Programming languages are at the core of our profession. But we don't always give them as much credence as they deserve. The strength of Ruby lies in its heritage from a number of different languages, and a look at the history leading up to Ruby might reveal what lies in store for the future. At the moment a lot of attention is spent looking at programming languages and developers are realizing that your language is an important tool. I will talk a little bit about why languages matter, why you should know several, and what the future of languages might look like.

1. OLA BINI
http://olabini.com
söndag, 2010 mars 21

2. The Tao gave birth to machine
language
Machine language gave birth to
the assembler
söndag, 2010 mars 21

3. The assembler gave birth to the
compiler
Now there are ten thousand
languages
söndag, 2010 mars 21

4. Each language has its purpose,
however humble
Each language expresses the Yin
and Yang of software
Each language has its place within
the Tao
söndag, 2010 mars 21

5. But do not program in COBOL if
you can avoid it
söndag, 2010 mars 21

6. söndag, 2010 mars 21

7. söndag, 2010 mars 21

8. Greenspun's Tenth Rule of
Programming
söndag, 2010 mars 21

9. General purpose languages
Special purpose languages
Domain specific languages
söndag, 2010 mars 21

10. Where are we now?
söndag, 2010 mars 21

11. Java
söndag, 2010 mars 21

12. söndag, 2010 mars 21

13. “Scripting” languages
söndag, 2010 mars 21

14. “Scripting” languages
Pragmatic languages
söndag, 2010 mars 21

15. Where did we come from?
söndag, 2010 mars 21

16. Ruby lineage
söndag, 2010 mars 21

17. a, b, c = 42, 69, 25
söndag, 2010 mars 21

18. def foo
yield 42
3.times do |n|
yield n*25
end
end
foo { |x| puts x }
söndag, 2010 mars 21

19. CLU
söndag, 2010 mars 21

20. /^(d{3})-(d{4})$/ =~ phone_number
söndag, 2010 mars 21

21. $x = 42
@me = other
@@foo += 2
söndag, 2010 mars 21

22. Global swearing
$/ = “%”
$= = true
puts $!
söndag, 2010 mars 21

23. puts “hello” unless moon == :full
söndag, 2010 mars 21

24. Perl
söndag, 2010 mars 21

25. class MyNumber < Number; end
söndag, 2010 mars 21

26. foo.send :answer?, 42
söndag, 2010 mars 21

27. puts obj.methods.grep /=$/
söndag, 2010 mars 21

28. Smalltalk
söndag, 2010 mars 21

29. class Foo
include ExampleMethods
end
baz.extend ExampleMethods
söndag, 2010 mars 21

30. Lisp Machine Lisp
söndag, 2010 mars 21

31. def incrementor(x)
lambda do
next, x = x, x+1
next
end
end
i = incrementor(10)
i.call # => 10
i.call # => 11
i.call # => 12
söndag, 2010 mars 21

32. Scheme
söndag, 2010 mars 21

33. Ruby
söndag, 2010 mars 21

34. Good design is not innovation
Good design is choosing what to
include - and what to not include
söndag, 2010 mars 21

35. söndag, 2010 mars 21

36. Imperative programming
söndag, 2010 mars 21

37. Functional programming
söndag, 2010 mars 21

38. Logic programming
söndag, 2010 mars 21

39. Object oriented programming
söndag, 2010 mars 21

40. Domain specific languages
söndag, 2010 mars 21

41. Multiparadigm languages
söndag, 2010 mars 21

42. Ceremony vs Essence
söndag, 2010 mars 21

43. Typing
söndag, 2010 mars 21

44. söndag, 2010 mars 21

45. Natural languages?
söndag, 2010 mars 21

46. söndag, 2010 mars 21

47. Design
söndag, 2010 mars 21

48. Communication
söndag, 2010 mars 21

49. Abstraction
söndag, 2010 mars 21

50. Expressiveness
söndag, 2010 mars 21

51. First class
söndag, 2010 mars 21

52. Focused or multiparadigm?
söndag, 2010 mars 21

53. Where are we going?
söndag, 2010 mars 21

54. Is concurrency really a large
problem?
söndag, 2010 mars 21

55. söndag, 2010 mars 21

56. More programming languages -
not fewer
söndag, 2010 mars 21

57. Language leverage
söndag, 2010 mars 21

58. söndag, 2010 mars 21

59. Higher level
söndag, 2010 mars 21

60. Slowness and wastefulness
söndag, 2010 mars 21

61. Virtual machines
söndag, 2010 mars 21

62. Text based languages?
söndag, 2010 mars 21

63. AST languages?
söndag, 2010 mars 21

64. Language workbenches
söndag, 2010 mars 21

65. NBL?
söndag, 2010 mars 21

66. Other paradigms?
söndag, 2010 mars 21

67. söndag, 2010 mars 21

68. söndag, 2010 mars 21

69. It’s going to be interesting
söndag, 2010 mars 21

70. Where is Ruby going?
söndag, 2010 mars 21

71. Ruby 2.0
söndag, 2010 mars 21

72. I don’t know
söndag, 2010 mars 21

73. Easier to modify the language
söndag, 2010 mars 21

74. Canonical AST
söndag, 2010 mars 21

75. Simplify the core?
söndag, 2010 mars 21

76. Scoped extensions
söndag, 2010 mars 21

77. DSLs
söndag, 2010 mars 21

78. Concurrency?
söndag, 2010 mars 21

79. Typing?
söndag, 2010 mars 21

80. RubyX
söndag, 2010 mars 21

81. The future
söndag, 2010 mars 21