Comment Feed for Channel 9 - Channel Live at BUILD: Q&A with Anders Hejlsberg http://ch9files.blob.core.windows.net/ch9/fb50/c2844195-6fde-4bfe-bed5-9f6c0166fb50/C9LiveBUILDAndersHejlsberg_220_ch9.jpg Channel 9 - Channel Live at BUILD: Q&A with Anders Hejlsberg Anders Hejlsberg takes questions from #Ch9Live at the BUILD conference. en Mon, 20 May 2013 04:52:19 GMT Mon, 20 May 2013 04:52:19 GMT Rev9 Re: Channel Live at BUILD: Q&A with Anders Hejlsberg Thats me thats me! i'm live on tv! Well.. At least my twitter profile in the background..

posted by philjay

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532657450286488 Mon, 03 Oct 2011 19:09:05 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532657450286488 philjay Re: Channel Live at BUILD: Q&A with Anders Hejlsberg
(e.g. deffun[0]= "int f(int x){return 1*x*x};",
deffun[1]= "int f(int x){return 2*x*x};",
deffun[2]= "int f(int x){return 3*x*x};" etc.)

then I would like to dynamically test all these definitions

ScriptEngine engine = new ScriptEngine();
Session session = Session.Create();
for(int i=0;i<1 000 000;i++)
{
engine.Execute("using System;");
engine.Execute( deffun[i] , session );
engine.Execute("Console.WriteLine( f(2) )",session);
}

Is it possible to run this code?
I suspect no but if yes then what will happen
to the size of the program?

Is it possible to redefine the function at runtime?

I am using 1 000 000 different definitions of the function f.
Is the memory released after the new definition of f was applied?

If I solve that problem by using dynamic compilation, then as far as I know, I can compile 1000 000 definitions of the function f, then I can call that function by using reflection but the assembly which contain the definition of the function will stay in the program and it cannot be unloaded. Then after I will do that 1000 000 times the program will be much bigger than the original and there is no way (except unload appdomain) to reduce the size of the program.

Do I have similar problems in the "Roslin" compiler? What will happen to the size of the program if I compile 1000 000 definitions of the same function (if that is possible ... maybe I need to rewrite the code)?

Let's say that I would like to write some command line app which compile dynamically c# code and test it. If the memory is not released, then the application will crash due to the lack of system resources after some time (Am I right?).

posted by Jedrek

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532905501690219 Tue, 04 Oct 2011 02:02:30 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532905501690219 Jedrek Re: Channel Live at BUILD: Q&A with Anders Hejlsberg @Jedrek: "Is it possible to redefine the function at runtime?"

With CLR re-JITing, I think so.

 

posted by Richard.Hein

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532916728225738 Tue, 04 Oct 2011 02:21:12 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532916728225738 Richard.Hein Re: Channel Live at BUILD: Q&A with Anders Hejlsberg
http://channel9.msdn.com/Shows/Going+Deep/CLR-45-David-Broman-Inside-Re-JIT

old definition of the function will stay in the memory. So after I will do that 1000 000 times that may be a problem. So writing some testing program for c# code in this way may not be not very practical.

posted by Jedrek

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532922584035820 Tue, 04 Oct 2011 02:30:58 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634532922584035820 Jedrek Re: Channel Live at BUILD: Q&A with Anders Hejlsberg @Jedrek:  I see.  Thanks.

posted by Richard.Hein

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533269878687938 Tue, 04 Oct 2011 12:09:47 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533269878687938 Richard.Hein Re: Channel Live at BUILD: Q&A with Anders Hejlsberg
Did not watch the whole video because of that guy!

posted by Mikael N

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533586477752661 Tue, 04 Oct 2011 20:57:27 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533586477752661 Mikael N Re: Channel Live at BUILD: Q&A with Anders Hejlsberg @Mikael N: Not really the case, though I can see how you've come this conclusion... As a moderator, or host or anchor, for a live broadcast there are always at least 3 things to keep track of simultaneously... These aren't interviews like I do with my camera. These are first and foremost for YOU the audience to ask questions over twitter and drive the conversation - otherwise doing this stuff is pointless. It's live for a reason. In my defense, I have to monitor the questions coming in on the monitor you can't see. That takes focus. I have somebody occasionally talking in the earpiece you may or may not have noticed and further and of course I have to carry a conversation with the guest.

It's hard being an anchor or host in a live broadcast environment. You should try it sometime...

I absolutely wanted to be there. It's great to talk to Anders (and with all the guests I host on C9 Live). This C9 Live broadcast - at BUILD - was the hardest one yet for some reason. Not sure what was so distracting or different than usual, but it was.

C

posted by Charles

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533623776718500 Tue, 04 Oct 2011 21:59:37 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533623776718500 Charles Re: Channel Live at BUILD: Q&A with Anders Hejlsberg It would help me if the language had a "factory" facility. Where you have a hierarchical structure of abstract base classes and derived classes. I write a static method in each derived class that is used to determine if the derived class is the one to be newed up from the input. And then a 2nd static method that actually news up the object.  The hassle comes in having to write the code that iterates thru the collection of classes, calling the static "Is this the class to new up" method. And then calling the static "create yourself" method.  I use reflection  for this. Which is OK. But a language feature would be nice.

 

posted by SteveRichter

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533664099857046 Tue, 04 Oct 2011 23:06:49 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533664099857046 SteveRichter Re: Channel Live at BUILD: Q&A with Anders Hejlsberg I don't follow how having a feature in C# where an event is signalled or a method is called when a property is changed would tie the language to the windows platform.

posted by SteveRichter

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533666854206056 Tue, 04 Oct 2011 23:11:25 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634533666854206056 SteveRichter Re: Channel Live at BUILD: Q&A with Anders Hejlsberg can you create Artificial intelligence programming language or syntax in c# programming environments.
prolog syntax and compilers is hard for programming.

thanks.
bye.

posted by k anen

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634537407598739545 Sun, 09 Oct 2011 07:05:59 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634537407598739545 k anen Re: Channel Live at BUILD: Q&A with Anders Hejlsberg I see that it is possible to redefine the function at runtime.

This is amazing!

posted by Jedrek

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634550036301906380 Sun, 23 Oct 2011 21:53:50 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634550036301906380 Jedrek Re: Channel Live at BUILD: Q&A with Anders Hejlsberg Something's wrong:

High Quality WMV <-> 253MB
Mid Quality WMV <-> 290MB

?!

posted by d_AJ

]]> http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634611712476688159 Tue, 03 Jan 2012 07:07:27 GMT http://channel9.msdn.com/Events/Ch9Live/Channel-9-Live-at-BUILD/C9L201#c634611712476688159 d_AJ