lib/renum/enumerated_value.rb in renum-1.2.0 vs lib/renum/enumerated_value.rb in renum-1.3.1

@@ -1,47 +1,57 @@
 require 'forwardable'
 
 module Renum
 
   # This is the superclass of all enumeration classes. 
-  # An enumeration class is Enumerable over its values and also delegates [] 
-  # to the values array.
+  # An enumeration class is Enumerable over its values and exposes them by numeric index via [].
   # Values are also comparable, sorting into the order in which they're declared.
   class EnumeratedValue
-    
+
     class << self
       include Enumerable
       extend Forwardable
-      
+
       def_delegators :values, :each, :[]
-      
+
       # Returns an array of values in the order they're declared.
       def values
         @values ||= []
       end
-      
+
+      def with_name name
+        values_by_name[name]
+      end
+
+      def values_by_name
+        @values_by_name ||= values.inject({}) do |memo, value|
+          memo[value.name] = value
+          memo
+        end.freeze
+      end
+
     end
-    
+
     include Comparable
-    attr_reader :name
-    attr_reader :index
-    
+
+    attr_reader :name, :index
+
     def initialize name
-      @name = name.to_s
+      @name = name.to_s.freeze
       @index = self.class.values.size
       self.class.values << self
     end
-    
-    # Returns the fully qualified constant referring to this value.
+
+    # Returns the fully qualified name of the constant referring to this value.
     # Don't override this if you're using Renum with the constantize_attribute 
     # plugin, which relies on this behavior.
     def to_s
       "#{self.class}::#{name}"
     end
-    
+
     # Sorts enumerated values into the order in which they're declared.
     def <=> other
       index <=> other.index
     end
-    
+
   end
-end
\ No newline at end of file
+end