Fun fact, the arity of functions generated by Symbol#to_proc is not 1 but -2 (that is, additional arguments are passed through as well), so we can write stuff l

Fun fact, the arity of functions generated by Symbol#to_proc is not 1 but -2 (that is, additional arguments are passed through as well), so we can write stuff like module MissionControl #... [Proc, Method, Binding, UnboundMethod].each_with_object(self, &:include) end if one were so inclined.