The InteractiveRubyShell chapter in the Programming Ruby: The Pragmatic Programmer's Guide provides information about using and customizing the IRB. 『Programming Ruby: The Pragmatic Programmer's Guide』の「Interactive Ruby Shell」の章で、IRB の使用とカスタマイズについて解説されています。 - NetBeans
Support for native Ruby, Ruby on Rails 2.0, and JRubyRuby project type for Ruby and YAML filesRuby on Rails project typeEditor with syntactic and semantic code highlightingHints and quick fixes, refactoring, automatic code completionIntegrated Rake build toolIntegrated rdoc pop-upsAccess to InteractiveRubyShell (IRB)Integrated support for Test::Unit, Auto Test, and RSpec filesIntegrated WEBrick and Mongrel web serversDatabase migration integrationTemplates and code generatorDebugger for Ruby, JRuby, and Ruby on RailsRuby Gems Installation ManagerRake Runner
ネイティブ Ruby、Ruby on Rails 2.0、および JRuby のサポート Ruby および YAML ファイルの Ruby プロジェクトの種類 - NetBeans