I have two classes: a base class, Foo::Base and a derived class, Foo::Base::Sub.I want to have Foo::Base::Sub do some type and data checking on the constructor`s argument--a hash--before blessing it.I
I am working on an interpreter for a toy language, just to learn about building an interpreter. I have already implemented a simple parser for the grammar that generates a parse tree. Now, the usual w
For SCJP most of the time question such as below is asked to find valid example of polymorphic method calls. But what should one exactly look for to find is it polymorphic use or not ?
class BaseClass { private void f() { System.out.println(\"Baseclass f()\"); } public static void main(String[] args) {
In the ocaml language specification, there\'s a short section: poly-typexpr ::= typexpr { \' ident }+ . typexpr
I have a Windows WCF serivce and Web client. My service has one method [OperationContract] SubmitOrder(OrderInfo info)开发者_开发百科....
i needed help refactoring the following class, Following is a class Operation with variety of Operations in switch :
i\'m just reading meyers \"More Effective C++ 35 New Ways\" - item 33, and he suggest there always to inherit from an abstract base class, and not a concrete.
I\'m running into an issue with an existing ActiveRecord::Observer model that records various Activities of a User the site. Everything was working really well, until I tried to observe the User class
We have a parent model Vehicle that is inherited to make classes Car, Truck, SUV. In our form, we allow the user to edit the data for a bunch of Vehicles, and one of the attributes for each vehicle is
加载中,请稍侯......