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  • 1. AMIR BARYLKO IRON RUBY AND .NET A MATCH MADE IN HEAVEN .NET USER GROUP SEP 2010Amir Barylko - RoR Training MavenThought Inc. - June 2010
  • 2. WHO AM I? • Architect • Developer • Mentor • Great cook • The one who’s entertaining you for the next hour!Amir Barylko - RoR Training MavenThought Inc. - June 2010
  • 3. CONTACT AND MATERIALS • Contact me: amir@barylko.com, @abarylko • Download: http://www.orthocoders.com/presentations.Amir Barylko - RoR Training MavenThought Inc. - June 2010
  • 4. RUBY INTRO Dynamic languages Testing IRB ConstructsAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 5. DYNAMIC LANGUAGES  High level  Dynamically typed  Runtime over compile time  Closures  Reflection  Platform independentAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 6. .NET CLR Iron Ruby DLR CLRAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 7. DEVELOPERS TOOLBOX • Make your toolbox grow! • The right tool for the job • Not a replacement • Combine strengths • Problem solvingAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 8. WELCOME TO RUBY  Created in mid-90s by  Several implementations: “Matz” Matsumoto in Japan MRI, YARB, JRuby  Smalltalk, Perl influences  Totally free!!  Dynamic typing  Object Oriented  Automatic memory managementAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 9. RUBY FEATURES  Everything is an expression  Operator overloading, flexible syntax  Metaprogramming  Powerful standard library  Closures  Garbage collection  ExceptionsAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 10. RUBY SUPPORT  Hundreds of books  Lots of great web sites: basecamp, twitter, 43  User conferences all over things, hulu, scribd, the world slideshare, Justin.tv  Active community (you can  Lots of web frameworks create a conf in your own inspired by Ruby on Rails city and top Ruby coders will go there to teach others, invite them and see)Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 11. SET UP  Download IronRuby installer  Put the bin folder on the path  That’s it!Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 12. INTERACTIVE IRON RUBY SHELL c:> ir.exe > x = 1.upto(5).to_a > puts “hello” => [1, 2, 3, 4, 5] hello => nil > x.join => "12345" > "Hello World! " * 2 => "Hello World! Hello World! " > ((1 + 5) * 3) ** 2 => 324Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 13. BASIC TYPES  Numbers 1.class => Fixnum 1.1.class => Float (120**100).class => Bignum 3.times {puts “he “}Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 14. BASIC TYPES II • Strings he + he => he he “Thats right” => Thats right He said “hi” => He said “hi” “He said “hi”” => He said “hi” “1 + 1 is #{1+1}” => 1 + 1 is 2 "#{Ho! *3}Merry Christmas" =>Ho! Ho! Ho! Merry ChristmasAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 15. BASIC TYPES III  Arrays a = [1, 5.5, “nice!”] 1 == a.first 1 == a[0] nil == a[10] a[1] = 3.14 a.each {|elem| puts elem} a.sortAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 16. BASIC TYPES IV • Hashes h = {“one” => 1, 1 => “one”} h[“one”] == 1 h[1] == “one” h[“two”] == nil h.keys == [“one”, 1] (or is it [1, “one”] ?) h.values == [“one”, 1] (or is it [1, “one”] ?) h[“one”] = 1.0Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 17. BASIC TYPES V  Symbols: constant names. No need to declare, guaranteed uniqueness, fast comparison :apple == :apple :orange != :banana [:all, :those, :symbols] {:ca => “Canada”, :ar => “Argentina”, :es => “Spain”}Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 18. CONTROL STRUCTURES  if if count < 20 puts “need more” elsif count < 40 puts “perfect” else puts “too many” end  while while count < 100 && need_more buy(1) endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 19. CONTROL STRUCTURES II  Statement modifiers buy while need_more? buy(5) if need_more? buy until left == 0 buy unless left < 5Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 20. CONTROL STRUCTURES III • Case case left when 0..5 dont_buy_more when 6..10 buy(1) when 10..100 buy(5) endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 21. METHODS  Simple def play(movie_path) .... end  Default arguments def play(movie_path, auto_start = true, wrap = false) .... endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 22. METHODS II  Return value: the last expression evaluated, no need for explicit return def votes(voted, num_votes) voted && num_votes || nil end  No need for parenthesis on call without arguments (same syntax to call a method and a field) buy() == buy movie.play() == movie.playAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 23. METHODS III  No need also with arguments (but careful!! only if you know what you are doing) movie.play “Pulp fiction”, false, trueAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 24. RUBY INTRO II Classes Mixin EnumerableAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 25. CLASSES & OBJECTS  Initializer and instance variables class Movie def initialize(name) @name = name end def play puts %Q{Playing “#{@name}”. Enjoy!} end end m = Movie.new(“Pulp fiction”) m.play => Playing “Pulp fiction”. Enjoy!Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 26. CLASSES & OBJECTS II  Attributes class Movie def initialize(name) @name = name end } def name # attr_reader :name @name end # attr_accessor :name def name=(value) # attr_writter :name @name = value end end m = Movie.new(Brazil).name = “Pulp fiction”Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 27. CODE ORGANIZATION  Code in files with .rb extension  Require movie will read movie.rb file and make its methods available to the current file  Require media/movie will read file from media dir relative to the current working dir $LOAD_PATH << media require movieAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 28. CODE ORGANIZATION II  Relative to this file: require File.join(File.dirname(__FILE__), media/movie)Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 29. MIXINS  What about module “instance methods”?  One of the greatest Ruby features!  You can define functions in Modules, and get them added to your classes.  Great code reuse,  Multiple inheritance alternative.  Code organizationAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 30. ENUMERABLE  Enumerable mixin, from the standard library documentation: The Enumerable mixin provides collection classes with several traversal and searching methods, and with the ability to sort. The class must provide a method each, which yields successive members of the collectionAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 31. ENUMERABLE II  It provides useful methods such as:  map  to_a  take_while  count  injectAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 32. EXAMPLES rSpec Enumerable Mixin missing_method Sinatra BDD Cucumber DSLAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 33. RSPEC TESTING LIBRARY require File.dirname(__FILE__) + "/../main/MavenThought.MovieLibrary/bin/Debug/MavenThought.MovieLibrary.dll" require rubygems require spec include MavenThought::MovieLibrary describe Library do it "should be created empty" do lib = Library.new lib.contents.should be_empty end it "should add an element" do lib = Library.new m = Movie.new Blazing Saddles lib.add m lib.contents.should include(m) lib.contents.count.should == 1 end endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 34. EXTEND LIBRARY WITH METHOD MISSING require File.dirname(__FILE__) + "/../main/MavenThought.MovieLibrary/bin/Debug/MavenThought.MovieLibrary.dll" require rubygems include MavenThought::MovieLibrary # Extend library to use method missing to add find_by class Library def method_missing(m, *args) if m.id2name.include?( "find_by" ) field = m.id2name.sub /find_by_/, "" contents.find_all( lambda{ |m| m.send(field) == args[0] } ) else super end end end l = Library.new l.add Movie.new(Blazing Saddles, System::DateTime.new(1972, 1, 1)) l.add Movie.new(Spaceballs, System::DateTime.new(1984, 1, 1))Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 35. SIMPLE WEB WITH SINATRA require rubygems require sinatra require haml require singleton require File.dirname(__FILE__) + "/../main/MavenThought.MovieLibrary/bin/Debug/MavenThought.MovieLibrary.dll" include MavenThought::MovieLibrary class Library include Singleton end # index get / do @movies = Library.instance.contents haml :index end # create post / do m = Movie.new(params[:title]) Library.instance.add m redirect / endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 36. BDD WITH CUCUMBER Feature: Addition In order to make my library grow As a registered user I want to add movies to the library Scenario: Add a movie Given I have an empty library When I add the following movies: | title | release_date | | Blazing Saddles | Feb 7, 1974 | | Young Frankenstein | Dec 15, 1974 | | Spaceballs | Jun 24, 1987 | Then The library should have 3 movies And "Blazing Saddles" should be in the list with release date "Feb 7, 1974" And "Young Frankenstein" should be in the list with release date "Dec 15, 1974" And "Spaceballs" should be in the list with release date "Jun 24, 1987"Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 37. CUCUMBER STEPS require File.dirname(__FILE__) + "/../../main/MavenThought.MovieLibrary/bin/Debug/MavenThought.MovieLibrary.dll" include MavenThought::MovieLibrary Given /^I have an empty library$/ do @lib = Library.new end When /^I add the following movies:$/ do |table| table.hashes.each do |row| movie = Movie.new row[:title], System::DateTime.parse(row[:release_date]) @lib.add movie end end Then /^The library should have (.*) movies$/ do |count| @lib.contents.count.should == count.to_i end Then /^"([^"]*)" should be in the list with release date "([^"]*)"$/ do |title, release| @lib.contents.find( lambda { |m| m.title == title and m.release_date == System::DateTime.parse(release) } ).should_not be_nil endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 38. DSL I RAKE task :default => [:build] desc "Builds the project" task :build do call_target msbuild_cmd, :build end desc "Rebuild the application by cleaning and then building" task :rebuild => [:clean, :build] do #nothing to do.... end desc "Runs all the tests" task :test => ["test:all"]Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 39. DSL II CRON - WHENEVER every 10.minutes do runner "MyModel.some_process" rake "my:rake:task" command "/usr/bin/my_great_command" end every 2.days, :at => 4:30am do command "/usr/bin/my_great_command" endAmir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010
  • 40. QUESTIONS? (Don’t be shy)
  • 41. CONTACT AND MATERIALS • Contact me: amir@barylko.com, @abarylko • Download: http://www.orthocoders.com/presentations.Amir Barylko - RoR Training MavenThought Inc. - June 2010
  • 42. ONLINE RESOURCES  IronRuby: http://ironruby.net/  The Ruby Bible (a.k.a. Pickaxe) http://ruby-doc.org/docs/ProgrammingRuby/  Ruby language site: http://www.ruby-lang.org Amir Barylko - Iron Ruby and .NET MavenThought Inc. - Sep 2010