harp:~ > cat a.rb module M def [] *a, &b super ensure p 'overridden method called' end alias_method 'slice', '[]' end ( a = [0,1,2] ).extend M a[0] a.slice(0) harp:~ > ruby181 a.rb "overridden method called" "overridden method called" harp:~ > ruby186 a.rb "overridden method called" "overridden method called" a.rb:3:in `slice': super: no superclass method `[]' (NoMethodError) from a.rb:13 thoughts? -a -- be kind whenever possible... it is always possible. - the dalai lama