1. Using Dynamic Languages to Build Scriptable Apps
FT30
Using Dynamic Languages to Build Scriptable Apps
Dino Viehland
Senior Software Development Engineer
Microsoft

2. Why dynamic languages? Simple enough for non-programmers
Capable enough for programmers
“Python, like many good technologies, soon spreads virally throughout your development team and finds its way into all sorts of applications and tools…Python scripts are used in many areas of the game.”
Mustafa Thamer, Civilization IV development team
Let users improve your application
Create an Application Ecosystem
Users can share scripts, adding value to your apps
Virtuous cycle
Enable Quick Fixes in the field

3. Dynamic Languages…
Consumers

4. Keeping it Simple def fact(n) def fact(n): return 1 if n == 0
    n * fact(n-1)
end
puts fact(13)
def fact(n):
if n == 0:
return 1
return n * fact(n-1)
print fact(13)
using System;
public class MathClass {
public static int Factorial(int n) {
if (n == 0) {
return 1; }
return n * Factorial(n – 1);
public static void Main(string[] args) {
Console.WriteLine(Factorial(13));

5. Dynamic Language Runtime
Infrastructure for creating dynamic languages
More languages available
Shared interop protocol
Dynamic languages can talk to each other
Static languages can talk to dynamic languages
Lightweight hosting API
One API, multiple languages
Users can choose the best language

6. DLR Hosting
ScriptRuntime
ScriptScope
ScriptEngine
ScriptSource

7. Demo - Hosting Getting Started Getting Languages Scopes
Injecting our object model
Getting delegates back
Working with classes
Using C# Dynamic
Getting More Dynamic

8. Downloads… IronPython IronRuby DLR Source updated daily
IronRuby
DLR
Source updated daily

9. Summary Scripting Languages can extend your application
DLR provides common APIs for multiple languages
DLR enables C# and VB.NET to seamlessly access

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Built by Developers for Developers….
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

12. 9/12/ :11 PM
© 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

13. 9/12/ :11 PM
© 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.