dynamic-keyword

Inside an F# monad, if you say let! , the compiler translates that to a Bind member that you've defined on the monad builder. Now I see there are Query monads, as shown here on MSDN , where you can say: query { for student in db.Student do select student count } and the select and count , for example, will be translated to the QueryBuilder members Linq.QueryBuilder.Select and Linq.QueryBuilder.Count . My question is, is this mapping of keywords to members hardwired into the F# compiler, or is it extensible? For example, can I say something like: FooMonadBuilder() { bar } and somehow tell the F

I would like to write something similar to the following: // I will pass in a number of "properties" specified as strings that I want modified string[] properties = new [] { "AllowEdit", "AllowDelete" }; // Casting the component I'm using to a dynamic object of some sort ? dynamic d = myGridComponent; // Iterate over the strings and set the properties foreach(var s in properties) { //d.s = true; // //d[s] = true; // this format would be ideal } I was wondering if there was an easy way to do this without using Reflection [ .GetProperty(...).GetValue(...,...) ] using the new C# 4.0 keyword:

Friends, I must create a series of ArrayList s, each containing objects of unknown origin , with each instance assigned to a separate local variable. So far, so good... But I also need each local variable's name to follow a very specific pattern: the name should begin with "oArr", followed by one or more digits reflecting that particular array's position within the sequence. Furthermore, I will not know at compile-time how many of these arrays - and hence, how many local variables - I will be needing! It strikes me that this is perhaps a problem that could be solved by the availability of

I am trying to learn all the new goodies that come with C# 4.0. I am failing to understand the differences between the DynamicObject and ExpandoObject types. It seems like DynamicObject is used e.g. when you want to access variables from Python scripts and ExpandoObject when talking with COM/Office objects. Am I right? What is the difference in their use? Expando is a dynamic type to which members can be added (or removed) at runtime. dynamic is designed to allow .NET to interoperate with types when interfacing with dynamic typing languages such as Python and JavaScript. So, if you need to