1 files changed, 7 insertions, 3 deletions
diff --git a/actionview/lib/action_view/template.rb b/actionview/lib/action_view/template.rb
index f398f9bfa3..6b61378a1f 100644
--- a/actionview/lib/action_view/template.rb
+++ b/actionview/lib/action_view/template.rb
@@ -313,15 +313,19 @@ module ActionView
 
       def locals_code #:nodoc:
         # Double assign to suppress the dreaded 'assigned but unused variable' warning
-        @locals.map { |key| "#{key} = #{key} = local_assigns[:#{key}];" }.join
+        @locals.each_with_object('') { |key, code| code << "#{key} = #{key} = local_assigns[:#{key}];" }
       end
 
       def method_name #:nodoc:
-        @method_name ||= "_#{identifier_method_name}__#{@identifier.hash}_#{__id__}".tr('-', "_")
+        @method_name ||= begin
+          m = "_#{identifier_method_name}__#{@identifier.hash}_#{__id__}"
+          m.tr!('-', '_')
+          m
+        end
       end
 
       def identifier_method_name #:nodoc:
-        inspect.gsub(/[^a-z_]/, '_')
+        inspect.tr('^a-z_', '_')
       end
 
       def instrument(action, &block)