lib/emittance/dispatcher/registration_collection_proxy.rb in emittance-0.1.0 vs lib/emittance/dispatcher/registration_collection_proxy.rb in emittance-0.1.1

@@ -15,20 +15,43 @@
 
       # @param args args passed to +Array#each+
       # @param blk block passed to +Array#each+
       # @return [RegistrationCollectionProxy] self
       def each(*args, &blk)
-        arrays = mappings.values.map(&:to_a)
         arrays.flatten.each(*args, &blk)
         self
       end
 
       # @return [Boolean] true if there are no registrations at all, false otherwise
       def empty?
         mappings.values.all?(&:empty?)
       end
 
+      # @return [Integer] the number of registrations that exist in the collection
+      def length
+        arrays.flatten.length
+      end
+
+      alias size length
+      alias count length
+
+      # @param idx [Integer] the index you wish to find
+      # @return the registration indexed at the specified index
+      def [](idx)
+        arrays.flatten[idx]
+      end
+
+      # @return the registration at the first index
+      def first
+        self[0]
+      end
+
+      # @return the registration at the last index
+      def last
+        self[-1]
+      end
+
       # @return [RegistrationCollectionProxy] self
       def <<(item)
         mappings[lookup_term] << item
         self
       end
@@ -40,8 +63,12 @@
       end
 
       private
 
       attr_reader :lookup_term, :mappings
+
+      def arrays
+        mappings.values.map(&:to_a)
+      end
     end
   end
 end