Ruby 2.0 发布第二个预览版本。
该版本与 preview1 的差别在于：
- require is faster [#7158]
- Rake was updated to 0.9.5 [#7256]
- RDoc was updated to 4.0 [#7426]
- RubyGems was updated to 2.0 [#7427]
- minitest was updated to 4.3.2
- The default script encoding was changed to UTF-8 [#6679]
- libyaml was embedded [#7375]
- DTrace support was implemented [ruby-core:27448]
- Enumerator#size was introduced [#6636]
- Array#shift/unshift are faster [#6638]
- String#lines, #chars, etc. was changed to return an Array [#6670]
- hash algorithm was changed to siphash
主页：http://www.ruby-lang.org/zh_CN/
下载：http://ftp.ruby-lang.org/pub/ruby/2.0/ruby-2.0.0-preview2.tar.bz2
来自:开源中国社区
