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

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

Dynamic Languages… Consumers

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));

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

DLR Hosting ScriptRuntime ScriptScope ScriptEngine ScriptSource

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

Downloads… IronPython IronRuby DLR Source updated daily http://ironpython.codeplex.com IronRuby http://ironruby.net DLR http://dlr.codeplex.com Source updated daily

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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9/12/2018 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.