Allows you to access static values by human names. eg. Browser::Firefox => 5

enumerables.rb

class EnumerableClass
  
  UNKNOWN_ENUMERABLE = "Unknown"
	
	class << self
  	def all
  		self.to_a.collect{|g| g[1]}
  	end

    def add_item(key,value)
      @hash ||= {}
      @hash[key]=value
    end
  
    def const_missing(key)
      @hash[key]
    end   
  
    def each
     to_a.each{|arr| yield(arr[0], arr[1])}
    end

    def to_a
      @hash.to_a.sort{|a,b| a[1].nil? && 1 || b[1].nil? && -1 || a[1] <=> b[1]}
    end
  
    def for_select
      sel = []
      @hash.values.each do |val|
        sel << [pretty_print(val), val]
      end
      sel.sort{|a,b| a[1].nil? && -1 || b[1].nil? && 1 || a[1] <=> b[1]}
    end

    def pretty_print(symbol_or_value)
      symbol = self[symbol_or_value].to_s
      if symbol =~ /_\d{1,}$/
        arr = symbol.split('_')
        "#{arr.last} #{arr[0...arr.length-1].join(' ')}"
      else 
        symbol.underscore.humanize
      end
    end
  
    def [](value)
      if value.class == String && @hash.keys.include?(value.to_sym)
        @hash[value.to_sym]
      else
        matches = @hash.to_a.select{|a| a[1] == value}.first
        matches ? matches.first.to_s : UNKNOWN_ENUMERABLE
      end
    end
  end
end




class Gender < EnumerableClass; end
class Browser < EnumerableClass; end
class EventType < EnumerableClass; end
class Source < EnumerableClass; end
class ShareType < EnumerableClass; end

Gender.add_item :Male, 0
Gender.add_item :Female, 1

Browser.add_item :Unknown, 0
Browser.add_item :IE9, 1
Browser.add_item :IE8, 2
Browser.add_item :IE7, 3
Browser.add_item :IE6, 4
Browser.add_item :Firefox, 5
Browser.add_item :Safari, 6
Browser.add_item :Chrome, 7
Browser.add_item :Opera, 8
Browser.add_item :Iphone, 9
Browser.add_item :Android, 10
Browser.add_item :Blackberry, 11

EventType.add_item :Login, 1
EventType.add_item :Registration, 2
EventType.add_item :Purchase, 3
EventType.add_item :Share, 4
EventType.add_item :Redeem, 5
EventType.add_item :Question, 6
EventType.add_item :Application, 7

Source.add_item :GS, 0
Source.add_item :AG, 1
Source.add_item :FB, 2
Source.add_item :TW, 3

ShareType.add_item :PerReferral, 0
ShareType.add_item :Avalanche, 1
ShareType.add_item :EarlyBird, 2