While designing a table my colleague here says that I should avoid identity column as it is specific to SQL Server and MS Access, But I differ with his views as it makes my coding simpler. Should I use identity column or not? If not what is best way to create the identity columns from application code? ...
I was looking for a pattern to model something I'm thinking of doing in a personal project and I was wondering if a modified version of the decorator patter would work. Basicly I'm thinking of creating a game where the characters attributes are modified by what items they have equiped. The way that the decorator stacks it's modification...
I have a class hierarchy as such: +-- VirtualNode | INode --+ +-- SiteNode | | +-- AbstractNode --+ | +-- SiteSubNode And a corresponding NodeCollection class that is build on INode. In order to display a NodeCollect...
Let me start by saying I'm a huge fan of the elegance of this pattern -- I have a group of basic entities that I have implemented builders for (specifically for testing). However I have found (and this may be the caveat) that as my program evolved I kept having to go back and re-work the builders. In the end, it really hasn't seemed wo...
Running FxCop on my code, I get this warning: Microsoft.Maintainability : 'FooBar.ctor is coupled with 99 different types from 9 different namespaces. Rewrite or refactor the method to decrease its class coupling, or consider moving the method to one of the other types it is tightly coupled with. A class coupling above ...
What are some best practices to orchestrate the interaction between complex components that are in your View? I'm not talking about simple widgets like a combo box or a grid control but components that are made up of multiple widgets and that may deserve being unit tested on their own. Would you: Define abstract interfaces for each c...
I am still trying to wrap my head around design patterns and for the second time I'm coming up against the same problem that seems to be crying out for a pattern solution. I have an accounts system with multiple account types. We have restaurant, hotel, service_provider, and consumer account types. Im sure there will be more business a...
I need to build a little webapp but I'm not sure what is the best thing to do. A person that subscribe the petition is signing an email sent to X. This will be also saved to a db in order to show online who subscribed. The idea is to have a standard text message, the user submit his name and that name goes into the message as signature...
I have a large collection of data in an excel file (and csv files). The data needs to be placed into a database (mysql). However, before it goes into the database it needs to be processed..for example if columns 1 is less than column 3 add 4 to column 2. There are quite a few rules that must be followed before the information is persiste...
What is the difference between applying the visitor design pattern to your code , and code like the following : interface Dointerface { public void perform(Object o); } public class T { private Dointerface d; private String s; public String getS() { return s; } public T(String s) { t...
I have 2 classes for accessing the database: MovieDAO - access database using "select" statements only; the purpose is for retrieving data for displaying in the web browser. and MovieExtendedDAO (extends MovieDAO) - which is more complete and allows for creating/updating/deleting a movie in addition to the inherited functionality. Th...
I want to do this (no particular language): print(foo.objects.bookdb.books[12].title); or this: book = foo.objects.bookdb.book.new(); book.title = 'RPC for Dummies'; book.save(); Where foo actually is a service connected to my program via some IPC, and to access its methods and objects, some layer actually sends and receives messag...
Hi all, I am developing a C++ domain model class library which should provide some facilities or a framework (i.e. interface classes etc) for writing/reading class instance data to/from both a binary file and a RDBMS. The basis for this library is an application that uses a RDBMS, and there are several methods which instantiate a class ...
When I am developing a bunch of designers/tools, what are some of the best fit patterns that go with a VSX Package and/or VSX Isolated Shell Package? Any samples, links would be great. ...
Are there any other sources of programming type riddles on the internet? I started my set of daily programming riddles, jokes, and quotes partly to help myself and my team grown in some technical areas... like new .NET 3.5 features, design patterns, anti-patterns, code smells, etc. I would love to find other short programming riddles o...
In my MEF usage, I have a bunch of imports that I want to make available in many other parts of my code. Something like: [Export (typeof (IBarProvider))] class MyBarFactory : IBarPovider { [Import] public IFoo1Service IFoo1Service { get; set; } [Import] public IFoo2Service IFoo2Service { get; set; } [Import] public IFoo3Service ...
It seems like Microsoft had a great idea with the ObservableCollection. They are great for binding, and are super fast on the UI. However, requiring a context switch to the Dispatcher Thread every time you want to tweak it seems like a bit much. Does anyone know the best practices for using them? Is it simply to populate an ICollecti...
I need to model a system where by there will be a team who will consist of users who perform roles in the team and have skills assigned to them. i.e. a team A 5 members, one performs the team leader role, all perform the reply to email role, but some have an extra skill to answer the phone I'm trying to determine how I can best model t...
How would one create a Singleton class using PHP5 classes? ...
The C++ friend keyword allows a class A to designate class B as it's friend. This allows Class B to access the private/protected members of class A. I've never read anything as to why this was left out of C# (and VB.NET). Most answers to this earlier StackOverflow question seem to be saying it is a useful part of C++ and there are go...