Andrew Davey

Re: Expressions everywhere

You should check out Nemerle if feels very much like C#, but with everything (within a method) being an expression.

Charges for "compute" are applied even when an instance is idle. So a website that does nothing will cost $86.40 per month!

There must be a fairer use model possible. Google App Engine seems to manage it.

Will we ever see a Microsoft backed version of Haskell for .NET?

I keep asking Nikhil about open sourcing Script# and he keeps ignoring me
I'm going to keep using it for now. Nikhil does at least release new versions semi-regularly. Please contact him yourself as well to maintain community pressure to open source Script#!

The code is now online here:

www.aboutcode.net/files/SplitModel.zip

You will also need to install my code generator tool. This is used to generate code from XML files.

www.aboutcode.net/files/Equin.CodeGenerator.zip

So I reckon phase two is to use my tier-splitting macro to enable certain model methods to be decorated with [RunAtServer] attributes.
The macro would do all the plumbing to call the server and execute the model there. This would allow a totally seemless Model class to be written. With the client part ending up in JavaScript and the server part being C#.

Seeing as client-side MVP is viable, the next step would be create a framework to reduce some of the boiler-plate coding required. For example, the View class that basically maps to and from DOM elements could probably be code generated.

Thanks for the link to ProMesh.NET, I like the use of attributes making the whole process much more declarative. I'll certainly be considering similar approachs when expanding my client-side MVP framework.

It depends on if you need the reader or not. Sometimes I need to know that no records were returned.

A good approach would be to have an overloaded method. One that passes the reader, another that passes each data record.

I hope people find this pattern useful and adapt it to meet their needs as you have done
Also, does anyone know if this pattern has a name?

Quite simply, the best video I have seen for a while on Channel 9!
Quick, snappy, fun and interesting. I look forward to more in this style.
Keep hunting down the devs!

It played fine for me (playing it embedded in C9 website).

I think you can replace "(sender, e)" with just "()" - or at least I hope it'll support that!

C#3.0 is looking sweeeet!

ktr wrote:


// to this (C# 3) ------------------------------------

button1.Click += (sender, e) => doSomething();
// i think you can do that ^ ... lol

Excellent video!
I downloaded the C# code and took a quick look.
Good work with the runtime proxy generation. Geez, it must have been painful writing all that emit IL code!

I'll take a look at writing some Nemerle macros to make the syntax nice. I'm thinking macros along the lines of:

foo = atomic(Foo(arg1, arg2))
<==>
foo = XAction.MakeFactory(typeof(Foo)).Create(arg1, arg2) : Foo;
-------------------------
atomic(foo.Bar(x,y,z))
<==>
XAction.Run(XStart(foo.Bar), x, y, z);
--------------------------
retry
<==>
XAction.Retry();
--------------------------
y = attempt { Get1, Get2 } (arg1, arg2)
<==>
y = XAction.Run(XAction.OrElse(new XStart(Get1), new XStart(Get2)), arg1, arg2) : int;

y = attempt {Get1, Get2, Get3} (arg1, arg2)
<==>
y = XAction.Run(XAction.OrElse(XAction.OrElse(new XStart(Get1), XAction.OrElse(new XStart(Get2), new XStart(Get3)))), arg1, arg2) : int;