An Introduction To Ironruby And The Dynamic Language

Jacinto A. Limjap, Jr.

Microsoft MVP for Visual C# Senior Software Design Engineer, Cormant Technologies

 Dynamic

Typed Languages  Why they matter  The Dynamic Language Runtime  A brief history of Ruby, RoR, and IronRuby  What’s so cool about Ruby?  Quirks  Next steps

 Type checking is done at runtime  Fewer or no type checking  Most of them  Examples:

are interpreted

 Expressive syntax  Object-oriented  Duck typing  Object runtime

alteration  Metaprogramming

 Allows

dynamic languages to run on top of CLR  Compilation process

 Allows

for dynamic languages to run on top of the .NET Framework

Conceived and written by Yukihiro Matsumoto in the mid 1990s  A “balance between imperative and functional programming”  Gained huge popularity after David Heinemeir Hansson came out 

Open source project headed by John Lam since 2007  Matched with Ruby 1.8.6 specification  Released under Microsoft Public License  IronRuby 0.5.0 was released last May 20, 2009 

 Object

oriented

 Everything,

including literals, methods, and classes, are objects!  “True” object orientation as opposed to “class-oriented programming”

 Expressiveness  Allows for high

readability, and potentially higher maintainability  Allows for more succint code  Less code = less mistakes

 Duck

Typing

 If it quacks like a

duck, it’s a duck!  If an object contains the methods called by another method, it’s good to go  Look ma, no interfaces!

 Object

runtime alteration  Objects can be

changed to a different type during runtime  Objects can be extended at runtime

 No

Visual Studio / intellisense support... yet  No LINQ tools... yet  No WPF databinding... yet  Not sure if it make it to .NET 4.0/Visual Studio 2010

More languages, more options  DLR gives apps instant scripting abilities  C# is moving in that direction too! 

 LINQ  Lambda expressions  Parallel extensions

(C# 4.0)  ‘dynamic’ (C# 4.0) and ‘var’ keywords

C# 4.0 C# 3.0 C# 2.0 C# 1.0

Dynamic Programming

Language Integrated Query

Generics

Managed Code

 Polyglot

programmer trend

 Use the best language for the job

 Scripting

capabilities for the .NET Framework  IronRuby to have better support for Visual Studio as it progresses  More demo apps are becoming available as we speak  Next MSDN Session!: IronRuby on ASP.NET MVC

 www.ironruby.net  http://ironruby.codeplex.com  Why’s (poignant) guide to Ruby:

http://poignantguide.net/ruby  IronRuby and Silverlight demos:

http://github.com/jschementi/mix09/tree/mast  Getting Ready with Iron Ruby and RSpec, Part 1: http://msdn.microsoft.com/en-us/magazine/dv

 Learning

Ruby via IronRuby and C#

series: http://codethinked.com/post/2008/07/21  IronRuby presentation slides and demo code http://devpinoy.org/blogs/cruizer/archive

 Blog: http://dotnet.kapenilattex.com  Twitter: http://twitter.com/LaTtEX  Email: [email protected]  Microsoft Forums:

http://msforums.ph/forums  MSDN Philippines: http://msdnphilippines.net/blogs/limjap

© 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.