问我怎样才能找到我的Ruby程序运行在哪个操作系统上呢？

EN

module OS
  def OS.windows?
    (/cygwin|mswin|mingw|bccwin|wince|emx/ =~ RUBY_PLATFORM) != nil
  end

  def OS.mac?
   (/darwin/ =~ RUBY_PLATFORM) != nil
  end

  def OS.unix?
    !OS.windows?
  end

  def OS.linux?
    OS.unix? and not OS.mac?
  end

  def OS.jruby?
    RUBY_ENGINE == 'jruby'
  end
end

irb(main):002:0> require 'rbconfig'
=> true
irb(main):003:0> Config::CONFIG["arch"]
=> "i686-linux"

irb(main):004:0> RUBY_PLATFORM
=> "i686-linux"

require 'rbconfig'
include Config

case CONFIG['host_os']
  when /mswin|windows/i
    # Windows
  when /linux|arch/i
    # Linux
  when /sunos|solaris/i
    # Solaris
  when /darwin/i
    #MAC OS X
  else
    # whatever
end