The document discusses advanced Ruby programming concepts, including open classes and dynamic methods, illustrated with examples. It explains how to use metaprogramming techniques, such as monkey patching and dynamically calling methods, within Ruby applications. Additionally, there is a reference to resources on further learning about Ruby metaprogramming.

1. Ruby: Beyond the Basics
by Michael Koby
http://www.codecasts.tv

2. Hi, my name is...
Michael Koby

3. @mkoby

4. http://www.codecasts.tv

5. http://www.mkoby.com

6. What

7. What
• Open Classes

8. What
• Open Classes
• Dynamic Methods

9. Metaprogramming Ruby
by Paolo Perrotta
O’Reilly: http://obyk.us/39267
Amazon: http://obyk.us/1efe7

10. Open Classes

11. What is an “Open Class?”

12. You’ve Heard
of this by
Another Name

13. Monkeypatching

15. class String
#shortened for brevity
def sub(a, b)
#replaces string ‘a’ with string ‘b’
end
def gsub(a, b)
#similar to sub but with the /g from RegEx
end
#shortened for brevity
end

17. class String
def to_alphanumeric
gsub /[^ws]/, ‘’
end
end

18. 1.9.3 :005 > “my string”.methods.grep /alphanumeric/

19. => [:to_alphanumeric]

21. class Employee
def salary
“Some Number”
end
end

22. class Employee
def salary
“Some Number”
end
end
class Employee
def name
“Some Name”
end
end

24. e = Employee.new

25. e = Employee.new
e.salary

26. e = Employee.new
e.salary # => “Some Number”

27. e = Employee.new
e.salary # => “Some Number”
e.name

28. e = Employee.new
e.salary # => “Some Number”
e.name # => “Some Name”

29. class Employee
def salary
“Some Number”
end
end
class Employee
def name
“Some Name”
end
end

30. Some Real Life Samples

31. Dynamic Methods

32. How You Usually Call Methods

34. someObject.methodName

35. Dynamically Calling Methods

37. x = 2

38. x = 2
x.send(:+, 2)

39. x = 2
x.send(:+, 2) => 4

40. class APIRequestWrapper
attr_accessor :client
def initialize
@client = Savon::Client.new do |wsdl|
#wsdl.options go here
end
end
## Makes API request, request_name is string
## parameters is a Ruby hash
def make_api_request(request_name, paramenters)
@client.request(request_name.to_sym) do |soap|
soap.body = parameters
end
end
end

41. Some Real Life Samples

42. In Closing...

43. Open Classes

44. class Employee
def salary
“Some Number”
end
end
class Employee
def name
“Some Name”
end
end

45. Dynamic Methods

46. x = 2
x.send(:+, 2) => 4

47. Metaprogramming Ruby
by Paolo Perrotta
O’Reilly: http://obyk.us/39267
Amazon: http://obyk.us/1efe7

48. Thank You!