1. Top10 , Ruby - !

2. 10. 3.

, CPAN Perl,

Ruby:

• 96

• Ruby Application Archive (RAA) 1,200

• RubyForge 800

• RubyGems 900,000 gems-

4.

• 100%

• Ruby

• Usenet

• -

5.

, Ruby

• HP, Intel, NASA NOAA

Ruby

• , , , ,

• Ruby on Rails

• • - Basecamp Blinksale

6. 10. ! 7. 9. 8.

;

()

9. -

obj.attribute =

dangerous! query?

10.

:

• local_var = ...

• @instance_var = ...

• $global_var = ...

do...end {...}

Java-

: Ruby- #{...}

11.

Ruby:puts Hello world!

Java:threeVeryLongLines.weHopeWork...

Perl:#$

Lisp:((a(((b)))(c)))

12. 9. ! 13. 8. Ruby - - 14. Ruby - -

• , ... !

,

• self, Python

15. Ruby -

, Perl

( attr_accessor)

Ruby

16.

,

,

17. 8. Ruby - ! 18. 7. 19.

,

• :

• : ()

20. Ruby ... 21. ...

Java,

22. 7. ! 23. 6. 24. - Ruby while { ... } until { ... } while ... end until ... end do { ... } while do { ... } until begin ... end while begin ... end until foreach { ... } each do ... end for(...;...;...) { ... } 25. ?

N + 1

foreach { ... }

26.

N + 1

.

27. 6. ! 28. 5. 29. ?

30. ?

31. 5. ! 32. 4. 33.

eval()

• instance_eval()

• class_eval() module_eval()

34.

Hook into Rubys math and conversion operations

35. 4. ! 36. 3. Ruby 37. - , 38.

,

39. 3. Ruby ! 40. 2. 41. 96 Read/Write CSV XML YAML Talk to Email FTP Web Serve Code Servlets XML-RPC Work with Math Templates Threads Tools for Debugging Docs Testing 42. 2. ! 43. 1. (Mike Clark)