Ruby: defining class level hash with default values

class LogEntry

end

EntryType = { :error => 0, :warning => 1, :info => 2 }

LogEntry.EntryType[:error]

class LogEntry
    EntryType = { :error => 0, :warning => 1, :info => 2 }
end

LogEntry::EntryType[:error]

class LogEntry

  def self.types
    { :error => 0, :warning => 1, :info => 2 }
  end

end

# And a simple test
LogEntry.types[:error].should be_an_instance_of(Hash)

class LogEntry
  @@ErrorType = 0
End

LogEntry.ErrorType

class LogEntry
  attr_reader :type
  ERROR_RANKING = [ :error, :warning, :info, ]
  include Comparable

  def initialize( type )
    @type = type
  end

  def <=>( other )
    ERROR_RANKING.index( @type ) <=> ERROR_RANKING.index( other.type )
  end
end

entry1 = LogEntry.new( :error )
entry2 = LogEntry.new( :warning )

puts entry1.type.inspect
#=> :error
puts entry2.type.inspect
#=> :warning
puts( ( entry1 > entry2 ).inspect )
#=> false
puts( ( entry1 < entry2 ).inspect )
#=> true