A general introduction to the Ruby language and ecosystem from a .NET Developer's perspective.

1. a bunch of reasons to love ruby

2. class Ben < Personis_a :mvp, :scrummaster, :aspinsider def initialize @book = “ASP.NET MVC in Action” @twitter = “subdigital” @blog= “http://flux88.com” @iphone_app= “Pocket Tabs” end ...end

3. def self.expert? falseend

4. Meet Ruby puts“hello world”hello world puts“hello world”.reversedlrowolleh puts“hello world”[0..5] hello

5. Ruby Variables num = 323 message = “Hey there” stuff = [1, “foo”, true]

6. Ruby Loops [“cat”, “dog”, “giraffe”].each do |s| puts s end [“cat”, “dog”, “giraffe”].each { |s| puts s }

7. Working with Arrays animals = [“zebra”, “donkey”, “lemur”] animals.sort[“donkey”, “lemur”, “zebra”] # original array is untouched animals.sort! # original array is modified! animals.delete“zebra” [“donkey”, “lemur”]

8. Ruby has Less Ceremony //C# Dictionary<string, object> hash = new Dictionary<string, object>(); #ruby hash = {} #optional semicolons & parentheses add(5, 6); is the same as add 5, 6

9. You Can Extend Existing classes 5.days.from_now

10. Ruby is Terse, yet Readable 3.times { print “Ho ” } => Ho Ho Ho approve_credit unless account.deliquent? send_email if email_enabled?

11. Regex is a 1st class citizen [“red”, “blue”, “green”].grep /u/ blue “The Times They are a-Changin’”.gsub //, “.” The.Times.They.are.a-Changin’

12. Everything is an Object 42.class FixNum 42.2.class.superclass  Integer 42.class.superclass.superclass  Numeric 42.class.superclass.superclass.superclass  Object No, really… everything is an object puts customer.name unless customer.nil? nil.classNilClass nil.class.superclass Object

13. RubyGems gem installhpricot

14. Speaking of hpricot… require ‘rubygems’ require ‘hpricot’ require ‘open-uri’ uri = open(“http://whatsit.org”) doc = Hpricot(uri) (doc/"p/a/img").each do |img| puts img.attributes['class'] end

15. Rake task :codeGen do # do the code generation end task :compile => :codeGen do #do the compilation end task :dataLoad => :codeGen do # load the test data end task :test => [:compile, :dataLoad] do # run the tests end

16. RSpec # bowling_spec.rb require 'bowling' describe Bowling do it "should score 0 for gutter game" do bowling = Bowling.new 20.times { bowling.hit 0 } bowling.score.should == 0 end end

17. …and now the elephant in the room rails

18. Rails is the bee’s knees because… convention configuration

19. Rails is the bee’s knees because… it has ActiveRecord

20. Rails is the bee’s knees because… it has Migrations

21. Rails is the bee’s knees because… it has the Console

22. Rails is the bee’s knees because… scaffolding

23. Rails is the bee’s knees because… Logging is built-in

24. Rails is the bee’s knees because… Tests come out of the box

25. Rails is the bee’s knees because… There is ONE WAY

26. What else? heroku

27. What else? IronRuby

28. thank_you