must be able to pass the class or structure to a procedure without concern that the procedure will modify it. Which of the following should you create? A reference class B

The following higher order predicate succeeds if all pairs of the list's elements are true for a given relation. Is there a common or better, more intention revealing name for this relation? My original motivation for this name was that in clpfd , there is often a constraint all_different/1 which is described as being true, iff the elements are pairwise different . In fact, rather preferred to say the elements are all different, but I have been frequently corrected (by fellow Prolog programmers) to use pairwise different. In fact, this constraint can now most naturally be expressed as pairwise

I'm studying java language for SCJP test. It is little bit hard to understand "polymorphic method". Could you explain it for me? or give me some links? "Polymorphic" means "many shapes." In Java, you can have a superclass with subclasses that do different things, using the same name. The traditional example is superclass Shape , with subclasses Circle , Square , and Rectangle , and method area() . So, for example // note code is abbreviated, this is just for explanation class Shape { public int area(); // no implementation, this is abstract } class Circle { private int radius; public Circle

Just would like to make clear, I cannot find straight answer. C# is general specification of this language done by MS, while Visual C# is implementation of this language, again done by MS? So if we say we develop in C# (in visual studio e.g.) we develop in Visual C# actually. Is that correct? Yes, you've pretty much got it. Most of us just refer to it as C# though, since it is after all a Microsoft thing, and their implementation of the language is what most coders use (in Visual Studio). An example of a C# compiler that is not Visual C# is the Mono compiler. The IDE that uses that compiler is

I have heard of types being referred to as "boxed" in some languages. In Java, I have heard of "autoboxing". What is this? Is it having wrapper classes for a type? How would my code change if I'm working with boxed or unboxed types? Some data types are considered "primitive", meaning they are not treated like an object and don't have the properties of an object. On most platforms, integers and characters are examples of types that are primitive but can be boxed. Boxing means wrapping them in an object so they have the behavior of an object. The exact meaning and behavior depends on the

What does the "Structured" word means in SQL? Is it because this(SQL) language statements are organized into Clauses, expressions and predicates? Because of this organization, is it called "Structured" ? The original full name was SEQUEL, which stood fo r "Structured English Query Language". It later had to be renamed to SQL due to trademark issues. So basically, it was yet another attempt to sell a programming language as "just like English, except with a formal syntax" (hence "structured"). As I understand it, SQL is actually an abbreviation of SEQUEL, or Structured English Query Language.

I saw the term in in this question . I think I have an idea, but not sure if this a localized term or if wide spread meaning for the term. Shotgun would implie that he might be (over) using a tool or technique much bulkier or clunkier than a simpler, more elegant solution can be found. And voodoo? Shotgun implies blindly scattering a million little bits of junk all over a problem, like the pellets in a shotgun shell; hopefully one little bit hits the mark. It's trying stuff until something works, rather then understanding what's going on. Voodoo implies doing something because of magical