Christmas present for you

1. Christmas present
for you

2. • Kazuki Tanaka (Gogo Tanaka)
• Maintained Ruby itself in Japan.
(sometimes contributed Rails)
• Made own my programing language 'Hilbert'
• https://github.com/gogotanaka
Who am I

3. Christmas present this year is ....

4. Ruby 2.2.0!

5. Ruby 2.2.0 will be
released this Christmas!!

6. I'm gonna talk about
Ruby 2.2.0(Rails 5.0, Ruby3.0)

7. Rails 5.0 will support
only Ruby 2.2.0 or later.

8. Symbol GC
Most symbols which are
returned by String#to_sym
and String#intern are GC-able.

9. http://
weblog.rubyonrails.org/
2014/8/20/Rails-4-2-beta1/

10. What feature of Ruby
2.2.0 is?

11. https://github.com/ruby/
ruby/blob/trunk/NEWS

12. Let me introduce
remarkable features.

13. Object#itself
Enumerable#slice_when
Binding#local_variables
!
keyword arguments
without default value

14. Incremental GC
Any garbage-collector that can run
incrementally, instead of having to run the
whole collection without interruption.

15. Have a very Merry
Christmas!

16. Ruby 3.0