http://ayende.comAyende @ RahienCopyright (C) Ayende Rahien 2004 - 2021 (c) 202660Dmitry, In this case, what I wanted was no reflection. The price paid for it is worth it, I think. http://ayende.com/3355/code-of-the-week#comment12http://ayende.com/3355/code-of-the-week#comment12Fri, 13 Jun 2008 10:21:21 GMTOk, but Andrey suggested an excellent duplication removal. I thought of it... what is more valuable? Avoiding reflection or avoiding duplication... In any case we have a tests ;) http://ayende.com/3355/code-of-the-week#comment11http://ayende.com/3355/code-of-the-week#comment11Fri, 13 Jun 2008 07:28:22 GMTThat involves reflection. I wanted this to be zero reflection effort http://ayende.com/3355/code-of-the-week#comment10http://ayende.com/3355/code-of-the-week#comment10Sun, 08 Jun 2008 09:42:59 GMTWhat about IDictionary<string, Func<Stream, ICommand>> CreateCommandFactories(IEnumerable<Type> types) {       return (             from type in types             select new {                   Name = type.Name.Replace("Command", "").ToLowerInvariant(),                   Factory = (Func<Stream, ICommand>)(s => Activator.CreateInstance(type, s))             }       ).ToDictionary(             x => x.Name,             x => x.Factory       ) } Of course better way would be to use Regex for parsing and Expression.Compile for constructor. http://ayende.com/3355/code-of-the-week#comment9http://ayende.com/3355/code-of-the-week#comment9Sun, 08 Jun 2008 08:58:07 GMTI like using the most abstract type possible http://ayende.com/3355/code-of-the-week#comment8http://ayende.com/3355/code-of-the-week#comment8Sat, 07 Jun 2008 05:15:07 GMTQuestion... private static IDictionary do you gain anything by using the IDictionary interface verse just using a regular Dictionary class? http://ayende.com/3355/code-of-the-week#comment7http://ayende.com/3355/code-of-the-week#comment7Sat, 07 Jun 2008 04:50:43 GMTThe more I dig into C# 3.0 the more I infatuate with it. http://ayende.com/3355/code-of-the-week#comment6http://ayende.com/3355/code-of-the-week#comment6Fri, 06 Jun 2008 21:29:31 GMTlove the dictionary lookups with the generic delegates/lambdas too. as much as i'm interested in your code, i'm doubley interested in your design process. e.g., how much analyse/OO modelling you do before you start writing real code? With tools like R#/svn is the up-front design pretty much dead for garage projects? would like to read about the steps you take before you get to code. i ask because as a sophisicated practitioner, you take intermediate working steps for granted whilst someone at my level struggles to keep up sometimes. http://ayende.com/3355/code-of-the-week#comment5http://ayende.com/3355/code-of-the-week#comment5Fri, 06 Jun 2008 17:29:53 GMTHave I just made a DSL? public static void Main(string[] args) { var me = new Person("Harry"); var you = new Person("Bob"); var options = new Dictionary<string, Action<string>>() { {"I", s => DoSomething(me, s)}, {"You", s => DoSomething(you, s)} }; Parse("I say hello", options); Parse("I jump", options); Parse("You say goodbye", options); } private static void Parse(string command, IDictionary<string, Action<string>> options) { string[] parts = command.Split(new char[] {' '}, 2); options[parts[0]](parts.Length > 1 ? parts[1] : null); } private static void DoSomething(Person who, string what) { var options = new Dictionary<string, Action<string>>() { {"say", s => who.Say(s)}, {"jump", s => who.Jump()} }; Parse(what, options); } class Person { private readonly string name; public Person(string name) { this.name = name; } public void Say(string message) { Console.WriteLine("{0} says: '{1}'", name, message); } public void Jump() { Console.WriteLine("{0} jumps", name); } } http://ayende.com/3355/code-of-the-week#comment4http://ayende.com/3355/code-of-the-week#comment4Fri, 06 Jun 2008 13:27:54 GMTSo what does it do, and why did you do it this way? http://ayende.com/3355/code-of-the-week#comment3http://ayende.com/3355/code-of-the-week#comment3Fri, 06 Jun 2008 13:20:28 GMTYou should have request commands from IoC container, not from the dictionary. http://ayende.com/3355/code-of-the-week#comment2http://ayende.com/3355/code-of-the-week#comment2Fri, 06 Jun 2008 13:18:57 GMTThey look like memcached commands http://ayende.com/3355/code-of-the-week#comment1http://ayende.com/3355/code-of-the-week#comment1Fri, 06 Jun 2008 12:22:52 GMT