type, in ruby, only crappily done and not cross platform, THE HORROR

gistfile1.rb

def type(name)                                                           
  ENV['PATH'].split(File::PATH_SEPARATOR).each do |p|
    que = p + File::SEPARATOR + name
    return que if File.exists?(que) and File.executable?(que)
  end
  false
end
type 'foo'        # false
type 'openssl'    # '/usr/bin/openssl'