初心者向けにRubyについて紹介しています。 (ターゲットの絞り込みが甘いため、内容的にブレがあります)

1. Kazuya NUMATA
for OSC-Do 2010 / Jun 26 2010

2. • ( Kazuya NUMATA)
•
• LOCAL
• 4 CA
•
•
•
• twitter: @kaznum
• Ruby 10 ?

3. Ruby

6. open(“/home/kaz/hogehoge.txt”) do |f|
f.each do |line|
print line
end
end #

7. [5, 6, 2, 26, 4].sort
=> [2, 4, 5, 6, 26]
( )
[5, 6, 2, 3, 5, 2].uniq
=> [5, 6, 2, 3]
[5, 6, 2, 3, 5, 2].uniq.sort
=> [2, 3, 5, 6]

8. 3.times { print “hello” }
3
=> “hellohellohello”

9. [2, 5, 1, 3, 9].map { |i| i * 3 }
=> [6, 15, 3, 9, 27]

10. Ruby on Rails
ActiveRecord
RubyGems ActiveSupport
....
$ sudo gem install <gem >

11. 25.minutes.ago
== Time.now - 25 * 60
Time.days_in_month(11)
== 30

12. Java(Struts + Spring) ...
public ActionForward edit(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
PersonForm personForm = (PersonForm) form;
if (personForm.getId() != null) {
PersonManager mgr = (PersonManager) getBean("personManager");
Person person = mgr.getPerson(personForm.getId());
personForm = (PersonForm) convert(person);
updateFormBean(mapping, request, personForm);
}
return mapping.findForward("edit");
}
http://www.relevancellc.com/blog/2007/05/12/static-typing-and-readable-code.html

13. But on “Ruby on Rails”,
def edit
@person = Person.find(params[:id])
end
http://www.relevancellc.com/blog/2007/05/12/static-typing-and-readable-code.html

16. ↓
↓

17. Matz Ruby (C Ruby)
jRuby (Java Ruby)
IronRuby (.NET Ruby)
RubyCocoa/Mac Ruby (Mac)
Rubinius (Ruby Ruby)
...

19. ( )

21. Test::Unit / rspec / cucumber
autotest

22. ( )

23. Thank you :)