lib/enumeration/collection.rb in enumeration-1.2.0 vs lib/enumeration/collection.rb in enumeration-1.2.1

@@ -23,10 +23,10 @@
     end
 
     # lookup collection key by a value
     def key(value)
       if self.map? && @data.has_value?(value)
-        @data.index(value)
+        @data.invert[value]
       elsif (self.map?  && @data.has_key?(value)) ||
             (self.list? && @data.include?(value))
         value
       else
         nil