Hi, We are pleased to announce the release of Ruby 2.1.0-rc1. Please test the new features in Ruby 2.1 before the final release scheduled on 2013-12-25! ## Notable changes from preview 2 * remove curses. [#8584](http://bugs.ruby-lang.org/issues/8584) for other changes, see NEWS ## Download * [http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.tar.bz2](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.tar.bz2) * SIZE: 11394226 bytes * MD5: cae095b90349b5b0f7026060cc3dd2c5 * SHA256: af828bc0fe6aee5ffad0f8f10b48ee25964f54d5118570937ac7cf1c1df0edd3 * [http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.tar.gz](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.tar.gz) * SIZE: 14450990 bytes * MD5: a16561f64d78a902fab08693a300df98 * SHA256: 1b467f13be6d3b3648a4de76b34b748781fe4f504a19c08ffa348c75dd62635e * [http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.zip](http://cache.ruby-lang.org/pub/ruby/2.1/ruby-2.1.0-rc1.zip) * SIZE: 16107702 bytes * MD5: b6cdc0e63185b4aeb268bdf6ebd4de9f * SHA256: 4d6a256b73b79f5b64182e1f55db3e61042bbe0166a45917e69c1b4e47247276 ## Changes from 2.0 The notable changes are: * VM (method cache) * RGenGC(See ko1's [RubyKaigi presentation](http://rubykaigi.org/2013/talk/S73) and [RubyConf2013 presentation](http://www.atdot.net/~ko1/activities/rubyconf2013-ko1_pub.pdf)) * refinements [#8481](https://bugs.ruby-lang.org/issues/8481) [#8571](https://bugs.ruby-lang.org/issues/8571) * syntax changes * Decimal/Complex Literal [#8430](https://bugs.ruby-lang.org/issues/8430) * def's return value [#3753](https://bugs.ruby-lang.org/issues/3753) * Bignum * use GMP [#8796](https://bugs.ruby-lang.org/issues/8796) * String#scrub [#8414](https://bugs.ruby-lang.org/issues/8414) * Socket.getifaddrs [#8368](https://bugs.ruby-lang.org/issues/8368) * RDoc 4.1.0 and RubyGems 2.2.0 * "literal".freeze is now optimized [#9042](https://bugs.ruby-lang.org/issues/9042) * add Exception#cause [#8257](https://bugs.ruby-lang.org/issues/8257) * update libraries like json, nkf, rake, RubyGems, and RDoc. See more details of changes: [NEWS in ruby repository(WIP)](https://github.com/ruby/ruby/blob/v2_1_0_preview2/NEWS). ko1 talked about the new features of Ruby 2.1 at toruby: [All about Ruby 2.1](http://www.atdot.net/~ko1/activities/toruby05-ko1.pdf) Konstantin Haase (@konstantinhaase) wrote good summary in his blog post: [What's new in Ruby 2.1?](http://rkh.im/ruby-2.1). ## Release Comment Known issues are: [http://bugs.ruby-lang.org/projects/ruby-trunk/issues?query_id=102](http://bugs.ruby-lang.org/projects/ruby-trunk/issues?query_id=102) See also the release schedule and other information: [http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/ReleaseEngineering210](http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/ReleaseEngineering210) -- NARUSE, Yui <naruse / airemix.jp>